HELP: Voltage drop causing stalling!
HELP: Voltage drop causing stalling!
i need help on this...i really don't get why... whenever i stop on a uphill due to stop lights or stop signs... the car stalls and keeps stalling time after time... on my apex turbo timer..under voltage... it reads when i lets go of the clutch... the voltage drops below 11...and stalls.. normally its at 14.7.. cause someone help me on this... its getting worse and worse... my evo isnt heavily modded or anything... my mods are listed below... tell me whats going on... i have 3500 miles on it
im going crazy on this stalling issue..i don't have a broad knowledge on cars so someone help me out... i have hyper voltage system and grouding system installed...that should make the voltage current run more stable and smoothly... why it dropping under 11 when i tries to drive uphill and it stalls...
could it be the turbo timer has messed up my voltage flow somehow?
could it be the turbo timer has messed up my voltage flow somehow?
get a grounding kit!!!!!!!!!!!!! This was my 1st mod and it fixed my problem and keeps the volts more constant under accessory load.
WHOOPS you have one. My guess is it is your power inverter. Start there..
WHOOPS you have one. My guess is it is your power inverter. Start there..
my power inverter is never on..only when i use it.. i didnt tap the power of anything...i added a circuit for it...
i really can't tell how a intake affects the voltage and causes stalling... i was told i should get a retune...
i really can't tell how a intake affects the voltage and causes stalling... i was told i should get a retune...
Originally Posted by J8dailo
my power inverter is never on..only when i use it.. i didnt tap the power of anything...i added a circuit for it...
i really can't tell how a intake affects the voltage and causes stalling... i was told i should get a retune...
i really can't tell how a intake affects the voltage and causes stalling... i was told i should get a retune...
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It actually sounds like your idle speed is dropping, the low output voltage may just be a symptom and not the cause.
It could be an output problem on your alternator (Regulator) but if its happening on a hill, I'm inclined to think that there may be a intermittant connection or some sort of load is causing the engine speed to drop.
Here's a way to test to be 100% certain if its your alternator or electrical system..
Turn on your headlights, defogger, A/C on MAX so the fans are on, a few other electrical items, look at the voltage output, look good? If not, you may have low output on your alternator or something might be wrong with your grounding/voltage system (BTW those voltage systems are useless) Now, do the same thing but turn your steering wheel all the way, see if you can get the engine idle to drop, if it stalls, then you may have an output problem on the alternator.
I don't see in your mods if you have aftermarket pulleys so I'll assume their stock..
But here are the things that COULD cause the stalling, that you can swap out to see if it helps..
1) Hyper Voltage system
2) Power Inverter (it could be drawing power even though its off)
3) the Intake, especially with a stock DV it could be bypassing too much air back into the intake..
4) your TURBO Timer..
Start by taking a look for a vacuum leak, its one of those "not so obvious" things that can affect your idle dramatically, also check for obvious leaks on your intercooler pipes, and tighten the clamps on your DV..
Then if you can, put your stock intake pipe and airbox back on..
If that doesnt solve it, you may find you have to disconnect your Turbo Timer, Hyper Voltage System, and Power Inverter, one item at a time, and then all of them at the same time.. see if that helps.
If nothing helps, then get access to an OBD-II scanner, see what the Air Mass (Airflow rate) value is.. if it falls very low compared to when its running normally, It probably could use a retune so your fuel trims are within a normal range and not constantly hunting/resetting (if that has anything to do with it)
Here's a pretty OBSCURE suggestion, check to see if your engine oil is overfilled.. If it is very high, there's a possibility that the oil level is high enough to hit the crank on an incline which can slow engine speed.. This is VERY VERY VERY obscure, however I have seen one occasion on a front drive car with a steep incline and overfilled with oil.. (Trust me, this is unlikely and overfilling results in other problems which are more obvious)
In the end, I'm also inclined to think you may need to tune your idle for your intake or engine combination.. But those are *ALL* of the things I'd look for.
It could be an output problem on your alternator (Regulator) but if its happening on a hill, I'm inclined to think that there may be a intermittant connection or some sort of load is causing the engine speed to drop.
Here's a way to test to be 100% certain if its your alternator or electrical system..
Turn on your headlights, defogger, A/C on MAX so the fans are on, a few other electrical items, look at the voltage output, look good? If not, you may have low output on your alternator or something might be wrong with your grounding/voltage system (BTW those voltage systems are useless) Now, do the same thing but turn your steering wheel all the way, see if you can get the engine idle to drop, if it stalls, then you may have an output problem on the alternator.
I don't see in your mods if you have aftermarket pulleys so I'll assume their stock..
