1996 GMC Sonoma P0300 CYLINDER 6 MISFIRE

Tiny
JUNIOR88
  • MEMBER
  • 1996 GMC SONOMA
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 135,000 MILES
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.
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Wednesday, January 16th, 2008 AT 4:59 PM

3 Replies

Tiny
RASMATAZ
  • MEMBER
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.
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Thursday, January 24th, 2008 AT 4:15 PM
Tiny
JUNIOR88
  • MEMBER
The noise is coming from the engine compartment up near the firewall.
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Thursday, January 24th, 2008 AT 7:31 PM
Tiny
RASMATAZ
  • MEMBER
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.
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Thursday, January 24th, 2008 AT 7:45 PM

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