roxtar Posted February 23, 2004 Share Posted February 23, 2004 well, now that my easier problems with my 92 loyale have been solved, how about some help with the trickier one? from time to time, on acceleration or at highway speeds (70 mph+), the engine bucks on me a bit. some times really lightly(3000 rpm and up on the highway), other times it bucks like crazy (usually around 2000 rpm). this usually only happens after i've driven at higher speeds recently (past few days) and then disapates. the error codes i get from the computer are... 11 - crank angle sensor or circuit 13 - cam position angle or circuit 23 - air flow meter or circuit 32 - oxygen sensor or circuit also, everything seems to be fine when i first start up and the engine is cold (before sensors warm up and turn on, so the computer is using default values). I have an O2 sensor that I could install as a place to start. any other ideas??? Quote Link to comment Share on other sites More sharing options...
Skip Posted February 23, 2004 Share Posted February 23, 2004 Not much help but have you changed the fuel filter lately? and These codes could be false codes set when the engine dies unexpectantly. I would attemp to clear them as per the instructions (simply removing the battery cable will not do this) Then see if any return. BTW you have no "cam postion sensor" only a crank position sensor a.k.a. distributor You can see if the 02 sensor is working by observing the 02 monitor on the ECU while the engine is idling when warm. Like I said, sorry not much help Quote Link to comment Share on other sites More sharing options...
roxtar Posted February 23, 2004 Author Share Posted February 23, 2004 yeah, i replaced the fuel filter about 1000 miles ago on one of my earlier attempts to fix this problem. I've also taken off the airflow meter and examined it and it seems ok. If the O2 sensor is constantly reading lean it could be causing a few cylinders to flood when I stomp the pedal (under load or accelerating) Could that cause the symptoms i described? Quote Link to comment Share on other sites More sharing options...
Skip Posted February 23, 2004 Share Posted February 23, 2004 My lame brain says if this were the case, you would see black smoke out the rear when it cleared and the plugs would be black and sooty. Have you looked at them? Maybe the TPS has gone intermitant. Have you tested it? Quote Link to comment Share on other sites More sharing options...
roxtar Posted February 23, 2004 Author Share Posted February 23, 2004 haven't checked the plugs lately, don't have a plug wrench with me here at school, but i'll be able to check them this weekend. never had anyone following me when it was doing this to check on the smoke, plus an engine with 268k miles on it might smoke a little anyway i'm kinda ignorant as to what a TPS is. what is it and does it require one of the new cover sheets? Quote Link to comment Share on other sites More sharing options...
Skip Posted February 23, 2004 Share Posted February 23, 2004 Rox, the smoke from this may be visable in the rear view mirror, and smoke from this would be black (rich cond), worn engine smoke is normally blueish white (oil ). BTW (Should be a plug wrench in your Suby tool kit if it's still in the car.) Here is a link I found doing a quick search for you using "TPS" Please feel free to try a more in depth search if you care. I am very sorry but I have no idea what you mean when you say "and does it require one of the new cover sheets?" SPFI and the TPS Quote Link to comment Share on other sites More sharing options...
roxtar Posted February 23, 2004 Author Share Posted February 23, 2004 i take it that you have never seen the movie "office space". that cover sheet bit is from that movie Quote Link to comment Share on other sites More sharing options...
Skip Posted February 23, 2004 Share Posted February 23, 2004 No I haven't hope some of this helps and your welcome Skipout Quote Link to comment Share on other sites More sharing options...
asavage Posted February 24, 2004 Share Posted February 24, 2004 Originally posted by roxtar from time to time, on acceleration or at highway speeds (70 mph+), the engine bucks on me a bit. some times really lightly(3000 rpm and up on the highway), other times it bucks like crazy (usually around 2000 rpm). this usually only happens after i've driven at higher speeds recently (past few days) and then disapates. the error codes i get from the computer are... 11 - crank angle sensor or circuit 13 - cam position angle or circuit 23 - air flow meter or circuit 32 - oxygen sensor or circuit These are probably spurious codes. I'd clear them, do a run, then check memory again. Missing at 3k at light load may be ignition secondary breakdown (hmmm, two times in one night). Fuel feed problems at that speed would get worse under load -- much worse. If you had, for example, a clogging filter, you might be able to idle OK or drive at low load, but higher demand (a hill, and extended acceleration, etc.) would garner a pronounced loss of power. The range of fuel injection feed rate that the ECU will command is limited. Even really out there sensor readings will still allow pretty reasonable running. IOW, I would not be looking immediately for a fuel related problem. With the exception of a failing TPS, of course -- Throttle Position Sensor, located on the left of side of the throttle body, easy to remove the connector and use an ohmmeter to check the idle switch and wiper. It's a pot and a switch in one unit. If your codes above reappear, start by removing the ECU grounds and cleaning them. They are located on the right intake manifold bolt, near the thermostat housing. Remove the bolt, inspect the ring terminals, lightly oil them and reinstall the bolt. Sometimes too much voltage drop there can cause odd codes that seem to have no reflection in reality. Just a bunch of WAG. Quote Link to comment Share on other sites More sharing options...
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