But here are the things that COULD cause the stalling, that you can swap out to see if it helps..
1) Hyper Voltage system
2) Power Inverter (it could be drawing power even though its off)
3) the Intake, especially with a stock DV it could be bypassing too much air back into the intake..
4) your TURBO Timer..
Start by taking a look for a vacuum leak, its one of those "not so obvious" things that can affect your idle dramatically, also check for obvious leaks on your intercooler pipes, and tighten the clamps on your DV..
Then if you can, put your stock intake pipe and airbox back on..
If that doesnt solve it, you may find you have to disconnect your Turbo Timer, Hyper Voltage System, and Power Inverter, one item at a time, and then all of them at the same time.. see if that helps.
If nothing helps, then get access to an OBD-II scanner, see what the Air Mass (Airflow rate) value is.. if it falls very low compared to when its running normally, It probably could use a retune so your fuel trims are within a normal range and not constantly hunting/resetting (if that has anything to do with it)
Here's a pretty OBSCURE suggestion, check to see if your engine oil is overfilled.. If it is very high, there's a possibility that the oil level is high enough to hit the crank on an incline which can slow engine speed.. This is VERY VERY VERY obscure, however I have seen one occasion on a front drive car with a steep incline and overfilled with oil.. (Trust me, this is unlikely and overfilling results in other problems which are more obvious)
In the end, I'm also inclined to think you may need to tune your idle for your intake or engine combination.. But those are *ALL* of the things I'd look for.
i tried all that but the voltage still reads the same pretty much... just when the clutch is engaging going up a hill...the voltage meter reads it drops instantly to under 11 and stalls...
my motor oil seem to be in a normal level..expect the dark color..
my motor oil seem to be in a normal level..expect the dark color..
Originally Posted by MalibuJack
It actually sounds like your idle speed is dropping, the low output voltage may just be a symptom and not the cause.
It could be an output problem on your alternator (Regulator) but if its happening on a hill, I'm inclined to think that there may be a intermittant connection or some sort of load is causing the engine speed to drop.
Here's a way to test to be 100% certain if its your alternator or electrical system..
Turn on your headlights, defogger, A/C on MAX so the fans are on, a few other electrical items, look at the voltage output, look good? If not, you may have low output on your alternator or something might be wrong with your grounding/voltage system (BTW those voltage systems are useless) Now, do the same thing but turn your steering wheel all the way, see if you can get the engine idle to drop, if it stalls, then you may have an output problem on the alternator.
I don't see in your mods if you have aftermarket pulleys so I'll assume their stock..
But here are the things that COULD cause the stalling, that you can swap out to see if it helps..
1) Hyper Voltage system
2) Power Inverter (it could be drawing power even though its off)
3) the Intake, especially with a stock DV it could be bypassing too much air back into the intake..
4) your TURBO Timer..
Start by taking a look for a vacuum leak, its one of those "not so obvious" things that can affect your idle dramatically, also check for obvious leaks on your intercooler pipes, and tighten the clamps on your DV..
Then if you can, put your stock intake pipe and airbox back on..
If that doesnt solve it, you may find you have to disconnect your Turbo Timer, Hyper Voltage System, and Power Inverter, one item at a time, and then all of them at the same time.. see if that helps.
If nothing helps, then get access to an OBD-II scanner, see what the Air Mass (Airflow rate) value is.. if it falls very low compared to when its running normally, It probably could use a retune so your fuel trims are within a normal range and not constantly hunting/resetting (if that has anything to do with it)
Here's a pretty OBSCURE suggestion, check to see if your engine oil is overfilled.. If it is very high, there's a possibility that the oil level is high enough to hit the crank on an incline which can slow engine speed.. This is VERY VERY VERY obscure, however I have seen one occasion on a front drive car with a steep incline and overfilled with oil.. (Trust me, this is unlikely and overfilling results in other problems which are more obvious)
In the end, I'm also inclined to think you may need to tune your idle for your intake or engine combination.. But those are *ALL* of the things I'd look for.
It could be an output problem on your alternator (Regulator) but if its happening on a hill, I'm inclined to think that there may be a intermittant connection or some sort of load is causing the engine speed to drop.
Here's a way to test to be 100% certain if its your alternator or electrical system..
Turn on your headlights, defogger, A/C on MAX so the fans are on, a few other electrical items, look at the voltage output, look good? If not, you may have low output on your alternator or something might be wrong with your grounding/voltage system (BTW those voltage systems are useless) Now, do the same thing but turn your steering wheel all the way, see if you can get the engine idle to drop, if it stalls, then you may have an output problem on the alternator.
