This is topic tried all this didnt work. what else ? in forum Tech Talk at Northern California Ford Owners .
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Posted by blk01snake (Member # 8848) on
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4v sputtering under accelleration, put new fuel filter, spark plugs, checked 02s just in case, injector cleaner, and i always use 91 octane. cant find where there could be a vacum leak.......suggestions? ...thanks !
Posted by Blind (Member # 3052) on
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how much vacuum does it pull at idle?
Posted by blk01snake (Member # 8848) on
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dont have a vacum gauge how else can i check that i mean iam sure its a vacum leak i just cant find where i prayed ether near all the possible places i thought it could be and nothing the rpms stayed the same and like i said it only does it when i give it gas
Posted by Blind (Member # 3052) on
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my 4v had a vacuum leak at the egr gasket (it was torn) and behaved the same, ran like shit part throttle, drove great full throttle, and idled perfect. Drove me crazy until I found that when I was tearing the intake manifold off to check everything.
Posted by S351-R (Member # 1605) on
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You may have to bite the bullet and take it into a shop unless you have or can borrow a fuel pressure gauge, but check fuel pressure under load. A weak fuel pump can show good fuel pressure at idle but will drop off under load and can cause the vehicle to sputter.
[ July 23, 2009, 03:14 AM: Message edited by: S351-R ]
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