rough running

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06-28-2006, 12:29 AM

hawd01

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Join Date: Jun 2006

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rough running

HI, I HAVE A 1997 4DR 4X4 BLAZER. I PURCHASED IT IN 2001. UNTIL THIS YEAR I HAVEN'T HAD ANY MECHANICAL PROBLEMS. EARLIER THIS YEAR AROUND JANUARY MY FUEL PUMP WENT OUT. OF COURSE YOU KNOW IT NEVER HAPPENS AT HOME. I REPLACED THE FUEL PUMP AND FILTER AND THE VEHICLE HAD BEEN RUNNING GREAT. ABOUT 3 WEEKS AGO IT STATRTED RUNNING REALLY ROUGH. I TUNED IT UP LAST WEEK INCLUDING ALL THE OXYGEN SENSORS @ $52 BUCKS X 3. BUT IT STILL RUNS ROUGH. I AM AT A LOST WHERE TO GO NEXT DOES ANYONE HAVE A IDEA ABOUT WHAT IS HAPPENING. THANKS, HAWD01

06-28-2006, 01:27 AM

1996BZR

Join Date: Mar 2006

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RE: rough running

maybe clogged injectors

06-28-2006, 11:51 AM

DINO55

Join Date: Mar 2006

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RE: rough running

Quote:

ORIGINAL: hawd01

HI, I HAVE A 1997 4DR 4X4 BLAZER. I PURCHASED IT IN 2001. UNTIL THIS YEAR I HAVEN'T HAD ANY MECHANICAL PROBLEMS. EARLIER THIS YEAR AROUND JANUARY MY FUEL PUMP WENT OUT. OF COURSE YOU KNOW IT NEVER HAPPENS AT HOME. I REPLACED THE FUEL PUMP AND FILTER AND THE VEHICLE HAD BEEN RUNNING GREAT. ABOUT 3 WEEKS AGO IT STATRTED RUNNING REALLY ROUGH. I TUNED IT UP LAST WEEK INCLUDING ALL THE OXYGEN SENSORS @ $52 BUCKS X 3. BUT IT STILL RUNS ROUGH. I AM AT A LOST WHERE TO GO NEXT DOES ANYONE HAVE A IDEA ABOUT WHAT IS HAPPENING. THANKS, HAWD01

What all was included in your tune up besides new 02 sensors?
Is the SERVICE ENGINE SOON light on?
Did you clean the EGR?
Did you clean the MAF?