idle and stumbles

1995 CHEVROLET SUBURBAN
250,000 MILES • V8 • 2WD • AUTOMATIC
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BATTT191
  • MEMBER
  • 1 POST
Won't idle and stumbles alot.Seems choked up when I start it every time but smooths out . No problem starting. Had code 35 so I replaced IAC valve but no change. No chek eng. light on
Jun 14, 2011 at 12:37 PM
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JDL
  • ✓Experienced Mechanic
  • 16,098 POSTS
How long since a tune-up? Take the throttle-body off and clean it. Use a gage and check fuel pressure. Are both injectors throwing out a similar spray pattern?

I haven't looked at the code. Any code just says that the computer thinks there is a problem on that system. Doesn't tell you what to replace.
Jun 14, 2011 at 1:24 PM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
To add on-DTC35 idle speed error-try cleaning out the EGR and PCV valves and test the TPS and MAP sensors
Jun 14, 2011 at 2:23 PM
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