Evo IX - "Service Engine Soon" light blinking under heavy boost
Just like the title says. I don't feel any loss in power from the car, just the blinking "Service Engine Soon" light, and the light does not stay stagnate, it only blinks 3 or 4 times under heavy boost and then disapears as soon as i let my foot off the accelerator.
I had a mechanic run a diagnostics for any codes and he said he couldn't find any, so he was telling me it could be my lightweight flywheel causing the computer it to think it's over-revving but that didn't sound right...but i could be wrong Another variable is that I was tuned on E-85 for a long while and was recently tuned back to 91 for convenience reasons within the last week and a half and have filled up twice on 91 since then, and on my most recent fill-up I added a fuel additive (don't know if that has anything to do with it) Anyone have any idea what this might be? |
It could be that your tuner has programmed it to blink to indicate knock.
|
^ This. Its a safety feature built into the software your car is running now.
If its constantly happening call your tuner and let him know you need a retune. Tell them whats going on and they should take care of you. |
Def knock indicator
|
usally a blinking check engine light means engine missfire.
|
whoaaa not good. turn that **** down for now lol
|
knock indicator like everyone else said...had it put in my tune
|
Originally Posted by AlisterMcRae
(Post 9506361)
Just like the title says. I don't feel any loss in power from the car, just the blinking "Service Engine Soon" light, and the light does not stay stagnate, it only blinks 3 or 4 times under heavy boost and then disapears as soon as i let my foot off the accelerator.
I had a mechanic run a diagnostics for any codes and he said he couldn't find any, so he was telling me it could be my lightweight flywheel causing the computer it to think it's over-revving but that didn't sound right...but i could be wrong Another variable is that I was tuned on E-85 for a long while and was recently tuned back to 91 for convenience reasons within the last week and a half and have filled up twice on 91 since then, and on my most recent fill-up I added a fuel additive (don't know if that has anything to do with it) Anyone have any idea what this might be? Like everyone else said, it's definitely the flash on knock function found in the Tephra ROMs. |
fuel has alot to do with knock
|
Originally Posted by wht95scort
(Post 9508540)
usally a blinking check engine light means engine missfire.
To the OP: 99% of all stock ECU tuned Evo's run what is called "TephraMod." I would be willing to bet money this is what your car is flashed with. TephraMod has an option where it will blink the check engine light when knock is detected, and pull timing to save the motor. If your tuner has the timing too aggressive for a 91 octane tune, then there would certainly be knock at high load and the light would blink. Take your car back to your tuner and tell them you need it fixed. Or there are also a host of tuners here on the forums who can do email tunes if you have the correct cable. -Acree |
Yea, a blinking check engine light is for a misfire, unless it's obviously been changed to indicate knock by a tuner. Either way, it's not a good thing.
|
I will also agree it's prolly knock especially if there are no codes in your ecu when you plug into it. Are you running dual maps with a switch or are you flip flopping manually with ecu flash?
|
Lol at your mechanic Please find a new one
|
Just an update, I talked to the guy who originally tuned the car (not the idiot mechanic) and he informed me that it was a feature he put in the ROM to let me know when it sees knock. He said there is slow flash knock (3 counts or less) and the fast flash (5 counts and up). He said it's probably due to the result of heat soak because of the temps and humidity we have been having in Arizona lately and of course 91 octane pump gas.
He said that if I am doing the same pull and the knock is consistant, then just swing by and he would fix it until winter rolled around. |
Originally Posted by AlisterMcRae
(Post 9509099)
Just an update, I talked to the guy who originally tuned the car (not the idiot mechanic) and he informed me that it was a feature he put in the ROM to let me know when it sees knock. He said there is slow flash knock (3 counts or less) and the fast flash (5 counts and up). He said it's probably due to the result of heat soak because of the temps and humidity we have been having in Arizona lately and of course 91 octane pump gas.
He said that if I am doing the same pull and the knock is consistant, then just swing by and he would fix it until winter rolled around. Just my opinion... |
Originally Posted by ProPilot04
(Post 9509894)
While this sounds legit, I'd probably go and have the tune tweaked to be a tad less aggressive just in case? You'd be sacrificing a tad of horsepower to prevent grenading your motor?
Just my opinion...
Originally Posted by AlisterMcRae
(Post 9509099)
He said that if I am doing the same pull and the knock is consistant, then just swing by and he would fix it until winter rolled around.
|
lol do the same pull and if it blows up ill fix it is what hes saying! i wouldnt do that pull again. id goto him right now and make him fix it on the dyno so if it blows they pay
|
I am going to get it fixed this weekend, until then, I have been driving around like a school bus trying not to boost...haha
|
Low counts of knock isn't a major issue (debatable depending who you ask), a lot of people are content with 1 to 2 counts of knock and others won't tolerate a single count. Obviously 0 counts is ideal. I'm content with 1 count and a rare count of 2.
Have you logged a pull to see precisely how much knock you have? |
+1... Knock sum is kind of an anomaly. I mean it’s basically a harmonic irregularity given off by the motor that is picked up by a sensor (microphone of sorts) if I am not mistaking. So when using Evoscan during logging you may see your knock sum at 1…1…1 then jump to 7 then back to 0 just between 4000-4250 rpm range. Hell I have seen them climb as high as 35 on some Evoscan spreadsheets. Now don’t misunderstand me, I’m not advocating that this is Ok or that you should ignore it by any means! And if your CEL light is flashing the way that you claim then you have much higher and consistent counts than 1-3. I don’t recall exactly what the baseline parameters are in Tephra Mod 7 for slow flash CEL vs quick flash CEL but because yours is flashing at all definitely keep your foot out of it. {thumbup}
|
Can anyOne direct me to a source that can fix this... I'm having the same issue bought the car modded I have the cable where can I find or who can I talk to to fix it?
|
Originally Posted by pghdude54321
(Post 9990008)
Can anyOne direct me to a source that can fix this... I'm having the same issue bought the car modded I have the cable where can I find or who can I talk to to fix it?
BTW, you don't have a 2006 Evo 8. If it is a 2006 then it is an Evo 9. ;) |
I also got these falshing problems, but in low boost, it appears from .1 to .6. Was it a false knock? Once it reaches .7 bar it disappears and the car runs hard at high boost..
This had Happened only after i changed from ebc to mbc. |
Originally Posted by mrbooster
(Post 10245297)
I also got these falshing problems, but in low boost, it appears from .1 to .6. Was it a false knock? Once it reaches .7 bar it disappears and the car runs hard at high boost..
This had Happened only after i changed from ebc to mbc. |
All times are GMT -7. The time now is 02:20 AM. |
© 2024 MH Sub I, LLC dba Internet Brands