2000 ASTRO 4.3 NO START!!! Help! - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 12-20-2010, 02:54 PM   #1
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Default 2000 ASTRO 4.3 NO START!!! Help!

I have a 2000 Chevy astro rwd with a 4.3. It cranks but does not start. I have spark at all 6 cyl. I have 62 psi fuel pressure. I pulled the upper intake to ensure I didnt have a fuel leak from the injector spider. I get no codes. Replaced dist cap and rotor. Checked timing. pulled plugs and cleaned. What am I missing!!!??? I am about ready to give up.
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Old 12-20-2010, 03:23 PM   #2
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Does your fuel pressure drop when cranking? How did you test for spark? I'm not 100% but I think if the Cam position sensor goes out on that motor, the fuel injectors won't fire. Do you have a scantool you can hook up? I also remember hearing that if the coolant temp sensor goes out, it will dump way too much fuel and likely not start.
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Old 12-20-2010, 03:26 PM   #3
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I would start with what Jon mentioned.. unplug the coolant temp sensor and see what happens..

do you have fuel in the oil ?
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Old 12-20-2010, 04:51 PM   #4
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Have someone crank the engine and you listen at the injectors. You should hear them fire, will be a click. If no click the injectors are not providing fuel. I'll have to check, but isn't that a VATs issue? So many different ways of handling VATs, some crank, some don't, some fire, and others don"t. I'll check some manuals.
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Old 12-20-2010, 05:03 PM   #5
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The engine cranks but will not start and the Security lamp is flashing

Check your key, try a different key.

The crank sensor is also possible, but check the key first. Both can cause injectors to shut off.
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