2000 Chevy Blazer bucking and jerking a lot

Tiny
2CP-ARCHIVES
  • MEMBER
  • 2000 CHEVROLET BLAZER
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 59,000 MILES
2000 Chevy Blazer mileage 59,000: My Blazer has been bucking and jerking a lot lately. It's a 5 speed. Bucks and jerks as you gain rpms in each gear. It usually starts at around 1800-2200 rpms, but varies. I have had the service engine light come on a few times and then it goes out after a while. I’ve tried new plugs, wires, distributor cap and rotor. I took it to the Chevrolet garage and they said it was a fuel pressure regulator leaking and replaced it at $382 and it is still bucking and jerking. They then said it had plugged injectors they were cleaned twice and still jerking. They said the codes said cylinders 1, 3, 6 were misfiring. They said bad gas they dropped the tank and cleaned but then they said it wasn't the gas after all as the tank was clean. They replaced the fuel pump after breaking the sending unit on it and replaced the fuel filter. It is still bucking and jerking the service engine light came on again. They said codes say cylinders 1, 3, 4, 6 are misfiring now it needs injectors in all 4 cylinders. Would this be correct as it sometimes seems to run GREAT and other times it bucks and jerks. I'm at a loss as the Chevrolet garage “seems” to be guessing now and it is getting costly for a “no fix” so far $643 for the 4 injectors replaced if it needs it as they say it does. Any suggestions?
Tuesday, November 9th, 2010 AT 7:37 PM

1 Reply

Tiny
2CP-ARCHIVES
  • MEMBER
  • 4,540 POSTS
We assume that you have been getting erratic gas mileage based on the description of your problem. After scanning the computer, we also would have replaced the fuel pressure regulator and yours was more likely than not faulty. Because your problem persists replacing the fuel injectors would be the next step.
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Tuesday, November 9th, 2010 AT 7:39 PM

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