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Vechile only runs rough for approx. 30-450seconds then will run fine?

Tiny
TRENTW
  • MEMBER
  • 2000 CHEVROLET S-10
  • 132,000 MILES
2000 s10 blazer 4x4 132,000 miles 4.3 cyl replaced fuel filter, spark plugs, spark plug wires, distribitor cap and rotor, fuel pump replaced 1 yr ago, need suggestions?
Friday, September 30th, 2011 AT 2:22 AM

6 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,535 POSTS
Check for vacuum leaks. Make sure the EGR is working smoothly and not carboned. If the check engine light has come on, have the computer scanned. Most parts stores will do it for free.
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Friday, September 30th, 2011 AT 2:25 AM
Tiny
TRENTW
  • MEMBER
  • 4 POSTS
There are no codes in obd, thoght possible coil or fuel pump pressure? Pump is noisy
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Friday, September 30th, 2011 AT 2:29 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,535 POSTS
If the pump is noisy, you could be right. Actually, check fuel pump pressure and fuel pressure drop off. When you shut the key, it should hold pressure for some time. If it drops quickly, there is either a leak in the fuel system, a leaking injector, or the pump is allowing it to back feed.
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Friday, September 30th, 2011 AT 3:11 AM
Tiny
CJ MEDEVAC
  • MECHANIC
  • 11,004 POSTS
MIGHT WANNA LOOK FOR MOISTURE UNDER THE DISTRIBUTOR CAP TOO

BE SURE YOU LET US KNOW YOUR RESULTS

THE MEDIC
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Friday, September 30th, 2011 AT 3:53 AM
Tiny
TRENTW
  • MEMBER
  • 4 POSTS
Hey! Cleaned egr valve and that seemed to do the trick! Thanks for all of your reply's, trent
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Wednesday, October 5th, 2011 AT 12:35 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,535 POSTS
Glad you got it fixed.
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Wednesday, October 5th, 2011 AT 12:44 AM

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