1996 GMC Sonoma P0300 CYLINDER 6 MISFIRE

1996 GMC SONOMA
135,000 MILES • 6 CYL • 4WD • AUTOMATIC
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JUNIOR88
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This vehicle had the distributor replaced by a G.M. dealership, due to the cap and rotor melting. Every since then when the vehicle is under load there is a clicking sound from under the hood ,{ mabey the coil control module/ not sure} the ticking noise corolates with the rpms fluctuating and the check engine light coming on. If I floor the ecelerator it goes away, but if I just hold it steady it keeps on struggling until it is under no load conditions. I have had it to several G.M dealers for repair. They say its fixed, then a couple of days later the problems reaccur. Just about everything I can think of has been replaced in the ignition system. Techs. keep on telling us they dont know what to do, meanwhile I still have to pay the big bills.Please help. Thanks in advance.
Jan 16, 2008 at 4:59 PM
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RASMATAZ
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The clicking noise if its not coming from the valvetrain-could be a relay-duplicate the problem and listen upfront and comeback and tell us where the noise is actually coming from.
Jan 24, 2008 at 4:15 PM
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JUNIOR88
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The noise is coming from the engine compartment up near the firewall.
Jan 24, 2008 at 7:31 PM
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RASMATAZ
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Jr.

You need to find it for me in order for me to help-maybe something is making it click rather than the relay is self.
Jan 24, 2008 at 7:45 PM