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I bought this truck 3years ago. Was first truck in my life I never had a truck. When I bought I was so happy was pretty much everything OEM. After half year transmission is f....
I rebuilt f transmission after year and half start getting overheating on first start after 5km drive all coolant out. Than I changed IM gasket. Same story again
and in few months checking and searching I decide change new water pump and radiator. And overheating is gone. I think was old radiator !! But now is done I changed WP.
All that time I think was lack of power and acceleration.
So you bought an old truck in good shape. How many miles on the engine?
You drove it for half a year. How many miles?
Then it started overheating after fixing the transmission. And you think that it has always been low on power since you bought it? So it has never really run right?
Could be many things. What size truck is it? Super Crew, XL, 4WD...? Maybe the 4.6 isn't much for the size of the truck. Manual transmission or automatic?
Is 97 F150 4.6 4x4 excab xlt flareside automatic .Yes I think they never run right in this 3 years. I bought with 280k now is 320k
That is a lot of miles. Engines will make as much power as they can for the amount of air that is let in. Make sure that the air path, from the inlet through the air filter and through the throttle body is clear. Make sure that the throttle blade is opening all the way. But, an old engine just might not be able to use the air that is let in.
There are some basic diagnostics you can do for old engines to see if they're worn out, like measuring cylinder pressures. The experienced Ford guys will know more about a 300K+ mile 4.6. Good luck.
That could be a fuel supply problem. The +23 means that the computer is opening the injectors 23% longer than expected. (Edit - based on the MAF and O2 sensor readings).
I don't know what the fuel pressure specification is for a 1997 4.6. You said that you saw 40 psi while driving. Maybe Steve83 knows. He knows high mileage also. @Steve83 J/Brew probably knows too. No offense to everyone else. @Jbrew
"I change fuel filter checked fuel pressure idle 32psi when I drive 40psi "
Last edited by BareBonesXL; 03-19-2019 at 11:38 PM.
hi I think is stit OEM intake is aluminum and exhaust looks ok but is rusty little bit and I have some rattling when I driving. I didn’t check fuel injectors? I don’t know for fuel Trim is both or just one they give me just order
Hi again . Yesterday I cleaned my fuel injectors and was really clogged with some black things inside. I cleaned all 8 but honestly I don’t when previous owner changed. They looks old. I cleaned with carb cleaner. I notice little power and acceleration which is good. But I’m sure still missing power and acceleration. Guys is possible exhaust muffler clogged???
fuel injectors was really dirty one was totally clogged .
03-19-2019, 10:36 PM
