Problems P0170 fuel trim in Evo7
Problems P0170 fuel trim in Evo7
First of all, the car is an Evo7, ecuflash doesn't see it so I can't get to the fuel trims or anything else. Thankfully Jestr is helping me out a lot, but seeing as I need some more ideas I'll post up.
The car is cammed with revolver cams, has 850cc injectors and a FPR. Car runs TOO RICH at idle and idling a bit low still (800-900). We're trying to get this car to pass an OBDII inspection, but it keeps on tripping this code, p0170 and the o2 and catalyst are never ready.
We reflashed it.. CEL came on after 40 miles. I used the evoscan and found the front O2 wasn't cycling anymore. We replaced the O2 with a generic bosch one, the O2 doesn't respond super fast, but it does change voltage when driving and changing speeds. Is this because it's a crappy sensor, or because the car is still running too rich? I've done some reading, and they point to MAF problems or vaccuum leaks that may cause more of these problems. Not sure what else to do until Jester emails back with a new flash or more solutions. We can boost leak test it tomorrow.
In the mean time, still trying to figure out how to do this OBDII thing. The guy says that the machine reads the VIN while doing this test and I cannot just pull my car up beside it. Yes, I know it's not the "correct" way to do this now. We just want to make sure it gets a "pass" so that the car insurance etc is valid in case of theft etc. The car isn't being driven, but I've seen parked cars still get tickets etc for no valid inspections. Someone suggested going straight through to DSMlink, which may have to be a possibility, but still want to get this car running "right" no matter what.
Thanks for any input!
The car is cammed with revolver cams, has 850cc injectors and a FPR. Car runs TOO RICH at idle and idling a bit low still (800-900). We're trying to get this car to pass an OBDII inspection, but it keeps on tripping this code, p0170 and the o2 and catalyst are never ready.
We reflashed it.. CEL came on after 40 miles. I used the evoscan and found the front O2 wasn't cycling anymore. We replaced the O2 with a generic bosch one, the O2 doesn't respond super fast, but it does change voltage when driving and changing speeds. Is this because it's a crappy sensor, or because the car is still running too rich? I've done some reading, and they point to MAF problems or vaccuum leaks that may cause more of these problems. Not sure what else to do until Jester emails back with a new flash or more solutions. We can boost leak test it tomorrow.
In the mean time, still trying to figure out how to do this OBDII thing. The guy says that the machine reads the VIN while doing this test and I cannot just pull my car up beside it. Yes, I know it's not the "correct" way to do this now. We just want to make sure it gets a "pass" so that the car insurance etc is valid in case of theft etc. The car isn't being driven, but I've seen parked cars still get tickets etc for no valid inspections. Someone suggested going straight through to DSMlink, which may have to be a possibility, but still want to get this car running "right" no matter what.
Thanks for any input!
On private property, ie your driveway, the police can't ticket you.
What voltage does your o2 sensor read at?
heres an example
What voltage does your o2 sensor read at?
heres an example
HTML Code:
volts air/fuel Lambda (open circuit) ===================================== 0.250 15.0:1 1.02 0.375 14.5:1 0.99 0.500 14.0:1 0.95 0.625 13.5:1 0.92 0.750 13.0:1 0.88 0.875 12.5:1 0.85 1.000 12.0:1 0.82
I am not sure if a condo parking lot is considered private property.. Either way, it's going to have to stay there since we have no other way to store it.
As for the O2 readings it will fluctuated from 0.03 volts all the way to 0.9 volts at WOT. The O2 is responding sluggishly, John from Jestr already guessed it right, the car is still waay too rich and the O2 feedback is at 199% most of the time. The rear O2 sensor is still responding very fast and swinging around at the same range, although a little higher normally.
As for the O2 readings it will fluctuated from 0.03 volts all the way to 0.9 volts at WOT. The O2 is responding sluggishly, John from Jestr already guessed it right, the car is still waay too rich and the O2 feedback is at 199% most of the time. The rear O2 sensor is still responding very fast and swinging around at the same range, although a little higher normally.
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I am not sure if a condo parking lot is considered private property.. Either way, it's going to have to stay there since we have no other way to store it.
As for the O2 readings it will fluctuated from 0.03 volts all the way to 0.9 volts at WOT. The O2 is responding sluggishly, John from Jestr already guessed it right, the car is still waay too rich and the O2 feedback is at 199% most of the time. The rear O2 sensor is still responding very fast and swinging around at the same range, although a little higher normally.
As for the O2 readings it will fluctuated from 0.03 volts all the way to 0.9 volts at WOT. The O2 is responding sluggishly, John from Jestr already guessed it right, the car is still waay too rich and the O2 feedback is at 199% most of the time. The rear O2 sensor is still responding very fast and swinging around at the same range, although a little higher normally.
Did You solve Your P0170 problem (?) and how (?)
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Whoops, sorry guys for not replying in so long.... I've moved on and sold my own Evo because I got hassled too much. Sheesh! I'm rocking a modified Legacy GT now.. and low and behold, they don't give a hoot about this plain looking and black (my evo was red).. car.
Anyways, we went to autozone and bought a new O2 sensor. 3 sensors later (lifetime warranty) it started reading okay. What happened in the mean time though: took out the revolver cams, swapped it with someone with HKS 272's. The person we traded with was an experienced tuner.. he finally also sold the revolvers and his car a year later.
We had more changes to the fuel mapping.. found someone that could hex edit it. Things have been running great.
It's Turcotuning for those who are local. He's also sold his evo and got married.. but I'm sure he still tunes. The 7 is running fine, one of these days we're going to up the boost some more and do some more tuning. Right now it's just a regular daily driver for now.. and in the summer my friend takes out his GSXR since it's easier on gas and better for the traffic anyways. I'm in the same boat, I now leave it up to my crotch rocket to provide me fun. The Legacy is modded pretty well, faster than a stock Evo or Sti, but nowhere near any of my old DSM's.
Anyways, we went to autozone and bought a new O2 sensor. 3 sensors later (lifetime warranty) it started reading okay. What happened in the mean time though: took out the revolver cams, swapped it with someone with HKS 272's. The person we traded with was an experienced tuner.. he finally also sold the revolvers and his car a year later.
We had more changes to the fuel mapping.. found someone that could hex edit it. Things have been running great.
It's Turcotuning for those who are local. He's also sold his evo and got married.. but I'm sure he still tunes. The 7 is running fine, one of these days we're going to up the boost some more and do some more tuning. Right now it's just a regular daily driver for now.. and in the summer my friend takes out his GSXR since it's easier on gas and better for the traffic anyways. I'm in the same boat, I now leave it up to my crotch rocket to provide me fun. The Legacy is modded pretty well, faster than a stock Evo or Sti, but nowhere near any of my old DSM's.
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