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bad sputters


86foxbody
06-19-2008, 12:03 AM
hey im having a little tubble with my 86 mustang it has a new cam it sputters when trying to accelerate and when i take a turn at normal speeds it wont accelorate then the exsost will backfire or pop then its back to normal i talked to friends some said fuel pump and some didnt think it would cause it i dont know so any suggestions thanks

rustysurfsa
06-19-2008, 03:58 AM
if you have a carburator it could be flooded.

86foxbody
06-19-2008, 12:28 PM
its fuelinjected

351wStang
06-20-2008, 02:18 AM
In 1986 the EFI on the mustangs was Speed Density, run by a map sensor. The SD cars do not take well to modifications. What cam did you put in it? The computer is not programmed for the cam change and is either feeding way to much fuel causing it to load up at part throttle or not enough fuel causing it to go lean and stumble.

86foxbody
06-21-2008, 03:36 PM
yeah that sounds about right but the guy before me put it in and i have no clue what cam it is but how would i adjust it to get rid of the problems

351wStang
06-24-2008, 04:22 AM
You would have to take it to a dyno shop and have a custom tune run on it.

86foxbody
06-24-2008, 10:33 AM
o ok i was talking to my friend and he was saying to drill a quarter inch hole into the throttle body

351wStang
06-29-2008, 11:28 PM
That will just give it more air at idle.

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