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#1
07-13-2006, 03:01 PM
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Fuel Spark No Start
i have a 1995 s10 Blazer v6 Vortec 4.3l. I have Fuel spark timed ignition rebuilt motor and no start. i have spark in all 6 cyclinders, please responde... i am pulling my hair out... Please respond to my email address, [email protected] with any information as to why i have no start thank you.
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#2
07-13-2006, 03:09 PM
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Re: Fuel Spark No Start
Quote:
Which 4.3 engine or what engine code? What is the fuel pressure? Are you getting injector pulse?
__________________
Remember proper testing gives us the answer to many problems. MT
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#3
07-13-2006, 03:34 PM
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Re: Fuel Spark No Start
I don't have a fuel pressure gauge, but i have pressure. I am not sure on teh injector pulse, but when i dump fuel down the top of the phelum (sp) I still have nothing, i do not know the engine code but it's a 1995 with teh new style ignition, the plug wires come of the side of the distributor cap.
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#7
07-13-2006, 04:27 PM
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Re: Fuel Spark No Start
Check to make sure you have compression. If you adjust your vavle lash to tight, your valves may not be closing all the way. Even with hydraulic lash adjusters, you can still tighten them to far.
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#8
07-14-2006, 12:39 AM
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Re: Fuel Spark No Start
Spark timing, are the wire positions correct, compression, make sure your getting a good ground on the chassis, (you never know, it happened on my friends honda). Make sure the ECM is connected fully, no loose connections on the engine. Start trouble shooting. Go and check everything.
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Cant remember who posted it but if you see it give yourself credit Don't ever look at cars as just imports or domestics. Just because a car is made in a certain country doesn't mean that it is anything like another car from that country. An example of this is Mitsubishi reliability, just because they are Japanese doesn't mean that they are as reliable as a Honda or Toyota. Cardomain
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#9
07-14-2006, 11:03 PM
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Re: Fuel Spark No Start
Can you give us more details? Did you rebuild your existing motor or did you swap it out with something else like a rebuilt long block, or a used engine from another vehicle?
You said you have spark at all of the cylinders, I assume the distributor was removed during the rebuild, is it possible that the distributor is 180° out? Bring your number 1 piston to Top Dead Center and pull your distributor cap and make sure the rotor is pointing to the number 1 plug wire terminal. The easiest way to tell that you are at top dead center is to remove the number 1 spark plug and place your thumb over the hole, then gently touch the key to make the starter crank a little at a time. When the number 1 piston is at TDC, you will hear and feel a puff of air coming out of the spark plug hole. (Yes, I know you can also simply look at the timing mark, but the timing mark is also visible when number 6 piston is firing too). If this checks out good, turn the key with the distributor cap OFF and watch the rotation of the rotor. Make sure the plug wires are plugged into the cap in the correct order according to the firing order. I had a friend that put a used engine in a car that was the exact same size engine, but the distributor on the "new" motor rotated in the opposite direction than the old motor. As soon as he switched the wires around on the cap, his engine started.
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"If everyone is thinking alike, then no one is thinking". - Gen. George S. Patton Jr. Last edited by Rick Norwood; 07-15-2006 at 08:37 AM.
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