Re: 97 Chev Blazer Fuel/Injector Problem? HELP

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96BLAZERMAN - 12 Nov 2005 04:26 GMT

I HAVE A 96 BLAZER 4.3L AND THE CHECK ENGINE LIGHT CAME ON AND THE DIAGNOTIC TEST CAME BACK WITH P0300 (MULTIPLE/RANDOM CYLINDER MISFIRE). I HAVE REPLACED WIRES, SPARK PLUGS, ROTOR, DISTRIBUTOR CAP,, IGNITION COIL, IGNITION MODULE CONTROL, T.P.S SENSOR, AIR MASS CONTROL SENSOR, AIR THROTTLE CONTROL SENSOR. WHAT I WOULD LIKE TO KNOW IS WHAT ELSE CAN CAUSE MULTIPLE/ RANDOM CYLINDER MISFIRE. THANK YO

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96BLAZERMAN

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nospam@noway.com - 12 Nov 2005 15:46 GMT

> I HAVE A 96 BLAZER 4.3L AND THE CHECK ENGINE LIGHT CAME ON AND THE
> DIAGNOTIC TEST CAME BACK WITH P0300 (MULTIPLE/RANDOM CYLINDER MISFIRE). I
> HAVE REPLACED WIRES, SPARK PLUGS, ROTOR, DISTRIBUTOR CAP,, IGNITION COIL,
> IGNITION MODULE CONTROL, T.P.S SENSOR, AIR MASS CONTROL SENSOR, AIR
> THROTTLE CONTROL SENSOR. WHAT I WOULD LIKE TO KNOW IS WHAT ELSE CAN CAUSE
> MULTIPLE/ RANDOM CYLINDER MISFIRE. THANK YOU

First, lose the caps lock. Second, before throwing hundreds of dollars of
parts at it did you bother to either run a fuel pressure test or change the
$4 fuel filter?

Doc

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Merlin - 12 Nov 2005 16:31 GMT

On mine, it was the fuel pressure regulator causing multiple cyl
misfires, and making the truck hard to start and keep running at idle.
Also had "black cloud" out the exhaust at starat, and smell of
unburned fuel.

>I HAVE A 96 BLAZER 4.3L AND THE CHECK ENGINE LIGHT CAME ON AND THE DIAGNOTIC TEST CAME BACK WITH P0300 (MULTIPLE/RANDOM CYLINDER MISFIRE). I HAVE REPLACED WIRES, SPARK PLUGS, ROTOR, DISTRIBUTOR CAP,, IGNITION COIL, IGNITION MODULE CONTROL, T.P.S SENSOR, AIR MASS CONTROL SENSOR, AIR THROTTLE CONTROL SENSOR. WHAT I WOULD LIKE TO KNOW IS WHAT ELSE CAN CAUSE MULTIPLE/ RANDOM CYLINDER MISFIRE. THANK YOU

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