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twistable_deer
Novice
Jan 23, 2012, 7:23 PM
Post #1 of 9
(2081 views)
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i don't know whats wrong
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hello i have a 2002 pontiac sunfire gt with a 2.2 ecotech engine and it has 180,000 kms. my cylinder head cracked so i replaced it with new gaskets and bolts and its all torqued to specs and when i start my car it fires up quickly but then it idles badly, the rpm fluctuates between 800 to 950 rmp. i used the live data feature on my scanner and the numbers were weird, at idle the numbers for the spark plug advance was fluctuating between zero and 20 degrees and the short term fuel trim was -20%. when i press on the gas the car runs fine and the numbers steady, the spark plug advance stays at 24 degrees and the short term fuel trim stays at 3%. i did find a crack in my intake manifold and i am replacing it but would the intake manifold screw up the timing? also the spark plugs had some black and dry stuff on them, it wiped off easily but is that a major problem?
Thanks
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Hammer Time
Ultimate Carjunky
/ Moderator
Jan 23, 2012, 7:32 PM
Post #2 of 9
(2073 views)
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Re: i don't know whats wrong
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Don't worry about the timing. That's normal.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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twistable_deer
Novice
Jan 23, 2012, 7:35 PM
Post #3 of 9
(2068 views)
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Re: i don't know whats wrong
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i have another sunfire 2003 same engine and i scanned it and it doesn't jump nearly as fast as the 2002 also i did get one code p0300 a random misfire code.
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Hammer Time
Ultimate Carjunky
/ Moderator
Jan 23, 2012, 7:38 PM
Post #4 of 9
(2064 views)
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Re: i don't know whats wrong
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That's what's making the timing jump around. Fix the other problem.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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twistable_deer
Novice
Jan 23, 2012, 7:38 PM
Post #5 of 9
(2060 views)
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Re: i don't know whats wrong
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im sorry what other problem
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twistable_deer
Novice
Jan 23, 2012, 7:51 PM
Post #7 of 9
(2052 views)
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Re: i don't know whats wrong
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well thats where i was hoping you could help me, the coil is fine and the way i check is that i put the coil in my 2002 into my 2003 sunfire and it ran fine i also bought new spark plugs and i am now guessing its some sort of sensor and i was wondering if you have an idea to which sensor i could be.
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Discretesignals
Ultimate Carjunky
/ Moderator
Jan 24, 2012, 6:07 AM
Post #8 of 9
(1988 views)
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Re: i don't know whats wrong
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Which one are you fixing? Your making the thread confusing by adding another vehicle into the equation.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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twistable_deer
Novice
Jan 24, 2012, 7:14 AM
Post #9 of 9
(1981 views)
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Re: i don't know whats wrong
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ohh im sorry i am fixing my 2002 gt.
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