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girlcrazy_4
02-26-2012, 08:04 PM
tryin to fix one of the landlords orchard trucks and I've become stumped.

its a 1989 f250 with the 460fi engine and aod trans. It idles great and anything below 2000rpm it runs fine. I can rev it up to about 3500rpm briefly before it falls on its face. What its doing... if I put my foot to the floor it sounds as if the engine wants to rev but cant, like... as if the engine is on a dyno putting massive stress on it. Its really straining, but just wont go. The air pump was making harsh backpressure sounds so i unhooked it,

Is it possible rodents made a nest in the exhaust? the exhaust before and after the catalytic are approx the same temp. anyways it sounds as if its a restriction problem, intake is clean... so im thinking exhaust. any other ideas??

abec
02-26-2012, 11:02 PM
Check fuel filter and preasure and if theres a cat still?

bigblueford
02-27-2012, 01:25 AM
cat might be pluged

levigardiner
02-27-2012, 09:34 AM
i'd say start with new fuel, and new filter.

Bent Black
02-27-2012, 10:24 AM
10 bucks says Filter! or pump!~[cheers]

girlcrazy_4
02-28-2012, 02:22 PM
I ended up cutting a 2inch hole infront of the catalytic and it runs great, I insisted on removing the cat and strait piping it but landlord just wanted me to leave it alone. Easy $200 off rent for me :)