Mechanics

CHEVY

1995 Chevrolet Blazer

Have a 1995 chevy blazer 4.3. Started by producing a p0300 code (random misfire). Started replacing parts 1 at a time with no change. Spark plugs, plug wires, distributor cap, rotor, catalytic converter, plenum gasket, intake manifold gasket. After I changed the intake manifold gasket I didn't set the timing right so the engine backfired. Reset the timing and the engine would not crank. Found a leaking fuel line inside the plenum and replaced it but engine still will not crank. I don't know where to look now.
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Jasonwood1
September 21, 2012.




Check fuses and relay underhood first. See if starter is getting power on the purple wire.

Hmac300
Sep 21, 2012.
It is turning over. It just does not crank.

Tiny
Jasonwood1
Sep 22, 2012.
You mean it turns over but wont' start. Scan for codes and check fuel pressure first

Hmac300
Sep 22, 2012.
Okay here is what I found. No codes are set at the moment. Firing system is doing fine and I'm getting fuel. I'm thinking timing. Does it sound like I'm correct?
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Tiny
Jasonwood1
Sep 23, 2012.
Yu can be getting fuel to the rail bu tnot enough pressure.what is it. There are so many possibilities I suggest continuing the process of elimination you started. I am going to give you 2 diagnostic walk throughs. One for "No Start" and one for "Mis Fires". When they mention pulling codes, testing things like the alternator, battery or staer, etc. and doing tests like fuel pressure, Advance Auto or Auto Zone will pull codes for free and test electrical parts for free. They also have specialty tools and test tools they give out on a loaner basis. So, follow through the walk though as it goes in order for a reason. Just use the links below;

http://www.2carpros.com/articles/engine-misfires-or-runs-rough

http://www.2carpros.com/articles/car-cranks-but-wont-start

Hmac300
Sep 23, 2012.

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