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Dieseling under lad

Tiny
HONDAGUY
  • MEMBER
  • 1999 CHEVROLET
  • 200,000 MILES
Changed plugs, wires, cap, rotor. Fuel pressure is 55pds. The engine still does this dieseling under load.
Tuesday, August 30th, 2011 AT 3:29 AM

3 Replies

Tiny
DAVE'S BIG BACKYARD!
  • MECHANIC
  • 262 POSTS
Try up grading your fuel it might help. One more thing hook a scaner to it and make sure it dont have any egr codes
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Tuesday, August 30th, 2011 AT 7:13 PM
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
What is model of vehicle, litre size of engine? If you have preignition, can be caused by a hot spot. I thought dieseling was with the key off? Check compression.
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Tuesday, August 30th, 2011 AT 7:57 PM
Tiny
DAVE'S BIG BACKYARD!
  • MECHANIC
  • 262 POSTS
Most newer cars have spark knock under control, unless it has a vac leak or a fuel, or egr flow issue.
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Tuesday, August 30th, 2011 AT 8:41 PM

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