1992 f150 302 sluggish acceleration problem
first off I own a 92 f150 5.0 302 5-speed std 4x4. one night I got stupid and went mudding with a couple buddys, and got stuck so I was driving her pretty hard. ever since that night my truck seems to have lost a lot of its bottom end performance. in neutral the truck will rev high right away, but in gear it takes a while for the rpms to rise.
here's a list of what I've checked already: -plugs/wire, rotor are a year old -checked timing -changed fuel filter -checked compression not sure what else to check, any ideas? |
One or all of the cats may be clogging up.
|
thanks for the quick reply, i have been wondering if that could be the issue, but i don't want to cut it off and find out because i don't have a welder or anything. i took the o2 sensor out (thinking it would allow trapped exhaust gases to excape, but it was worse). is there an easy way to check it without removing it?
|
A muffler shop can check for clogged cats easily.
|
i took the whole exhaust system right off the manifolds and went for a drive and it seemed to have less power yet, does that mean my cats probably good?
|
Have you checked on a possibly clogged air filter or air inlet tube? Dirty throttle body. Possibly mud caked up on the rear drums or clutch disc? How does it shift?
|
i have checked the air filter/intake and cleaned the throttle body, i have also changed the o2 sensor and checked fuel pressure. i never really thought about the brakes being caked with mud but i've been driving it for a couple months like this already. i will lift the truck off the ground and see if there is much resistance felt later, in the mean time anymore ideas guys? we'll get it figured out yet!
|
i jacked up the front and back of the truck and all wheels spin freely, so i guess i'll keep looking for a solution
|
Check you're compression.
|
i checked compression and its good but i noticed when i pulled the spark plug wire off the #5 cylinder when it was running there was no idle change, does this mean its not firing? i know its got spark
|
How do you know it has spark? Pull the plugs and look at them.
If it were MY truck, I'd change the plugs, wires, cap, and rotor. |
I would definitely perform a compression test. Also, one year old plugs, wires, cap and rotor should be replaced. If you installed budget grade parts store components, they might be due for a change. I recommend brass contact cap & rotor, low ohm plug wires and copper core Motorcraft plugs. It wouldn't hurt to replace a factory coil.
|
i pulled all the plugs and they looked alright, i think my truck has champion ignition parts, so it wouldn't hurt to put better on, what brand would you recommend for wires and cap/rotor
|
I personally would use Motorcraft wires, Motorcraft or Autolite copper plugs, and any name brand rotor/cap with BRASS contacts.
|
Or MSD Street Fire wires, MSD Cap & Rotor, and Motorcraft plugs. I have heard about a few issues with Autolite plugs over the past year from the Gen. 1 Lightning owners on NLOC.
|
All times are GMT -4. The time now is 06:33 PM. |
© 2024 MH Sub I, LLC dba Internet Brands