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2002 Chevy S-10 pickup won't start when wet.

I have a 2002 chevy s-10 pickup, 4.3 V6 vortec, 4 wheel drive. It has developed a crank-no start when it's wet outside. Snow, rain, even high humidity.

Things already done: cap/rotor/wires/plugs; coil; fuel pump (fuel psi between 45-55). There was an issue with the distributor being chewed up by the cam - cam gear was inspected and is supposed to be in good shape. A used distributor was installed by the local shop. Engine has 200,000 miles. I was told the timing chain is a bit stretched but there is no timing problem.

When it is running, it purrs like a kitten. Good power, smooth idle, no smoke and there is no engine codes generated by the crank-no start problem. I have power to the coil when it's happening, fuel in the system, even have a spark out of each cylinder wire but it still won't start.

Anybody out there have any idea? I think the car is possessed!


if you have spark, gas and

if you have spark, gas and timing correct during wet conditions it should start. one of those must fail for the engine not to start. the fuel pump may work but not constant or the ignition must have a failing component.

John, (You said)I have a 2002

John,

(You said)I have a 2002 chevy s-10 pickup, 4.3 V6 vortec,

(You said)(fuel psi between 45-55).

(You said) Engine has 200,000 miles. I was told the timing chain is a bit stretched.

The poppets are gettin hung up. Check out this conversion to MFI below.

http://www.gmpartsdirect.com/

4.3 Vortec CSFI

12568332 V6 MFI Assembly $153.90 Sold as an assembly, not individual injector just buy ONE assembly)

88894355 - V6 Bracket - $18.56
17113215 - V6 Seal Kit - $20.30
7113215 - V6 Seal Kit - $20.30

Also the fuel pressure is too low. The fuel pressure on a Vortec must 60 to 65 PSI. Also make sure there isn't a cylinder compression problem, and 200.000 miles you should replace the timing chain.

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