Idle issues need help
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Newbie
Joined: Jun 2007
Posts: 16
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From: san diego
Missfire code could just be associated with the poor starting. If it was calling out a specific coil that would be different, but random makes me think it's more of a symptom. When ever I get a random missfire, its been associated with my fuel tuning. It sounds like your tuner thinks your thermostat is getting stuck open and letting the motor flood with cold coolant, making it read cold and spike fuel. Could be, that would show up in the log, before cranking it would read hot, and then you would see the temp drop quickly.
Ya I replaced the thermostat no difference and replaced the blow off valve with OEM no difference. It's not intermittent anymore either. It's all the time. At idle the car is missing. Have issues like when I roll the window down idle will drop and almost die. I will be sitting at stop lights and idle will randomly drop and almost die then rev up. It does it cold start and hot. The missing at idle and stuff. The car ran completely fine before I did the work to it in reference to the coils and stuff but I know it could also have randomly gone out just randomly too. The thing is when I am out of gear like coming off the freeway when it drops down to almost idle speed I don't see it missing.
Thread Starter
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Joined: Jun 2007
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From: san diego
I've thought about maybe because I didn't drill out my return line but I would assume my tuner would have noticed an issue with the fuel pressure? I'm not sure if that's something that can be monitored through the tuning software
Thread Starter
Newbie
Joined: Jun 2007
Posts: 16
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From: san diego
Is there anything that I can check on the mechanical non tuning side before I get it retuned. I am contact with a different tuner but I want to make sure there is nothing else mechanically I need to check. Thank you
EvoM Community Team Leader
Joined: Aug 2005
Posts: 5,690
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From: West Coast
You could check the pre-cat oxygen sensor to make sure it isn't fouled. You probably would have heard it, but you can also check for pre-sensor exhaust leaks.
Last edited by Biggiesacks; Apr 5, 2022 at 06:54 AM.
Thread Starter
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Joined: Jun 2007
Posts: 16
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From: san diego
Ya I replaced that O2 sensor with an oem Mitsubishi one. I've checked and replaced the exhaust gaskets. I will look at them again. Also made sure my sensors were tight. Thank you for the suggestion
Thread Starter
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Joined: Jun 2007
Posts: 16
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From: san diego
It definitely sounds like a tractor since I swapped everything over. I've checked and replaced the exhaust gaskets 3 times now. I don't know if that's the reverbation from the straight exhaust now. I messed with the fuel line but that didn't change it. I'm running ultimate racing downpipe and midpipe no cat
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