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| Wont rev past 1500rpm? https://forum.silviansw.com/viewtopic.php?f=12&t=34914 |
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| Author: | gulrez [ Tue Feb 01, 2011 4:48 pm ] |
| Post subject: | Wont rev past 1500rpm? |
Hey guys, I have a 180sx type x 1996, which i got imported, i have a problem where when i start the car it runs fine for 5 minutes almost exactly and then the revs get limited to 1.5k...then i turn the car off and on again and its fine for another 5 minutes. However if the cars been standing in the sun for a while and the body is hot or something, the problem doesnt occur...so its intermittent....any ideas? |
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| Author: | DumHed [ Tue Feb 01, 2011 5:33 pm ] |
| Post subject: | |
I've seen a problem like that which was caused by the alternator not being correctly wired up so the voltage goes too high after a while and the ECU goes to limp mode. Does it run for longer if the lights are on? If you can put a multimeter on it and check battery voltage while it's running, or plug in a consult cable you can check it. Voltage shouldn't go over about 14.5v and should normally be 13.8 when the engine is running. |
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| Author: | gulrez [ Wed Feb 02, 2011 12:58 pm ] |
| Post subject: | |
nope voltage seems fine too...mayb the ecus bonked it? |
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| Author: | DumHed [ Wed Feb 02, 2011 6:58 pm ] |
| Post subject: | |
you probably need to get a consult on it and check all the sensors. Something like a broken temp sensor can cause this sort of issue, but the time frame would generally be shorter. |
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| Author: | Johnnilicte [ Thu Feb 03, 2011 9:29 am ] |
| Post subject: | |
Try and unplug your AFM and start and run the car, obviously it will not rev past ~4k but try it. |
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