sim37

94 Mustang GT 5.0L

Good evening all, have a new problem.

I posted earlier about a vacuum line I could not find the end to. Well I managed to get it on and also replaced the vacuum line which controls my a/c vents.

Now when I start it up for a couple of seconds the idle bounces between 1200-800. It settles down and usually the first time I try to get going the car will stall. After I have driven for about a minute it idles normally and does not seem to have any issues.

Any input is appreciated.

sim37

A little more info on the matter.

Also when I shift into reverse or drive it will drop the rpms and have a tendency to stall until I get moving. From a dead stop after a start it does this.

redemption

couldnt be anything, busted o2 sensors, IAc is dirty
throttle is dirty
maf is dirty
vacuum leaks
or rarly ACT is dirty

sim37

And that's all typical of the drop in RPM when I change gears?

89gtwith3.55s

have you installed a CAI? you could be running lean... i had that problem in the beginning i would start and it would idle rlly low bounce a bit then stall but only if the engine was cold

sim37

Yes I do have a BBK CAI. How would I go about checking the mixture?

89gtwith3.55s

check to see if your vacuum lines are intact and check the o2 sensors... i got mine tuned so i really cant help too much sorry =/

redemption

no i meant for idling not changing gears, o2 sensors will jack with you if ones broken or both, but before you buy parts do a koeo test and pull codes it will tel you what sensors are busted