My truck is fuel injected but acts like the choke is closed as it emits black smoke and idles real rough ! have replaced map sensor,air valve, e.g.r,plugs,wires but no help.
SOURCE: 2002 Ford Focus - Idles
Vac elbow had small crack in it - replaced the elbow and the car runs great
SOURCE: 1994 ford ranger extended cab 6 cyl fuel injected 2 wheel drive automatic
This year of ranger had a few flaws, In one case, a break power booster was robbing the vacumm, you can test this by plugging it off and seeing the differance, but you will have limited brakes. This model year had a problem with a vacuum leak on the manifold. You can check these in many ways, but please don't use starting fluid. The rear of the manifold usually on the drivers side where it seals to the block.
Also, in 2 other cases a cracked head has gave me the same problem. It is caused from a loss of vacuum.
SOURCE: exhaust blows black on ford explorer
look for a vacume leak. black smoke means it is running very rich
SOURCE: 1985 ford F150 is running very rich. (choke is
When you say it's destroying the air filter---do you mean it's all sooted up ?? I am assuming that what you mean.
Try disconnecting the vacuum line at the egr valve and see if that helps.
But it sounds more like a plugged up exhaust system.Try disconnecting or looosing the flange before the cataylic convertor and then see how it runs.
SOURCE: Ford F150 engine backfiring, running/idling rough
I Have a 1999 ford f150 4.6 that back fires and is just running really ruff when idling alot of nack fire a sord of like a pulse going on what is my problem?
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