I don't see in your mods if you have aftermarket pulleys so I'll assume their stock..
But here are the things that COULD cause the stalling, that you can swap out to see if it helps..
1) Hyper Voltage system
2) Power Inverter (it could be drawing power even though its off)
3) the Intake, especially with a stock DV it could be bypassing too much air back into the intake..
4) your TURBO Timer..
Start by taking a look for a vacuum leak, its one of those "not so obvious" things that can affect your idle dramatically, also check for obvious leaks on your intercooler pipes, and tighten the clamps on your DV..
Then if you can, put your stock intake pipe and airbox back on..
If that doesnt solve it, you may find you have to disconnect your Turbo Timer, Hyper Voltage System, and Power Inverter, one item at a time, and then all of them at the same time.. see if that helps.
If nothing helps, then get access to an OBD-II scanner, see what the Air Mass (Airflow rate) value is.. if it falls very low compared to when its running normally, It probably could use a retune so your fuel trims are within a normal range and not constantly hunting/resetting (if that has anything to do with it)
Here's a pretty OBSCURE suggestion, check to see if your engine oil is overfilled.. If it is very high, there's a possibility that the oil level is high enough to hit the crank on an incline which can slow engine speed.. This is VERY VERY VERY obscure, however I have seen one occasion on a front drive car with a steep incline and overfilled with oil.. (Trust me, this is unlikely and overfilling results in other problems which are more obvious)
In the end, I'm also inclined to think you may need to tune your idle for your intake or engine combination.. But those are *ALL* of the things I'd look for.
ay... i tried it again...it the voltage dropped to 12 with everything on, AC, headlight, sound, power inverter... so now what?
and well..i tried it again today...the car was just started to warm up...and the voltage was stable at 14.5... i don't get it...
and well..i tried it again today...the car was just started to warm up...and the voltage was stable at 14.5... i don't get it...
Originally Posted by MalibuJack
It actually sounds like your idle speed is dropping, the low output voltage may just be a symptom and not the cause.
It could be an output problem on your alternator (Regulator) but if its happening on a hill, I'm inclined to think that there may be a intermittant connection or some sort of load is causing the engine speed to drop.
Here's a way to test to be 100% certain if its your alternator or electrical system..
Turn on your headlights, defogger, A/C on MAX so the fans are on, a few other electrical items, look at the voltage output, look good? If not, you may have low output on your alternator or something might be wrong with your grounding/voltage system (BTW those voltage systems are useless) Now, do the same thing but turn your steering wheel all the way, see if you can get the engine idle to drop, if it stalls, then you may have an output problem on the alternator.
I don't see in your mods if you have aftermarket pulleys so I'll assume their stock..
But here are the things that COULD cause the stalling, that you can swap out to see if it helps..
1) Hyper Voltage system
2) Power Inverter (it could be drawing power even though its off)
3) the Intake, especially with a stock DV it could be bypassing too much air back into the intake..
4) your TURBO Timer..
Start by taking a look for a vacuum leak, its one of those "not so obvious" things that can affect your idle dramatically, also check for obvious leaks on your intercooler pipes, and tighten the clamps on your DV..
Then if you can, put your stock intake pipe and airbox back on..
If that doesnt solve it, you may find you have to disconnect your Turbo Timer, Hyper Voltage System, and Power Inverter, one item at a time, and then all of them at the same time.. see if that helps.
If nothing helps, then get access to an OBD-II scanner, see what the Air Mass (Airflow rate) value is.. if it falls very low compared to when its running normally, It probably could use a retune so your fuel trims are within a normal range and not constantly hunting/resetting (if that has anything to do with it)
Here's a pretty OBSCURE suggestion, check to see if your engine oil is overfilled.. If it is very high, there's a possibility that the oil level is high enough to hit the crank on an incline which can slow engine speed.. This is VERY VERY VERY obscure, however I have seen one occasion on a front drive car with a steep incline and overfilled with oil.. (Trust me, this is unlikely and overfilling results in other problems which are more obvious)
In the end, I'm also inclined to think you may need to tune your idle for your intake or engine combination.. But those are *ALL* of the things I'd look for.
It could be an output problem on your alternator (Regulator) but if its happening on a hill, I'm inclined to think that there may be a intermittant connection or some sort of load is causing the engine speed to drop.
Here's a way to test to be 100% certain if its your alternator or electrical system..
Turn on your headlights, defogger, A/C on MAX so the fans are on, a few other electrical items, look at the voltage output, look good? If not, you may have low output on your alternator or something might be wrong with your grounding/voltage system (BTW those voltage systems are useless) Now, do the same thing but turn your steering wheel all the way, see if you can get the engine idle to drop, if it stalls, then you may have an output problem on the alternator.
