1990 idling
Le Mans Master
Joined: Feb 2000
Posts: 9,715
Likes: 27
From: Kempner Texas
If it idles okay when cold but not when hot, that points to a closed loop problem.
There are a few things that should be checked; using a ScanTool or Diacom will make pin-pointing the cause much easier. It's probably one of the sensors operating out of range.
02, TPS and coolant temp sensor are prime suspects.
Try checking to see if there is any error code stored.
Jake
There are a few things that should be checked; using a ScanTool or Diacom will make pin-pointing the cause much easier. It's probably one of the sensors operating out of range.
02, TPS and coolant temp sensor are prime suspects.
Try checking to see if there is any error code stored.
Jake
Drifting
Joined: Jan 2003
Posts: 1,894
Likes: 3
From: Reading PA.
I'm kinda havin the same problem with my 90 I have a post on a later page. One guy told me to OHM my injectors after it was warmed up. You might give that a try. They should ohm at least 15 ohms give or take an ohm or two. If they ohm alot lower then you might have a bad injector. My car seems to surge after it's warmed up when coming to a stop. And it shouldn't be a fuel filter problem. HOPE YA GET IT STRAIGHTENED OUT.
Drifting
Joined: Jan 2003
Posts: 1,894
Likes: 3
From: Reading PA.
My chip was redone and my fans kick on right away. It doesn't have a problem till it warms up. When my injectors went bad a few yrs. back the hotter it got the worse it ran. It wanted to stall and cut out while running down the highway at speed also. I just finished OHMing the injectors and all were fine. I think I have a vacum leak somewhere.
