STARTS SMOKING BAD AND STUMBLE BAD ON ACCELERATION
1992 GMC Typhoon
September, 14, 2012 AT 5:02 PM
Typhoon starts fine idles high then when idles down truck starts smoking bad and stumble bad on acceleration and then dies. Put in new fuel injectors fuel regulator coolant temper sensor map sensor oxygen sensor fuel pump ignition module new plugs wires fuel relay vacum lines checked timing no codes showing
What kind of smoke is it? Is it burning oil, is it trying to flood? Look at the 02 sensor signal, is it running rich or lean? I saw what you replaced, didn't see much testing. What about idle air system?
September, 14, 2012 AT 6:39 PM
Its grey and black I can hold at 3k runs smoooth until it gets to rich and belows out smoke and dies running rich tested throtle positin sensor and map sensor not burning oil no on idle air system is tht big square connector
September, 14, 2012 AT 6:43 PM
5volts at map grey 4.73 at midddle wire 1 volt at coolant sensor wire either un plugged or plugged map sensor same.
September, 14, 2012 AT 7:17 PM
If you have the vin Z, that shows to be throttle-body injection. Idle air control valve on side of throttle-body.
September, 15, 2012 AT 12:09 AM
Yes its Z what do I do with it / how to test it?
September, 15, 2012 AT 6:49 PM
Here is flow chart for iac.
October, 1, 2012 AT 11:44 PM
Put in new idle air valve does same thing idles high then comes down starts stmbling smoking bad then die when given gas not burning oil. Idle air valve old was solid black on end of it.
October, 4, 2012 AT 3:25 AM
No response back yet
October, 14, 2012 AT 8:23 PM
You'll have to ask somebody else, I don't know what else to yell you?