1987 Chevy Blazer truck wont start

1987 CHEVROLET BLAZER
300,000 MILES • 6 CYL • 4WD • MANUAL
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DIANNJAXSON
  • MEMBER
  • 1 POST
I recently replaced the fuel filter ,spark plugs, and the distributor cap how ever now it wont seem to start. it cranks over but wont start. looks like it is not pulsating fuel. any suggestions? is it the fuel relay or the fuel pump? if so is replacing the fuel pump a major job?
Apr 12, 2010 at 11:37 PM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
Do below to determine if its fuel or spark problem.

Get a helper disconnect a sparkplug wire or 2 and ground it to the engine atleast 3/16 away from ground-have helper crank engine over-do you have a snapping blue spark? If so-you have a fuel related problem, check the fuel pressure to rule out the fuel filter/fuel pump/pressure regulator and listen to the injector/s are they pulsing or hook up a noid light. No snapping blue spark continue to troubleshoot the ignition system-power input to the coil/coil packs,coil's resistances,distributor pick-up coil, ignition control module, cam and crank sensors and computer Note: If it doesn't apply disregard it
Apr 12, 2010 at 11:44 PM
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