Thread: car rattles after cam install then wont start at all!

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  1. #1 Re: car rattles after cam install then wont start at all! 
    Donating Users chrisb's Avatar
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    when it dies timing starts to dip and and it will slowly die. case learn was done right after the install. i had it tuned before i put the cam in with higher timing tables and maf tunning.
    the cylinders have compression i can feel it when i turn it over im thinking the starter was stuck on the flywheel some how cause it to lock up but i was able to break it loose by turning it over. car does run but very rough and doesnt stay on more then 3 to 4 mins. during all of this rpms are bouncing all over the place.

    ill see if i cant get a scan tom if i still cant find the promblem
    99 Grand Prix old build- CAI, Custom exhaust, HV3, Stage 2 TB, custom tune, ported heads intense s1x cam, headers.
    Nothing great Just a small T66 Turbo with a Hv3 On a stock tranny untill i finish the other one.
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  2. #2 Re: car rattles after cam install then wont start at all! 
    TDCRacing
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    Quote Originally Posted by chrisb View Post
    when it dies timing starts to dip and and it will slowly die.
    That may be normal due to ''other problems'' that we havet figured out yet. The pcm is going to command how much timing the engine needs to run. Unless it's been changed.Thats why i suggested to change the high and low octane tables back to stock. so we can over look that.
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  3. #3 Re: car rattles after cam install then wont start at all! 
    TDCRacing
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    Quote Originally Posted by chrisb View Post
    car does run but very rough and doesnt stay on more then 3 to 4 mins. during all of this rpms are bouncing all over the place.
    bouncing all over the place...like what are we talking here? what rannge i mean? 800-1600? also when does the car die? at idle? and for the record. does the engine turn freely right now? If you dont know take the plugs out and turn it by hand just incase something is messed up internally.Exclude the starter-no way that would cause it.
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  4. #4 Re: car rattles after cam install then wont start at all! 
    Donating Users chrisb's Avatar
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    heres the three codes it did set, car is in the garage and is going to be torn down to find the promblem.

    [PCM] P0171 - Fuel Trim System Lean Bank 1 (Old) (Immature)
    [PCM] P0620 - Generator Control Circuit Malfunction (History) (Immature)
    [PCM] P1133 - HO2S Insufficient Switching Bank 1 Sensor 1 (Old) (Current) (Immature)
    99 Grand Prix old build- CAI, Custom exhaust, HV3, Stage 2 TB, custom tune, ported heads intense s1x cam, headers.
    Nothing great Just a small T66 Turbo with a Hv3 On a stock tranny untill i finish the other one.
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  5. #5 Re: car rattles after cam install then wont start at all! 
    TDCRacing
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    What are your FT's doing when you have the scanner up and running? At idle at PT. Avacume leak could also make the car stall and hard to start...not turn over...depending on the size of the leak.
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