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Old 01-13-2009, 03:21 PM   #1
omgwtf
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My girlfriend has been having some itermittent problems with her 2000 ls2 v6. I pulled the codes today and there are 4 codes. They are:

P0150- O2 sensor bank 2 sensor 1
P0304- Cylinder 4 missfire detected
P0115- Engine coolant temp sensor circuit
P0300- Random multiple cylinder missfire detected

Basically the car is running ruff and has no power. Can anyone help me diagnose the problem here? The car has 103,000 kms (64,000 miles) on it so it shouldn't be due for plugs and wires yet. Could anything else be causing the missfire?

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Old 01-13-2009, 08:08 PM   #2
jonnyrocket92
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ID change the o2 sensor first, and see how that dose for you.
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spoc pa prez.

ex-saturn mechanic.
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Old 01-15-2009, 09:05 PM   #3
omgwtf
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The O2 sensor couldn't cause a missfire though could it?
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Old 01-16-2009, 12:30 AM   #4
vaughn_123
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more than likely its the plugs or maybe wires but I gaurantee plugs after 60000 the 100k plugs usually go due to driving conditions and thats prob the o2 code. the other codes are totally different change plugs first. contact me for further info.
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Old 01-16-2009, 08:30 PM   #5
omgwtf
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Quote:
Originally Posted by vaughn_123 View Post
more than likely its the plugs or maybe wires but I gaurantee plugs after 60000 the 100k plugs usually go due to driving conditions and thats prob the o2 code. the other codes are totally different change plugs first. contact me for further info.

Yeah I figured it was the plugs and wires. New ones are going in tomorrow.
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Old 01-18-2009, 05:29 PM   #6
omgwtf
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Did the plugs and fuel filter yesterday and its still misfiring. o2 and coolant temp sensor will be here tomorrow. Also going to try doing the coilpacks and see if that helps.
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Old 04-02-2009, 05:41 AM   #7
vaughn_123
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has the car run hot anytime? does it consume coolant? any exhaust leaks? a head gasket can be a problem and also a "burnt" vavle could cause a misfire.
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Old 04-22-2009, 07:05 PM   #8
98 sl1 redline
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hello my sl1 was haven the same kind of problems i switch to the e3 diamond fire plugs and it helped. the problem i was haven was an air fuel ratio problem. it took replacen every singel sensor to finaly fix the problem but then the motor died so ya check your sensors that could be the problem
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