I have an 89 F150 5.0 that I am trying to haul a 2875# single axle travel trailer with. I was told by numerous mechanics and friends that it should be no problem and hardly noticeable...Well WRONG!!!! It not only notices but feels like I have an anchor behind me. What is happening i the vehicle has no UMPH!! AT ALL! Ran codes and got KOEO=11 and KOER=44. Could an O2 or faulty Cat convert cause this? I bought the truck off of an old farmers wife whose husband passes. It has 125000 miles on it.Just changed plugs wires and new timing chain and water pump since the chain jumped. It runs ok most of the time smooth but lacks power sometimes she runs rough but few and far between. I have a 4 speed manual trans in it.

Thanks everyone. Love the truck but need it to pull this camper.

Andy

 

Yeah the 5.0 truck motor of that vintage is a gutless wonder but it could also be saddled with totally inappropriate(for a truck) axle gearing. Find the axle code on the drivers door pillar and post it up. Also check base timing and fuel pressure to see if they are at spec, and consider doing a cam swap and exhaust system.

 

The Axle is at a 19 with an "F" Transmission..

 

19 is the code for 3.55 gearing. The "F" is for electronically controlled automatic 4 speed transmission.

 

That's funny since I have a 4 speed manual...lol

 

That might be the problem. LOL. I just reread your first post. I'm not familiar with the "F" type transmission. Ford used a T-19 four speed manual transmission but stopped using them in 1988.

 

Yeah that can't be right since there was no electronically controlled auto until 1989.

 

So basically, what he has is a truck built in late 88 but was stamped as a 89. I've had this happen with a couple of cars I've owned. Matter of fact just traded in an 04 Cadillac CTS with a 3.2L 5speed manual. 04 was suppose to be all 3.6L. I guess they let about 2% of 03 cars go through as 04.

Anyway, If you're lacking power, go back, pull the spout and recheck your timing, you may need to advance it a few degrees. Check your fuel pump pressure. When was the last time the fuel filter on the frame was changed?

 

Had to go to 4 10 gears just to be able to pull 4000 pound camper. It was just to much for the drivetrain combo and thought it was working it to hard. Got a bigger truck, but I would think you should be able to pull yours if everything was ok with the truck.

 

Talked to exhaust guy and tomorrow we are yankin the cat! Will see how that does!!