mud in the filter.may want to consider running a biocide through the fuel system.if the trucks been sitting for a while it may have algae in the fuel tanks.and IIRC algae looks like a brownish rusty lookin goop.
check the check valve on the brake booster and check the booster itself for a leak.stick your head under the dash with it running and push on the brake pedal.see if it makes a hissing noise.
replace the throttle cable not the spring.i had a 94 450 turbo.i replaced the cable and it felt like i was driving a new truck!
check the check valve on the brake booster and check the booster itself for a leak.stick your head under the dash with it running and push on the brake pedal.see if it makes a hissing noise.
replace the throttle cable not the spring.i had a 94 450 turbo.i replaced the cable and it felt like i was driving a new truck!