Dies at Idle

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  #1  
Old 04-17-03, 05:41 PM
JackMaster
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Dies at Idle

Working on a 1991 Ford Tempo AWD, 2.3L, Auto w/AC..

Changed the IAC Valve about 6 months ago and it has run perfectly since. The car now dies at sudden stops, or when letting off the accelerator while power braking. It does this interemittently (not all the time). I also notice when increasing the RPM's (while in park) to 1200 and holding it steady, the RPM's fluctuate up & down 100 RPM, like it is surging. Lastly, the Tachometer needle consistently falls to 0 about every 8 seconds, then returns to 800. Is there anything that anyone can suggest that may cause these issues? What about the IPS?
 
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  #2  
Old 04-18-03, 05:13 AM
Joe_F
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Check for vacuum leaks, clean the throttle body and check the IAC again. What brand of IAC was used?
 
  #3  
Old 04-18-03, 10:48 AM
JackMaster
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Hi Joe,

Thanks for the tips.

IAC was aftermarket purchased from CarQuest....I know, I know....OEM.
 
  #4  
Old 04-18-03, 04:00 PM
Join Date: Dec 2002
Location: Connetisuck
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Does it do this with the engine cold also?
 
  #5  
Old 04-18-03, 05:07 PM
JackMaster
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YamahaWolverine....yes it does.
 
  #6  
Old 04-19-03, 03:40 AM
Joe_F
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Jack:

Not necessarily. You could have asked for, or gotten the wrong part. Double check the OEM# on the original versus the listing in the CQ Engine Controls catalog to be sure you've got the right thing.
 
  #7  
Old 04-19-03, 04:27 AM
Join Date: Dec 2002
Location: Connetisuck
Posts: 162
Just a quick check, with the engine running, wiggle the harness going from the TPS back to the harness and the connector near the pass side strut tower. Also visually inspect the wires for any damage. These are good for intermittent open in the TPS circuit.

PS TPS = Throttle position sensor located on the side of the throttlebody
 
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