1990 Ford F-150 Q&A

1990 Ford F-150 Question: ruff idle

The last few days my truck has been idling ruff on a cold start (engine cold), enough to shake the hole truck, it goes away if i rev it up to 2000rpms and hold it tell the motor is warm then it will idle smoothly, i did put fuel from a passable dirty tank in it with some see foam added, not sure if its a fuel problem or just a timing issue, my uncle thinks its a fuel injector problem, any help appreciated thanks. Its a 1988 F150 with the 5.0L (302) 4 speed 4x4 -
Answer 1
Change fuel filter -
Answer 2
add fuel injector cleaner and upgrade to 93 octane ( you might have bought some gas that had water in it) try a bottle or two of Isopropyl alcohol -
Related Items:
My truck has been running ruff for the last 10 days. It started with an idle like shake around 55 mph and when it was going up hills. It then started to run more ruffly during multiple speeds, now ...
I cheked cap rotor , plugs, and new wires , not sure what to do
I replaced my camshaft synchronizer, because a code told me to wile I had it apart I replaced the EGR, and mass air flow sensor and throttle body sensor done a fuel injection service. Replaced t...
i have changed plugs, checked coils, replaced dpfs for egr,it does have 225000 miles.does not s...
On higher mileage vehicles, one or more EGR orifice in the intake manifold may plug with sludge. This can cause the engine to misfire when first accelerating because too much exhaust gas is directe...