Had a quick question about choking on deceleration.

[oricale]

I think I fixed the smoking issue(for the most part and did a few other things for this season)..BUT

I have always had this issue:....Upon releasing the gas pedel and allowing the car to slow itself by the gear with no brake on..and after a bit of deceleration at high rpm's its starts to choke on itself and sputter..all this goes away with a minimal amount of gas pedal.


Any ideas??

[scottfab]

TB plates or IAC sticking.

[oricale]

Actually I dont think the IAC functions correctly...a whileago we disconnected it and nothing happenend!...hmmmm

[XfireZ51]

Choking? What does at mean? Shutting off? Does it happen at a particular mph?

[oricale]

Choking like it cant breath or not getting gas maybe.

not sure of mph...its usually after about 3-5 seconds of deceleration

[tomtom72]

Originally Posted by oricale

Choking like it cant breath or not getting gas maybe.

not sure of mph...its usually after about 3-5 seconds of deceleration

If you have a GM EPROM (?) then the program has DFCO, it's a fuel cut off under compression braking. Could this be what you are feeling? I forget at what rpm it comes "in", but it's closer to idle speed than not, say about 1100 or maybe less....I don't notice it any longer as I guess I'm used to it now. When I first got the car I noticed it right away. Just a thought.


Tom

[Hib Halverson]

Originally Posted by oricale

Actually I dont think the IAC functions correctly...a whileago we disconnected it and nothing happenend!...hmmmm

If you unplug the IAC while the engine's running, it will hold its setting which might seem like nothing happened, at least for a short while.

[oricale]

OK Hib, pull it while its running and leave it off longer?

before when I had a smoke issue, the idle would fluctuate, currently is rock steady at 950 rpm.I thought that was a indication of a nad IAC.

[Fully Vetted]

What was the smoke issue?

[XfireZ51]

What mods on the motor to have a 950rpm idle?