I don't see in your mods if you have aftermarket pulleys so I'll assume their stock..
But here are the things that COULD cause the stalling, that you can swap out to see if it helps..
1) Hyper Voltage system
2) Power Inverter (it could be drawing power even though its off)
3) the Intake, especially with a stock DV it could be bypassing too much air back into the intake..
4) your TURBO Timer..
Start by taking a look for a vacuum leak, its one of those "not so obvious" things that can affect your idle dramatically, also check for obvious leaks on your intercooler pipes, and tighten the clamps on your DV..
Then if you can, put your stock intake pipe and airbox back on..
If that doesnt solve it, you may find you have to disconnect your Turbo Timer, Hyper Voltage System, and Power Inverter, one item at a time, and then all of them at the same time.. see if that helps.
If nothing helps, then get access to an OBD-II scanner, see what the Air Mass (Airflow rate) value is.. if it falls very low compared to when its running normally, It probably could use a retune so your fuel trims are within a normal range and not constantly hunting/resetting (if that has anything to do with it)
Here's a pretty OBSCURE suggestion, check to see if your engine oil is overfilled.. If it is very high, there's a possibility that the oil level is high enough to hit the crank on an incline which can slow engine speed.. This is VERY VERY VERY obscure, however I have seen one occasion on a front drive car with a steep incline and overfilled with oil.. (Trust me, this is unlikely and overfilling results in other problems which are more obvious)
In the end, I'm also inclined to think you may need to tune your idle for your intake or engine combination.. But those are *ALL* of the things I'd look for.
Evolving Member
Joined: Feb 2005
Posts: 127
Likes: 0
From: San Diego, CA
I think the voltage is a symptom of the problem, not the cause. Once the car is started up, the battery doesn't have much of an influence on how the engine runs (i.e. the voltage of your electrical system won't affect spark power or anything, that is all driven from the coil) other than providing power for the ECU (Electronic Control Unit, the box that controls all major aspects of the engine), but dropping down to 11V won't cause it to stop functioning.
How are you revving the engine/releasing the clutch when you start on the hill? Just normal like you were going on a flat surface, or higher rev/more clutch slip?
I'm not sure about the specifics of your intake, but there's a pretty good possibility that it is interfering with the readings of the stock MAF (mass airflow) sensor and confusing the ECU, causing a rich condition which will foul the sparkplugs and can cause stalling at lower RPMs (this is the same reason VTA BOV's can cause stalling). If you are aren't going to get your ECU reflashed, try doing a little heel-toe while sitting at idle in conditions you think your car might stall - do this by holding the brake with the inside part of the ball of your foot and manipulating your foot so you can push the gas pedal slightly to make the car hold at around 1500rpm. That should help to keep the plugs clean and prevent stalling.
How are you revving the engine/releasing the clutch when you start on the hill? Just normal like you were going on a flat surface, or higher rev/more clutch slip?
I'm not sure about the specifics of your intake, but there's a pretty good possibility that it is interfering with the readings of the stock MAF (mass airflow) sensor and confusing the ECU, causing a rich condition which will foul the sparkplugs and can cause stalling at lower RPMs (this is the same reason VTA BOV's can cause stalling). If you are aren't going to get your ECU reflashed, try doing a little heel-toe while sitting at idle in conditions you think your car might stall - do this by holding the brake with the inside part of the ball of your foot and manipulating your foot so you can push the gas pedal slightly to make the car hold at around 1500rpm. That should help to keep the plugs clean and prevent stalling.
Last edited by rezo; Apr 3, 2005 at 09:34 AM.
Originally Posted by J8dailo
i need help on this...i really don't get why... whenever i stop on a uphill due to stop lights or stop signs... the car stalls and keeps stalling time after time... on my apex turbo timer..under voltage... it reads when i lets go of the clutch... the voltage drops below 11...and stalls.. normally its at 14.7.. cause someone help me on this... its getting worse and worse... my evo isnt heavily modded or anything... my mods are listed below... tell me whats going on... i have 3500 miles on it
Take it to one of the autoparts places and have them check the electrical system. Basically they load the system and can tell you the results in a flash. There are some battery chargers that will do the same/similar thing. I got one from Wal-Mart. It can charge and test your electrical system.
Since it appears to be new take it back to the dealer.
Return to the electical back to stock (as much as possible) and trouble shoot from there.
Check the Hotzuma for installation correct polarity. (I have one of the Hotzuma sitting on a box)
Disconnect the Hotzuma and check your "V" output.
Check your Power inverter for correct installation polarity.
m~
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