Enging stalling after rev when driving

Twuanev · May 17, 2012

My 2G 95 eagle talon tsi awd has a 6 bolt swap with 1G head,intake, and tb. While driving if I get on the gas around 2500-3000 or higher RPM then let off the car stalls, but starts right back up. I got ECMlink to see what the problem might be (as well as turn off random misfire code) and I would like to know if the problem is with my fuel or something else. My fuel seems to go to 0 fuel flow for about 4/10ths of a sec after I rev (please see attached photos of my logs) so that is why I suspect this. I have already deleted vacuum lins (egr, evap, etc.) and plugged the 4 ports on top of my throttle body. I have also installed a new isc as well. Any help with this would be appreciated!

cl1ckclack · May 17, 2012

my car does the same thing. haven't been able to find the solution. -_-

subscribed.

herms99gst · May 17, 2012

You have a coolant temp. Of 206 degrees and your still in open loop. You almost have to have a vaccum leak after the mas.

herms99gst · May 17, 2012

Have you checked your fpr?

cl1ckclack · May 17, 2012

herms99gst said:
Have you checked your fpr?

thats what i thought it was too... i checked my aero a1000, and it was set really low for some reason. i turned it up but it was no help.... :hmm:

herms99gst · May 17, 2012

So do you have a stock fpr?

MY1GDSM · May 17, 2012

Why not post a log? Hard to say off that limited info in a screenshot... .

Limited info is going to get you limited responses.

herms99gst · May 17, 2012

Its no different than pulling freeze frame data from a scan tool.
Not being a smartass man, just saying.

NHerron · May 17, 2012

This is real easy to do since you have DSMlink to properly adjust the BISS...I would try that first. If the BISS is not set right, the ISC may run out of adjustment range when the throttle is shut and the engine still needs additional air.

http://www.dsmtuners.com/forums/newbie-forum/321158-biss-adjustment-iac-position.html
http://www.dsmtuners.com/forums/newbie-forum/308086-dsmlink-iscposition-q.html

Twuanev · May 17, 2012

herms99gst said:
So do you have a stock fpr?

Yes, I have stock fpr haven't checked it though. Do you think this could be the problem?

MY1GDSM said:
Why not post a log? Hard to say off that limited info in a screenshot... .

Limited info is going to get you limited responses.

Sorry, didn't know that was an option... a little new to this.

MY1GDSM · May 18, 2012

The Ecu cuts Fuel on Decel look at when you Idle switch changes state it if you have a wideband you will see go it lean for a moment till the RPM's drop low enough... .

I don't see a problem in that log. but still not a lot to go off of. you are not Capturing a lot of values.

Your battery voltage,ISC position, all the Fuel trims, Maf Raw, A wideband?

Other then that it looks like a log of someone with a stock car tapping the gas a few times. adding those values would help a bit.

Also getting a log of what is actually happening would help more then sitting parked doing that.

chadillac2820 · May 18, 2012

What maf are you using and is your bov vented to atmosphere?

MY1GDSM · May 18, 2012

Guessing stock 2g as that is what it's set as in ECMlink... .

Twuanev · May 18, 2012

chadillac2820 said:
What maf are you using and is your bov vented to atmosphere?

My BOV is stock, and recirculated. MAF is stock 2G.

MY1GDSM said:
The Ecu cuts Fuel on Decel look at when you Idle switch changes state it if you have a wideband you will see go it lean for a moment till the RPM's drop low enough... .

I don't see a problem in that log. but still not a lot to go off of. you are not Capturing a lot of values.

Your battery voltage,ISC position, all the Fuel trims, Maf Raw, A wideband?

Other then that it looks like a log of someone with a stock car tapping the gas a few times. adding those values would help a bit.

Also getting a log of what is actually happening would help more then sitting parked doing that.

I don't have a wideband, not quite sure how to get the rest of those values. I will post another log of it ASAP getting it cutting out.

herms99gst · May 18, 2012

Stock fuel pressure regulator with a A1000 fuel pump, and you mentioned earlier you have turned up your fuel pressure? Sounds like your over running the fpr and the ecu is cutting fuel.

Twuanev · May 18, 2012

Got some logs could not get it to die out on this run only come close towards the end but if you guys notice anything abnormal in the log let me know...

cl1ckclack · May 18, 2012

herms99gst said:
Stock fuel pressure regulator with a A1000 fuel pump, and you mentioned earlier you have turned up your fuel pressure? Sounds like your over running the fpr and the ecu is cutting fuel.

that was me that turned up the pressure, i have the a1000 afpr, and a 255 walbro pump. my fuel pressure was turned down to 36 for some reason. so i turned it up to 43.5

Twuanev · May 18, 2012

yeah my fuel system is stock

herms99gst · May 18, 2012

O got ya

Twuanev · Jul 26, 2012

Found the solution to my problem! Turned out to be due to my aftermarket intake pipe shape or size I guess. Either way hooked up dsmlink checked idle clamp and waala problem gone! This thread is resolved! :hellyeah:

Tiki2777 · Jul 26, 2012

Twuanev said:
Found the solution to my problem! Turned out to be due to my aftermarket intake pipe shape or size I guess. Either way hooked up dsmlink checked idle clamp and waala problem gone! This thread is resolved!

I have this same problem but I only have ecu flash, can you explain more please?

Twuanev · Jul 26, 2012

I am really not sure how it works but I am thinking the symptoms are similar to having a atmospheric bov. I went ahead and bought dsmlink full because i was running really rich i had done blts over and over and nothing was fixing my problem. I had read up on Idle clamp and in a post tom said this will help if you have aftermarket intake or atmospheric bov so with no other options thats what i did. I checked the idle clamp box left all values stock and it runs perfectly. Check this post http://www.dsmtuners.com/forums/new...tall-when-pressing-clutch-during-braking.html

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Enging stalling after rev when driving

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