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2G Runs fine when cold but dies when warm

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mitsumike0

Proven Member
210
46
Oct 13, 2013
Passaic, New_Jersey
Hey all, heres the scoop, post might be a little long so I apologize for that now. Last Friday, not yesterday, I drove my car to the store. It ran completely fine. I was in the store for a little while, long enough for the car to cool down. I then drove to a restaurant that was a short distance from the store. After eating my lunch, I turned on my car to go home. A little ways in to the drive, after my car is warmed up, I noticed something is a little off with the afr gauge. It starts to read super lean, my car loses throttle response and it stalls out. I pull over to try and start my car and it starts up fine but after 2 second it stumbles and dies. I had to get it towed home.
So I thought it was maybe a bad cam angle sensor. I put a new one in on Monday and after installation I go on a test drive. Car started right up and it drive like normal, even building boost no problem. Then after about 10 minutes of driving, the afr goes lean and I lose throttle response again. This time I try to give it some gas, and the car accelerates, but then cuts and eventually ends up dieing again. This time I pulled it into a parking lot and had it cool for a little . The car started up fine again and I drove it down the street a bit for it to ultimately do the same thing its been doing.
So now I'm at a stand still and I don't want to throw parts at it until I have a better understanding of whats going on. The car has a transistor thats 1 year old, ngk wires that are 1 year old, spark plugs maybe have 2k miles on them (br7es) and a new cam angle sensor. Im leaning towards a bad coil pack at this point. I bought it used about 3 years ago. Any one else have any ideas on what it can be ?
 
Coolant temp sensor was reading fine in my car when it runs. It could still be faulty. I'll run the scanner through the car to see if I get anything. When I hooked up ecmlink fuel pressure seemed fine. I have fuel pressure hooked up to record in dsmlink so I can see what's happening. Mdp sensor has been replaced with a 4 bar sensor for speed density so it's definetly not that.
 
Coolant temp sensor was reading fine in my car when it runs. It could still be faulty. I'll run the scanner through the car to see if I get anything. When I hooked up ecmlink fuel pressure seemed fine. I have fuel pressure hooked up to record in dsmlink so I can see what's happening. Mdp sensor has been replaced with a 4 bar sensor for speed density so it's definetly not that.

the omni is faulty... is what im saying
 
the omni is faulty... is what im saying

Im definetly going to look into that as well. My apologies for not listening.

If you can, take a drive while taking a log, then post the log up here. Even if you'd take some pictures of your tune, that'd be cool too.

After I fix this leaking power steering line I'll try to get a log on dsmlink and post it on here. Thanks everyone so far!
 
Alright guys, the new power steering bottle is in and bled. After i finished, i went for a little drive. Cold start was fine and warm cruising was great until i decided to hit some boost. After i went into some boost, the car bucked, it didnt like it at all. I turn right on a side street and the car starts acting up out of boost just like the symptoms discussed earlier.
So after reviewing the log, i think i might have figured out my issue. Just like mountainbike mentioned, i think my omni is toast. If you jump to the 162 second in the log, you see me entering some boost. The omni is supposed to ideally increase , but it cuts in and out. To further back up my theory, jump to the 175 second in the log. Under normal cruising the omni is going nuts. It's cutting in and out even though i am applying steady throttle. So those are my thoughts, any else have ideas after seeing the log?
 

Attachments

  • diagnostic log.elg
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How about the connector itself? Maybe one of the wires is loose and cutting out sporadically. I had that happen on a MAP connector. Just a thought before you buy a new omni. Can you just stick the old sensor back on there and test it to verify the problem?
 
Alright guys, the new power steering bottle is in and bled. After i finished, i went for a little drive. Cold start was fine and warm cruising was great until i decided to hit some boost. After i went into some boost, the car bucked, it didnt like it at all. I turn right on a side street and the car starts acting up out of boost just like the symptoms discussed earlier.
So after reviewing the log, i think i might have figured out my issue. Just like mountainbike mentioned, i think my omni is toast. If you jump to the 162 second in the log, you see me entering some boost. The omni is supposed to ideally increase , but it cuts in and out. To further back up my theory, jump to the 175 second in the log. Under normal cruising the omni is going nuts. It's cutting in and out even though i am applying steady throttle. So those are my thoughts, any else have ideas after seeing the log?


yea, double check the wires, if it was wire it would happen hot or cold, but slap a new sensor on for now and the problem should go away!!!!
 
Alright guys, the new power steering bottle is in and bled. After i finished, i went for a little drive. Cold start was fine and warm cruising was great until i decided to hit some boost. After i went into some boost, the car bucked, it didnt like it at all. I turn right on a side street and the car starts acting up out of boost just like the symptoms discussed earlier.
So after reviewing the log, i think i might have figured out my issue. Just like mountainbike mentioned, i think my omni is toast. If you jump to the 162 second in the log, you see me entering some boost. The omni is supposed to ideally increase , but it cuts in and out. To further back up my theory, jump to the 175 second in the log. Under normal cruising the omni is going nuts. It's cutting in and out even though i am applying steady throttle. So those are my thoughts, any else have ideas after seeing the log?

also here is my thread, from the same problem, and you can see i kinda figured it out on my own---- http://www.dsmtuners.com/threads/2g-dsm-dies-when-warmed-with-ecmlink-logs.512948/#post-153656006
 
Last edited:
Alright guys, the new power steering bottle is in and bled. After i finished, i went for a little drive. Cold start was fine and warm cruising was great until i decided to hit some boost. After i went into some boost, the car bucked, it didnt like it at all. I turn right on a side street and the car starts acting up out of boost just like the symptoms discussed earlier.
So after reviewing the log, i think i might have figured out my issue. Just like mountainbike mentioned, i think my omni is toast. If you jump to the 162 second in the log, you see me entering some boost. The omni is supposed to ideally increase , but it cuts in and out. To further back up my theory, jump to the 175 second in the log. Under normal cruising the omni is going nuts. It's cutting in and out even though i am applying steady throttle. So those are my thoughts, any else have ideas after seeing the log?
Any update on this?
Did you ever get it running right?
 
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