1999 5 spd 7.4 dies at idle

I am having a problem with my 5.7 going into a low idle at a stop and occasionally dying. You say that it's fine in the driveway. I'm assuming that it's in park. Mine does well until it's in gear at a stop. Don't know if this info could be a clue. I'm not 'engine savvy.'

 

Mine is a standard trans, but if you figure yours out it may help me.

 

Ok, I have now replaced tps, and iac, still died on me. I have a new maf coming in a few days which I hope is the problem to finally solve this.

 

A Vortec will run without a MAF. The PCM runs in speed density mode.

 

Just unplug it and see how it runs.

 

Do you know anyone with HPTuners or EFILive to do a data log for you? Sucks to keep changing parts and not resolving (I’ve been there tooooo many times). I bit the expensive bullet and got HPTuners, for both tuning the 0411 ECM, and for troubleshooting. Like 454cid said, try unplugging your MAF to see if it does same thing.

 

Apologies, like Steffen and 454 said.

 

Well here's some sh!t, I looked up vin on TIS and truck had been brought in twice for new software to eliminate false egr stuck open p1404. I have not gotten this code but have replaced egr so my next thing will be to run without it plugged in and see what happens.

Unplugging oem MAF it runs the same no difference. Not better not worse.

 

You can probably send your new maf back.