all the sudden wont idle

[icekilla126]

So i installed my 750 cc injectors fuel pump regulator and dsmlink. Car ran like a dream then the weather got a lil colder (may or may not be related) and it wont idle if i push down the throttle it almost always stalls. I pushed the throttle while someone sprayed 2+2 into it and made it worse so it appears to be getting to much fuel.
I have a 3in gm maf sensor close to the intake so do not tell me to do a boost leak test for it would be irrelevant.

I'm thinking a bad maf
i would appreciate your input.

also idle air motor was replaced less then a year ago.

THE FIX: i bought and modified accel 750cc injectors. These injectors are trash they dont spray fuel they squirt it making it harder to ignight(This problem is more noticable when its cold). Bought a nice set of FIC 750cc injectors set the dead time like it says in the manual and it runs perfect.

 

[400hp93talon]

Check your throttle positioning sensor mine just went out and it did the same thing!!

 

[twdorris]

Since you have DSMLink, grab a log showing the behavior and post it up, either here or on our forums. If you don't have a forum account yet, contact me offline.

[email protected]

Thomas Dorris
ECMTuning, Inc.

 

[icekilla126]

swapped the tps still doesnt run good.
also i tried to put a scaner on it wouldnt comunicate with the ecm
possible bad ecm
emailing ecmlink...... now
Has 12volts at obd II port and both grounds

 

[BIRDCLAWTSi]

Look inside the maf, i just had a customer who's car ran like ass and it was a small leaf on the element. Can you get a reading on the g/s (Grams per second)on the maf?

 

[icekilla126]

ill take a look at the maf and grab a log tomorrow.

cant wait to fix it and beat the ballz off it and go threw this whole prosses again

 

[twdorris]

If you have time, go ahead and open the ECU up and check for a blown ISC driver:

ISC driver issue

Thomas Dorris

 

[icekilla126]

did a smoke test no vacum leaks.
can get the car to idle useing dsmlink but only with 1000 deadtime im pretty sure a shouldnt have to do that considering it ran fine when i first put dsmlink in.

once again symptoms are rough idle any time you touch the throttle it has realy bad hesitation at idle or cruising.

need more ideas guys im runing out

 

[LandoAWD]

Post a log.

 

[icekilla126]

heres a log

 

[dsm8883]

I am having close to the same prob but mine revs fine just die's out if i let of the gas. Already replaced the iac motor.

 

[icekilla126]

gonna throw the stock maf on and see if it helps.
cant work on the car till monday when the the snow passes

 

[icekilla126]

resolved fix is at the top

 

[400hp93talon]

When you have ecmlink I dont think you can access your ecu without using the ecmlink software because I cant either!

 

[twdorris]

When you have ecmlink I dont think you can access your ecu without using the ecmlink software because I cant either!

Be sure to check that the "lock in ECMLink mode" checkbox is unchecked in your Misc tab.

Thomas Dorris