Bad injectors?????????

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Oct 11, 2011 | 08:32 PM

Duderoy

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Tuned

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Bad injectors?????????

My 95' f-150 ,,, 5.0L has a problem. Runs like total crap now. At 1/4 thru 3/4 throttle almost no power increase and a hesitation. Clears out at full throttle but almost no power. Full throttle just to maintain 75 mph. Comp. shows no codes, I've ran countless bottles of injector cleaner thru it and no change. New plugs, wires, cap, and rotor. Gas mileage sucks. I need help with this thing. What are the symptoms of bad injectors and what does it take to replace them? Truck has 108K miles. thanks, Dan.

Oct 11, 2011 | 08:40 PM

Terpfords

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If i had to guess I'd say clogged cats.

Oct 11, 2011 | 08:43 PM

Duderoy

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Tuned

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I thought of that to. I might cut out cat and put in straight pipe, but not sure what to do with smog BS.

Oct 11, 2011 | 08:46 PM

Blurry94

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From: Calhoun GA

I don't think I've ever seen all the injectors go bad at once. Try putting a vacuum gauge on it to see if there is a leak. That or just check all of the connections to make sure they're good and make sure the lines haven't cracked...that'd be a start.

Oct 12, 2011 | 04:19 AM

rla2005

Fleet Owner

Joined: Oct 2005

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From: Kentucky

Pull the vacuum line off the fuel pressure regulator. Inspect it for signs of fuel by smell and sight. Well known issue on these trucks is a hole in the FPR diaphragm which allows fuel to be pulled into the intake causing a very rich condition.