Help, need some ideas. car keeps stalling when I come to stop or slow down abruptly..

[Yooformula]

For whatever reason, since it got warm out the last day or so the car has been stumbling and had a rough idle when I come to a stop. Today for whatever reason the damm thing would stall when I would come to a stop light or slow down to make a sharp turn. This was going on with/without the a/c btw. Any ideas? plugs looked fine, air filter and maf were clean.

[0TransAm0]

will it idle at all in park? or is it just when you are driving?

[Yooformula]

it will idle in neutral but the idle is sometimes all over the place. the problem almost always happens when slowing down or coming to a stop and I take it out of gear.

[Reverend Cooper]

vacuum leak some wher?

[GTSLOW]

What kind of car? :goof

[Prince Valiant]

any CEL's?

[Coops Brother]

Stuck open EGR?

[Karps TA]

TPS sensor out of whack?

[wrath]

Does it do it when it's cold?

[Reverend Cooper]

im with brian egr sounds good

[Bobby "Big Daddy" Flay]

mass air flow?

[Yooformula]

no cel lights at all, there is no egr system and the symptoms only occur when its warmed up.

[wrath]

Sounds like a MAP sensor to me.

[TraceDaddy]

Weird. I'm having the same issue.

I had an earlier thread where I was running lean. Took it to Marv and he cleared that up, pumped up output a bit and it runs great once the RPM are above 1200 or so. I haven't stalled completely, but when I first depress the clutch, RPM will drop to below 500. If I sit for a while it'll bounce back up to around 750 (where it should be) but it'll waiver a bit.

My plugs, air filter and MAF are clean as a whistle as well. Marv sent me a slightly modified version of the tune. Hopefully I can try it out tonight before ball. If it works I'll find out what he did.

[MoCkiN U]

i was having a similar issue in my stang and found out then when cleaning the engine bay the day before I had knocked the sensor plug off the MAF sensor and didnt even realize it. Car would spit and sputter and stall when stopped.

[TraceDaddy]

If that happens on my car it won't even start. I know this. After replacing the intake tube I forgot to reconnect it once.

[Yooformula]

wtf! cleaned out the iac and now the fucker wont idle less than 1500 rpms!

[BadAzzGTA89]

Did you take it out to clean it? The IAC sounded like the problem.

[BR3W CITY]

how did you clean it?

When I had my srt4 the iac would disconnect and cause all sorts of idle and a/f problems. If you used a harsh chemical maybe it damaged it?