Mechanics

PLEASE HELP: STARTS AND RUNS GOON BUT KEEPS DYEING

1999 GMC Jimmy • 154,000 miles

Hi, Thanks for the last answer, However I am a little confused on the THE answer. You said to go back and start at the Timing Chain AGAIN, dO YOU MEAN TO SET THE CRANK sHAFT gEARS bACK TO THE POSITION THAT THEY WERE FIRST AT? THE BOOK SAYS THAT THEY NEED TO BE AT THE 6 O CLOCK AND THE 12 O CLOCK POSITIONS SO I MOVED It from the 3 o clock to the 6 o clock. It started Right up and drove pretty good, if it was wrong wouldnt not run at all or atleaST RUN BAD? NOW THE dISTRIBUTOR IS A nON aDJUSTING ONE SO WOULD A TIMING LIGHT EVEN WORK ON IT TO SET THE TIMING? AGAIN IT IS A 4.3 lTR. V6 2 WHEEL DRIVE vORTEC MOTOR. PLEASE LET ME KNOW. THANK yOU
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Ginalangston1
August 10, 2012.




The distributor is actually a cam sensor. Timing is controlled by the computer. There is a setting for cam retard but you need a scan tool to monitor this reading.

Did you install new gears and chains?

Did you check for vacuum leaks?

Roy

ASEMaster6371
Aug 10, 2012.


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