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My neighbor has a 00 Z28 with a hard start situation when cold.It happens about twice a week thus far. It turns over fine, but no fire. No codes and no other issues. The plugs have about 10k on them. the two I pulled looked fine. We did the fuel filter with no help. I can hear the fuel pump priming the days I started it. Im still thinking spark or fuel. If the pump checks out,could the relay be bad? Is there anything else I can check?
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99 Formula
05 Explorer

What exactly does it do? Just starts hard after sitting a while? Starts REALLY hard and you have to fight it to get it running? More details would be nice. If it starts hard after sitting a while I would lean towards a pump starting to fail. Try to monitor the fuel pressure at the rail. If it bleeds down over time then you have a pump failing or an injector bleeding down and even a possible leak. Typically when a pump fails it bleeds down into the tank. How many miles on this car?
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00' Trans Am convertible, M6 ,K&N, Edelbrock exhaust. SLP Loudmouth coming soon.

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Posted By: No_snow On: 06-28-2009 @ 10:21:12     Reply | Top | Edit

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Correct,after sitting awhile,like over night, it will turn over for 4 or 5 seconds with no fire. After two or three times of this, it fires and runs normally. The car has 75k on it. I dont have a fuel pressure gauge, I would like her to leave it with a mechanic for a few days and let him try to start it before any parts are changed.
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99 Formula
05 Explorer

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Posted By: TransAm64 On: 06-28-2009 @ 22:17:20     Reply | Top | Edit

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Sounds like a pump, especially if you don't see any leaks.

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00' Trans Am convertible, M6 ,K&N, Edelbrock exhaust. SLP Loudmouth coming soon.

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Posted By: No_snow On: 06-30-2009 @ 13:30:21     Reply | Top | Edit

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gotcha,I will relay that message.
Thanks
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99 Formula
05 Explorer

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