Stalling Problems

[Her94SHO]

I'd like to start by saying this seems like a great site.
Next, My problem I hope to get help with, my wife's stock '94 automatic stalls at low RPM's. It will not idle in park but will when in gear unless I rev past about 1200 rpm. When I let off the gas it will drop to about 500 RPM rebound slightly then die. When driving it will die when slowing down. I've gotten to the point that I have one foot on the brake and one on the gas to keep the revs up. It seems to do fine on the open road and doesn't seem to use more gas on the highway. Any help will be appreciated.

 

[Rio]

I just recently encountered the same problem, but it only happened once. from the responses I got, i'm guessing it is a failing CPS(crank pressure sensor i think).

 

[BeatDaSHO]

it's crank position sensor but that isn't your problem. try resetting your idle program with www.shotimes.com procedure. If that doesn't work, then maybe you should clean out the IAB valve and that can also be found on www.shotimes.com

Greg

 

[projectSHO89]

This does not sound like a crank sensor. If the crank sensor fails, the engine quits firing.

The IAB is the far more likely suspect, since its job is to control the idle. Clean or replace it, then perform the relearn idle procedure.

Steve

 

[Her94SHO]

I cleaned out the IAB and that cured it. The spring seemed a bit weak so I'll replace it but at least I won't leave break pad schrapnel from my house to the parts store.

Thanks a bunch for the help.

 

[Her94SHO]

OK, all is well except I still have a hyperactive Check Engine Light. I ran diagnostics and came up with a green light with the KOEO but with the KOER I get two codes.
One is 176 which says I am running lean on the RH side. First, which side is that? Second, Does that call for replacement of the O2 sensor or is there usually another problem causing the system to run lean?
The other is 632 which I cannot find any information on.
Can anybody help?

 

[luigisho]

I'm not sure if there is a transmission part of the diagnostic test you may have missed for an ATX. Check out the engine codes here http://www.dalidesign.com and bookmark for future reference.

 

[SolidState]

Does the car lurch at all at speed? does it seem to 'slip' a bit?

If so, take it to a tranny shop and have them look at the torque converter.

Just a suggestion.