[95Spirit]

You're going to have to tell us what vehicle/engine/trans you have. And the year.

[AC TC]

If you were a registered user, you would not be seeing this!

I guess its a 93/3,0/3 spd voy....
And i think your IAC valve is sticking, my 95 AWD
did however always run a bit odd and stall a couple of times after a battery disqo.

[Bob Lincoln]

It's normal to have a rough idle for several seconds after a battery disconnect, as you have cleared the last settings from the computer as to what the throttle position sensor and AIS were at. But it should be OK after that.

Check fault codes and report back.

[george w]

It sounds like you may very well need to remove and throughly clean the throttle body and the intake plenum area directly behind it. It would also be a good idea that once you've removed the throttle body to remove the AIS motor assy. ( two Torx bolts ) and clean out the idle air passage and the AIS pintle. It sounds like it's sticking as your engine should start and high idle and then drop down to normal in a second or two.

[ImperialCrown]

Idle speed is a learned adaptive value that has to be re-learned after a battery disconnect. It has to learn IAC steps and minimum TPS. I agree that a clean throttle body is a must.

[Ben Hertz]

When was the last time you replaced the fuel filter?

[gustavus]

XX29J9, on Jul 31 2008, 08:47 PM, said:

Other than the apparent drop in gas mileage discussed here, it's been running fine.

However, this is what has happened since disconnecting/reconnecting the battery.

Not needing to use the van, the battery was left disconnected for six hours. After reconnection, the engine cranked over normally and started, but instead of the usual immediate jump to high idle, it went to only about 500-600 RPMs, then climbed to its normal high idle of approximately 950-1,000 RPMs over about a three-second time span. I then put it into drive, pulled forward three car lengths, stopped, shifted into reverse, backed up two car lengths and stopped, at which point it stalled. I shifted into park, started it and it immediately stalled again. I tried again and got the same result. I then let it sit.

Two hours later I tried again, and again it stalled. So, I let it sit for another two hours at which time it started, but did not stall. However, it wasn't a normal start, but another one of those 500-600 RPMs starts with the slow rise to normal high idle. Not wanting to test drive it late at night, I parked it for the night.

Today's first start was another 500-600 RPMs with slow climb version and no stall...until I had gone ~ 0.15 mile, lifted my foot off of the gas pedal at 25 MPH to coast, and when the tach indicated ~ 600 RPMs, it stalled. I shifted into neutral, turned the key, it started, I quickly shifted into drive and lightly gave it some gas so it wouldn't stall again.

For the rest of the test drive it would not stall unless the RPMs were allowed to drop to ~ 600, so unless I was willing to let it stall, I didn't let the RPMs drop below 750, which meant brake-torqueing it at stops. Otherwise, it ran fine, with one possible exception. About 0.5 mile from home while doing 45 MPH with a steady throttle pressure, I felt two "somethings" spaced roughly three seconds apart. I'm not sure if they were slight road irregularities or disruptions in the engine's power flow. If I had to decide which, I'd probably go with the engine experiencing a hiccup.

Other than the battery disconnect/reconnect, NOTHING was done to the van, yet now it won't idle properly as it had been.

What happened? What will cure the problem?

Thanks for your help.

sa








same happens to me and some friend mechanic just told me that he has to clean the inyectors and after that my 94 tc is runing like a champ at 215.000 milles