Question about 1991 Acura Integra Hatchback

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96 Integra LS - No powerould be, could be a stopped up exhaust, c

First off I was having an issue with the car over heating due to the radiator fans not activating. After pulling and re installing the fan relay all was good. However, I am still having an issue that the motor has no power at large throttle openings. If I let the car idle in gear it will move and behaves normally up to about 1/8 throttle, but as soon as I press the accelerator any further the engine loses all revs and wants to die. If I don't let off the gas the engine will die.

Related parts replaced over the last 2 years: distributor assembly, pcv, spark plugs, air and fuel filters.

Any advice appreciated.

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  • jstreet44 Jul 28, 2009

    Set the timing last summer after replacing the dist assembly due to bad coil or ignitor, didn't want to troubleshoot. Idle is also correct. Weird thing is when the motor loses power the engine is missing for sure and yet throws no codes?!?!?!?! I am leaning towards too little fuel. I am going to test fuel pressure and run propane into the intake to see if that will alleviate the symptom. I will probably scope the O2 sensors as well to see if they are sending the proper signals to the ecu. Sound reasonable?



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Check your timing and also your idle. Also, if your "check engine" light is on, get it tested or buy the diagnostic device from any auto parts store. Read the instructions and if you get a code you can look it up here or let me know what it is, that would help a lot. Your car is dying when accelerating because there is either too much fuel or oxygen in the chambers, so the mixture is not proportional and one of the two overcomes the lower one, thus not producing a proper balanced combustion inside your cylinders.

Posted on Jul 26, 2009

  • DeezNutz74 Jul 28, 2009

    before you do all of that go to autozone and get a compression test kit, they are pretty cheap. then test the compression in each cylinder. Here is a video of how to do the compression test, the principles are the same for your car:

    The compression should be fairly even for all cylinders, with about a 10% difference between them if any. Get started with this and see where it takes you. If there is a difference, then let us know. O2 sensors do go bad, but they are pretty much very reliable. Instead of buying a new one you can take it off and clean it with brake fluid, let it dry, and then replug them back in. Start with that and let me know.



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