Question about 1990 Honda Civic

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1990 1.5l wont rev past 3500rpm's

I bought the car and there was no rev limiting at all I could rev up to at least 4000 and probably as far as I wanted to. I got a check engine light after driving it for a couple of hours around town,along with said light the engine wouldnt start at first then it started to stall on me and wouldnt rev any higher than 3500, my first thought was fuel filter so I replaced that and the pcv valve, which solved the rough idle and it doesnt stall anymore but.... still wont rev over 3500 acts exactly like it has a rev limiter .. any Ideas

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  • jmmusser Dec 16, 2008

    I dont know how to run the codes, but yeah just like I said, like a rev limiter effect, you can hold the throttle down and it will get up to 3500 and stay there. just like any newer car. I mean you can smell a little gas but its not flooding it out or anything, no smoke and it seems to flow ok ,it doesnt hesitate,good throttle response and seems to have a normal amount of power

  • jmmusser Dec 16, 2008

    I figured out how to check the codes they are 8 and 10 which are TDC sensor and IAT sensor so they could be bad or I have a bad wire or something along that linebut whats worse is I was holding up some steady rpms and the car blew some oil out the exhaust..thats rings right?

  • jmmusser Dec 16, 2008

    I guess it could have been black condensation but there was some white smoke with it I mean not a big cloud but it was there. think that could have blown out the cat?

  • David Johnson
    David Johnson May 11, 2010

    TDC is to tell the computer exactly when it should fire. The idle air temperature tells it the temp. Are you sure it was oil or could it have been black condensation?

  • David Johnson
    David Johnson May 11, 2010

    This sounds a lot like an exhaust restriction. Has the catylitic converter ever been replaced?

  • David Johnson
    David Johnson May 11, 2010

    I am just offering some thoughts, have you ran the codes? and if you have what were they? Could it possibly have an exhaust restriction. What does it do when it reaches 3500 rpm?



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Honestly I wish I could offer you more info, if it revs now that eliminates the convertor, only I can figure is when you got it to rev you were "blowing the soot out" LOL I hope I have helped you some if so please rate me accordingly.

Posted on Dec 17, 2008


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