cromanyak Posted November 24, 2007 Share Posted November 24, 2007 When I got my truck the cansiter that operates the heater vents was missing. So I got one from a guy on here but when I hooked it up it lowered the idle a good bit, and now when I push the clutch in the idle drops to almost zero and sometimes stalls altogether. Then when I fire it back up the idle shoots up to about 2000 and stays there for a few seconds. Anyone have any idea why it would do this? Chris Link to comment Share on other sites More sharing options...
Pete M Posted November 24, 2007 Share Posted November 24, 2007 Was the vacuum line that you plugged into the vacuum canister plugged before or open? Link to comment Share on other sites More sharing options...
cromanyak Posted November 24, 2007 Author Share Posted November 24, 2007 Before I got the canister it was open. Link to comment Share on other sites More sharing options...
Twisty Posted November 24, 2007 Share Posted November 24, 2007 Check the TPS, and adjust the voltage if necessary. This is what caused the stalling on my truck. Link to comment Share on other sites More sharing options...
Pete M Posted November 25, 2007 Share Posted November 25, 2007 Shot in the dark here, but try unplugging the battery for a while. In newer cars it resets the computer. For the life of me I can't remember if the old 'puters retain anything. What year is your truck? Link to comment Share on other sites More sharing options...
Confedneck Posted November 25, 2007 Share Posted November 25, 2007 battery trick works on obd1 and previous computer controlled vehicles... nothing 96 or newer Link to comment Share on other sites More sharing options...
Eagle Posted November 25, 2007 Share Posted November 25, 2007 The battery trick doesn't work on Renix models, either. (That's 86-90 for the 2.5L and 87-90 for the 4.0L). Every start is a "clean boot." Link to comment Share on other sites More sharing options...
cromanyak Posted November 25, 2007 Author Share Posted November 25, 2007 Yeah mine is an 88. I'll have to check the TPS. I don't think it runs quite right even without the canister hooked up. I know it's running rich because it backfires sometimes. Also the voltage gauge is showing around 16 amps so I need to replace the regulator. I think. Could that be messing the idle? I know someone mentioned something about adjusting the voltage on the TPS. Chris Link to comment Share on other sites More sharing options...
Eagle Posted November 25, 2007 Share Posted November 25, 2007 Before you replace the voltmeter in the dash, check the voltage at the battery with a multimeter. The dash gauges are notoriously inaccurate. The one in my '88 XJ reads about 11 volts, but even when the dealership checked it with their scanner it was actually putting out (IIRC) 13.4 volts -- which is just about right. Link to comment Share on other sites More sharing options...
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