I have a 89 S-10 4.3 and it backfires through throttle body
10

Asked by belijr Jul 06, 2018 at 02:00 PM about the 1989 Chevrolet S-10 RWD

Question type: Maintenance & Repair

89 S-10 backfires through throttle body lack of power at acceleration and
service engine light comes on after a while  I've checked timing plugs and wires
and did a diagnostic test and it showed nothing please help

2 Answers
103,215

KenF answered 6 years ago

Given the age (and miles?) backfiring can be any number of issues. You say you checked timing, have you checked for slack in timing chain? Dist. cap and rotor? Pick up coil? Ignition module? How does it idle?

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10

belijr answered 6 years ago

I check rotor and dist cap also and Idle is good at first but after driving about 5 to 6 miles it feels like it wants to die at stop lights and then when I go it chugs and if I keep at a low speed and light on acceleration it does fine until I hit it

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