First log.. Wont stay running

[RocCitySlayer]

This is the first log I took. Its only like 10-15 seconds long because the car wont idle by itself. If there is any thing anybody can pull out of this log that could make this happen please help

P.s I had to keep pressing the throttle to keep the car running
it goes from rich to lean back and fourth but when i let off the pedal completly it dies out

 

[motozachl]

Lock it in closed loop and do another log. O2 sensor not cycling

Actually nevermind that you have an 'idle control system malfunction'

When you put the 1g head on what throttle body did you use? Swapped sensors as well?

 

[RocCitySlayer]

Lock it in closed loop and do another log. O2 sensor not cycling

Actually nevermind that you have an 'idle control system malfunction'

When you put the 1g head on what throttle body did you use? Swapped sensors as well?

Im not sure, It was like that when i bought the car. How can I find out? And what causes a idle control malfunction?

 

[Calan]

Lock it in closed loop and do another log. O2 sensor not cycling

There does seem to be a front O2 sensor issue, but you can't lock the ECU in closed loop. You can only lock it in open loop.

OP - Your ISC is either maxed out or not working, and there is a DTC for it. Check the ISC coil, and make sure everything in the throttle path is adjusted properly and there are no vac leaks.

 

[RocCitySlayer]

OP - Your ISC is either maxed out or not working, and there is a DTC for it. Check the ISC coil, and make sure everything in the throttle path is adjusted properly and there are no vac leaks.

How do i check the ISC coil? Im hoping to get this situated soon., I have no CEL btw. I just can't get the car to idle. I'm not sure if this matters but under ecmlink my Tps is -7 and the Tps scale it at 104%

 

[Calan]

Here is one page; there are a lot of them out there...just do a bit of searching.

You should also download the FSM (factory service manual).

 

[RocCitySlayer]

Here is one page; there are a lot of them out there...just do a bit of searching.

You should also download the FSM (factory service manual).

I have a haynes manual. But its all factory specs..

 

[Calan]

I have a haynes manual. But its all factory specs..

Which is different than...

You should also download the FSM (factory service manual).

 

[RocCitySlayer]

Does this seem right? Tps is -7 and the Tps scale it at 104%

 

[snowborder714]

You don't need to be worrying about the TPS offset at the moment. You need to start off by testing the ISC.
http://www.dsmtuners.com/forums/art...-motor-testing-replacement.html?highlight=ISC

Also, did you remember to swap the spark plug wires?
swapplugwires [ECMTuning - wiki]

 

[RocCitySlayer]

Im going to try to test it in alittle bit, but if thats not the problem then what else could it be?

 

[snowborder714]

One step at a time. If that tests out to be fine, then we can take it from there.

Also, make sure a boost leak test like Craig suggested.



And if you haven't done so, you should recirculate that bov.

 

[RocCitySlayer]

One step at a time. If that tests out to be fine, then we can take it from there.

Also, make sure a boost leak test like Craig suggested.



And if you haven't done so, you should recirculate that bov.

I tested for boost leaks and my turbo to manifold was leaking but its fixed now after my turbo project i was working on. My bov is circulated, And I know that my tune is way off...

 

[snowborder714]

I would also zero out your MAF Comp sliders and the global scalar for it. Unless you know that is correct. The negative MAF Comp values and the positive global will just cancel each other out for the most part.

 

[Calan]

I tested for boost leaks and my turbo to manifold was leaking

That would be an exhaust leak unless I'm missing something (which is also important to find and fix), but did you check for boost leaks?

Exhaust leaks = hot side of turbo, boost leaks = cold side of turbo.

 

[RocCitySlayer]

finally got the car to run and idle by itself 'after alittle help' here is my newest logs. This is all at idle and it revved a few times. it still isnt running right and I need help. Im afraid to drive it so its been sitting in my driveway.

Ps. The logs I took didnt save for some reason

 

[snowborder714]

I would also zero out your MAF Comp sliders and the global scalar for it. Unless you know that is correct. The negative MAF Comp values and the positive global will just cancel each other out for the most part.

As well as - did you test your ISC yet?

 

[Calan]

I'm not seeing it "idle by itself" in that log. Looks like you had to keep stabbing the throttle to keep it running.

 

[RocCitySlayer]

As well as - did you test your ISC yet?

Yea it tested out fine. I didn't zero them out I forgot about that. I seen it and it was set at 10.9

 

[RocCitySlayer]

I'm not seeing it "idle by itself" in that log. Looks like you had to keep stabbing the throttle to keep it running.

I had a log about 5 minutes long but it did not save to my computer. I'm charging it now and I will try to do another one in alittle bit

 

[Calan]

FYI - You need to log battery voltage (always).

Brian - Shouldn't he be seeing an IdleSw signal, even though it's a 2G with the TPS-integrated/simulated idle switch?

It looks like the ISC is fighting a loosing battle with the surge in airflow, as it just swings further and further out (or the ECU can't control it accurately for some reason). But, it's hard to tell for sure until we see a more steady idle log without throttle inputs.

Are you sure you have no boost leaks, and that all of the mechanical TB adjustments are done correctly?

 

[snowborder714]

I would think so, especially with having the simulate on and with low TPS values.

 

[Calan]

I would think so, especially with having the simulate on and with low TPS values.

My thoughts exactly. I wonder if the TPS is flaky? (I don't think that would explain everything going on though).

 

[snowborder714]

But it's registering in the log, so I wouldn't expect it to be bad. But it couldn't hurt to at least test it if he can.

 

[RocCitySlayer]

longer log