1995 Chevy Astro Won't Start

FELIXOJR

MEMBER
1995 CHEVROLET ASTRO
6 CYL
2WD
AUTOMATIC
219,000 MILES

We have a 1995 Chevy Astro van 4.3L that recently had the fuel pump, fuel filter, Distributor cap and rotor, ignition coil, spark plugs, fuel pump relay sensor, all replaced. After all of this the vehicle still won't start, the engine turns but will not start. Computer codes only give a code 12 which indicates nothing is wrong that the computer can detect. Is there some kind of switch that must be reset or can you help point me in the right direction to fix this?

Saturday, June 14th, 2008 AT 9:48 PM

1 Reply

RASMATAZ

MECHANIC
75,992 POSTS

If the engine's condition is in tip top shape-do below to determine if its fuel or spark problem that's if its cranking over and refuses to start

Get a carb cleaner and spray into the carb or the throttle body on an EFI. Did it start and die? If not disconnect a sparkplug wire or 2 and ground it to the engine -have helper crank engine over-do you have a snapping blue spark? If so-you have a fuel problem, check the fuel pressure to rule out the 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, distributor pick-up coil, ignition control module, cam and crank sensors-

If both fuel and spark is present-check the valve and ignition timing, this will lead you to problems with compression and valves opening and closing at the wrong time

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Sunday, June 15th, 2008 AT 9:32 AM