STARTS SMOKING BAD AND STUMBLE BAD ON ACCELERATION

1992 GMC Typhoon

Tiny

richardbrown1

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

FOUND 2911 RELATED QUESTIONS

12 Answers

Tiny

JDL

September, 14, 2012 AT 5:25 PM

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?

Tiny

richardbrown1

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

Tiny

richardbrown1

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.

Tiny

JDL

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.

Tiny

richardbrown1

September, 15, 2012 AT 12:09 AM

Yes its Z what do I do with it / how to test it?

Tiny

JDL

September, 15, 2012 AT 6:49 PM

Here is flow chart for iac.

Tiny

richardbrown1

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.

Tiny

richardbrown1

October, 4, 2012 AT 3:25 AM

No response back yet

Tiny

JDL

October, 14, 2012 AT 8:23 PM

You'll have to ask somebody else, I don't know what else to yell you?

Tiny

richardbrown1

October, 15, 2012 AT 4:05 AM

Anyone else know whats wrong with my truck thanks

Please login or register to post a reply.

Vacuum Leak Test and Repair - All Cars
Mass Air Flow Sensor Clean Ford Explorer 1995
Mass Air Flow Sensor Clean Toyota Tacoma
Easily Clean Your Throttle Bore Like a Pro