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Old 03-12-2006, 03:39 PM   #1
ihatemygrandamg
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Vehicle: 1999 Grand Am Gt coupe
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Trouble codes

When I started my car to go to work yesterday, I got a service engine light. So today I went to advance auto parts and scanned it, and here is what the printout read:

DTC (Codes)

P0442
Evap Emission
Control System
Leak (Small)


DTC Pending (Codes)

P0300
Random/Multiple
Cylinder
Misfire Detcted

Any idea of what this could be from? It still drives the same. I changed my plugs a few hundred miles ago with NGK Tr-55's and gapped them right. I also put an FFP ud pulley in but the censor ring was installed right and was lined up so that shouldnt cause a misfire. I have no clue what is causing this? Please help
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Old 03-13-2006, 05:08 PM   #2
digitalballz
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ummm evap may be the gas cap. you have no idea how many gas caps we change at work. Misfire, did you change wires with the plugs?? maybe a bad coil.
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Old 03-13-2006, 07:55 PM   #3
ihatemygrandamg
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Vehicle: 1999 Grand Am Gt coupe
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yea it was the gas cap, I always miss the little things. But Im gonna get new plug wires prolly taylors and maybe some accel coils
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Old 03-13-2006, 08:11 PM   #4
digitalballz
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I installed accel coils over the weekend, nad ALL 3 were bad. I was pi$$ed to say the least.
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Old 03-13-2006, 08:38 PM   #5
ihatemygrandamg
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really? another senior grandam member recommended them to me
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Old 03-14-2006, 05:08 PM   #6
digitalballz
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thats why i went with them as well. guess I just got a bad bunch. When they arrived all 3 coil boxes were destroyed. The big box they were shipped in was fine so I dont think it was the shipper.
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