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Old 06-04-2012, 08:02   #1 (permalink)
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power problem HELP!

Hi, 1995 high mileage Probe with major power problems that the mechanics can't figure out.

Climbing a hill or coming over a bridge or up out of a tunnel, the car can't go more than 15 MPH. There's only about two inches word of power increase on the gas pedal. Pushing it any further not only doesn't add any power, it confuses the car and shuts the power off. Basically you can only apply the least amount of gas on the pedal.

Mechanics have elimated the tranny, the fuel pump, the air filter, and the catalytic converter -- all are functioning. Last Saturday my mechanic called me and said he just spent 3-1/2 hours, and hasn't the faintest idea why my car has negligible power.

Any ideas! HELP! I'm desperate.

Thank you.
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Old 06-04-2012, 08:13   #2 (permalink)
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Re: power problem HELP!

Fuel filter ?
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Old 06-04-2012, 08:31   #3 (permalink)
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Re: power problem HELP!

Thanks for replying, Mr. Logan, but I stupidly wrote "air filter" for "fuel filter". They did check the fuel filter already, and it's not clogged.

Some things people have suggested are: fuel regulator; emission valves; torque converter.

Of course, it could easily be something altogether different.
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Old 06-04-2012, 08:34   #4 (permalink)
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Re: power problem HELP!

What engine is it? Maybe jumped time if the belt is old.
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Old 06-04-2012, 08:58   #5 (permalink)
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power problem HELP!

Did you mean the timing belt? It was replaced last year.

It seems to me that a key clue is that not only is there little power, but that the power does not increase with increased pressure on the gas pedal -- on the contrary, the power stops feeding altogether. That is, it runs normally to about two inches of depressing the gas pedal, and then anything past that point does not exist.
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Old 06-04-2012, 09:06   #6 (permalink)
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Re: power problem HELP!

Checked all vac hose/pipes for leaks or cracking ? Also , as Bert suggested , worth checking timing . If belt jumped , for whatever reason , could be badly retarded / over advanced which would give you those symptoms .
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Old 06-04-2012, 09:59   #7 (permalink)
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Re: power problem HELP!

Could also check MAF sensor and TPS .
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Old 06-04-2012, 10:07   #8 (permalink)
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power problem HELP!

"MAF Sensor" and "TPS" ? Sorry, I'm not an expert like you guys, what do those terms mean?
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Old 06-04-2012, 13:59   #10 (permalink)
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Re: power problem HELP!

Another thing that can cause that is a plugged exhaust.
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