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car wont stay running/horrible missfire

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Old 09-06-2009, 12:28 PM
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Default car wont stay running/horrible missfire

like the title says car wont start, and when it does it runs for 5 minutes at a time then stalls again and wont start, and i notice it wont rev over 4000 without missfiring horribly bad

i have checked fuel pressure when running it is at 59-60psi

pulled relays checked power to my fuelpump and veryfied that it is coming on

what else could be the issue.... maybe cps?? because it seems to be cutting spark and fuel when its not starting it just cranks and cranks

any help is appreciated.... thanks
Old 09-06-2009, 12:42 PM
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Try a fuel volume test while the car is running.You can have good pressure and still have a problem with volume.
Old 09-06-2009, 01:31 PM
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just popped off the intake manifold... looked like the M.A.P sensors rubber bushing got worn out and was leaking because i can see oil sprayed all around it.... im going to silicone it and then if that wasnt the problem I will do the fuel volume test....... is it not unheard of to have a fuelpump fail at 59k miles????
Old 09-06-2009, 02:55 PM
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Originally Posted by 1sick-Z
just popped off the intake manifold... looked like the M.A.P sensors rubber bushing got worn out and was leaking because i can see oil sprayed all around it.... im going to silicone it and then if that wasnt the problem I will do the fuel volume test....... is it not unheard of to have a fuelpump fail at 59k miles????
I have seen them fail with fewer miles then that.But if your map grommet is bad you probably got it figured out.
Old 09-06-2009, 03:48 PM
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If you've got 60lbs it would at least start irrespective of volume. Have you pulled the plugs? Any Codes set?




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