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Ford Truck Club Forum > FORD F-250 | F-350 SERIES | SUPER DUTY > 1987-1991 Ford F250 | F350

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Old March 23rd, 2018, 01:22 AM
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wclrjohn wclrjohn is offline

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Cool No power / speed

I'm buying a F350 gas with 460 (7.5L) automatic from a friend. Original problem was bad oil pump. The mechanic he took it to drilled thru the block trying to fix a broken bolt. Mechanic installed a used engine from an econoline van same size engine. When he picked it up it would not go faster then 20 MPH. He then bought a different motor on line (used) had it installed and still same problem. I started the truck yesterday and after 2 -3 minutes valves stopped rattling (engine had been sitting for few months without being started). I did notice allot of rattling coming from CAT. I couldn't take it for a drive (it was barried behind years of trash) but for the most part it was idling on it's own I felt the exhaust and felt no misfire, check engine light was not on. Could it be a vacuum line going to the transmission? Oh by the way it's a 4 X 4. strange that two different motors would do the same thing. Any ideas before I put a 3rd motor in it.
Old March 23rd, 2018, 10:22 AM
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glc glc is offline

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The cat is plugged or you have another exhaust blockage.

2003 F-150 XL RCSB 2wd 4.2 5 speed 3.55 LS
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harrison28 (March 23rd, 2018)

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