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Starts smoking bad and stumble bad on acceleration

Tiny
RICHARDBROWN1
  • MEMBER
  • 1992 GMC TYPHOON
  • 93,000 MILES
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
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Friday, September 14th, 2012 AT 5:02 PM

12 Replies

Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
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?
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Friday, September 14th, 2012 AT 5:25 PM
Tiny
RICHARDBROWN1
  • MEMBER
  • 8 POSTS
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
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Friday, September 14th, 2012 AT 6:39 PM
Tiny
RICHARDBROWN1
  • MEMBER
  • 8 POSTS
5volts at map grey 4.73 at midddle wire 1 volt at coolant sensor wire either un plugged or plugged map sensor same.
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Friday, September 14th, 2012 AT 6:43 PM
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
If you have the vin Z, that shows to be throttle-body injection. Idle air control valve on side of throttle-body.
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Friday, September 14th, 2012 AT 7:17 PM
Tiny
RICHARDBROWN1
  • MEMBER
  • 8 POSTS
Yes its Z what do I do with it / how to test it?
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Saturday, September 15th, 2012 AT 12:09 AM
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Here is flow chart for iac.
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Saturday, September 15th, 2012 AT 6:49 PM
Tiny
RICHARDBROWN1
  • MEMBER
  • 8 POSTS
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.
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Monday, October 1st, 2012 AT 11:44 PM
Tiny
RICHARDBROWN1
  • MEMBER
  • 8 POSTS
No response back yet
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Thursday, October 4th, 2012 AT 3:25 AM
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
You'll have to ask somebody else, I don't know what else to yell you?
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Sunday, October 14th, 2012 AT 8:23 PM
Tiny
RICHARDBROWN1
  • MEMBER
  • 8 POSTS
Anyone else know whats wrong with my truck thanks
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Monday, October 15th, 2012 AT 4:05 AM
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Hey, if you make a new post, more people will see it.
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Sunday, October 28th, 2012 AT 6:48 PM
Tiny
RICHARDBROWN1
  • MEMBER
  • 8 POSTS
Any other expert help me with my question thanks
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Monday, October 29th, 2012 AT 6:59 PM

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