Dies unless giving gas
Dies unless giving gas I'm stumpped. Runs good once warm but dies after a good rev 4k or above it'll die when coming back down or sputter real bad V2 cam ported heads 36 lb injectors th350 4500 stall very strong just don't want to run after I hit the key with out a little gas I have a mail order tune. Any sujections? I'd love to hit this thing lined out... One warm it'll it'll but surge some times no egr 85mm intake to vacuum leaks i can find.
Do not drill your tb.
My bet is your tune is not using the iac correctly. I had this problem from a crappy dyno tune I paid big money for. Took it to a different tuner and he said my iac tables had been zeroed out or in some cases the iac was not following the rpm or tps (not sure which) which meant that the iac could not jump quickly enough to provide a soft landing for the transition back to idle.
Iac is meant to handle idle and smooth out when the throttle is abruptly chopped. Sounds like your mail order tune is closer than my first dyno tune...which was also my experience as I had a frost tune first.
My bet is your tune is not using the iac correctly. I had this problem from a crappy dyno tune I paid big money for. Took it to a different tuner and he said my iac tables had been zeroed out or in some cases the iac was not following the rpm or tps (not sure which) which meant that the iac could not jump quickly enough to provide a soft landing for the transition back to idle.
Iac is meant to handle idle and smooth out when the throttle is abruptly chopped. Sounds like your mail order tune is closer than my first dyno tune...which was also my experience as I had a frost tune first.
10 Second Club
Joined: Jan 2010
Posts: 2,317
Likes: 20
From: Hurley, VA
I had a Torquer 2 on a mail order. It acted exactly like a small block with no choke. If I kept it running for 20 or so seconds it would take off and run fine. If you can't find any vacumm leaks and you've got no codes I'm betting tune. Call whoever done the mail order and talk to them about it. See what they say.
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