Question about 1994 Ford Ranger Supercab

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1994 ford ranger extended cab 6 cyl fuel injected 2 wheel drive automatic

Need help pinpointing reason why my 1994 ford ranger idles roughly, sluggish acceleration, power cuts in and out when pushing the accelerator, loses power and speed after a few minutes of driving at approx 55 mph, does not resume power until vehicle decreases speed to about 35 mph or when coming to a stop, also shifts rough and rpm's exceed higher than normal before shifting to next gear. we replaced the fuel filter, checked vacuum lines, air filters, plugs and wires, could it be a oxygen sensor? if so which one?

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  • Anonymous Mar 17, 2014

    2003 ford ranger over drive light flashing after 50 mph hard shift when starting to speed back up

  • Anonymous Mar 28, 2014

    1995 Ford Ranger 2wd automatic trans. has slow acceleration and won't go 60 miles an hour unless going 3,000 rpm. also OBD system check reported shift solenoid 3 not working properly. I replaced the solenoid but the OBD system report didn't change.

  • Anonymous Mar 29, 2014

    2.3

  • Anonymous Mar 29, 2014

    engine rpm is erratic while driving and engine is power goes from weak to normal. also when engine loses power the engine backfires

  • Anonymous Mar 29, 2014

    the engine rpm gauge is erratic while driving and power is low to normal. engine feels like it is being held back. engine also backfires. I'm thinking there is a sensor that provides this indication but not sure which one.

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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.

Posted on Jan 15, 2009

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