Question about 1991 Cadillac Eldorado

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1991 eldorado lack of power,

Car runs but lacks power. plugs,wires,cap,ing mod have been replaced with new parts.car has 220.000 miles. exhaust converter does not seem to be clogged,good flow through muffler.can you help?

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Check your rotor under your distributor cap if you have one. That should be replace. Also did you check your mass air flow sensor. you can buy a special spray to clean it out. Do you have a throttle body, if so it is so easy to pull and clean it out. Check your throtle body sensor.

there are a lot of auto part stores and garages that will do free computer checks now. Take advantage of this.

your definately on the right path, just keep digging. Also does your car have a turbo, this could be your problem.

Posted on Jan 31, 2009

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Posted on Jan 02, 2017

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basically replace the cat converters as they are blocking the exhaust system and preventing your over 45mph problem
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Take the oil filler cap off. Stand to the side of the vehicle. Put the car in gear push hard on the brakes, and push on the accelerator to ask a lot of power from the engine. If you get exhaust gas coming out of the oil filling hole, your piston rings are history.

See if that “stuck” code is back, and find out what the code is saying.

I had a 96 Hyundai that got to the point that no acceleration was possible. As it turned out, there were two catalytic converters, one in a coffee can shaped section of the exhaust manifold, and one a lot farther down the tail pipe. It turns out that the face of the first converter had actually melted from the exhaust heat, and the face had seeped over the whole front of that converter, blocking any chance for exhaust to flow through it. My first clue was when I disconnected the exhaust pipe from the manifold, then started the car. There was no loud exhaust noise! (I thought I had lost my mind!) I don't actually think you have this problem, because resetting a code cannot overcome that kind of problem.

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