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Showing results for tags 'revving'.
Found 2 results
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Hi all, I've noticed in the last few months what seemed like a tiny issue that suddenly got a lot worse last night. A few months ago I noticed that the engine while idling or while holding a fairly slow speed, particularly while still warming up, the revs would rise very slightly for a few seconds, then drop back again for a seconds then repeat until the car was at normal operating temperature when the issue seemed to go away - it would only rise a small amount say from 1200 to 1220 rpm, just enough to notice a pitch change in the sound of the engine. However last night while driving home after a 4k trip to grab groceries, I noticed that the revving issue was now affecting the car at full temperature, and the difference in revs was much greater, roughly 1200 rpm to 1400 or 1500 rpm - by the time I got home I noticed that the headlight and tail light brightness would rise and fall with the engine revs. I turned the car off and let it sit for a couple of hours, then turned it on and let the engine idle, which it did without any rise and fall in revs - I'll take it for a drive around the neighbourhood tonight and see if the rise/fall thing starts happening again. Has anyone experienced a fault such as that before? I wondered if the alternator or some electrical system was malfunctioning but the battery is quite new and still has plenty of kick to turn over the N62. TIA for any helpful hints and advice, Chris W, Chch
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Hey guys, I was coming off the motorway yesterday in fifth, I needed to slow down so changed into fourth, when I put my foot on the clutch the revs started rising to about 4500, I put it in neutral and the revs would maintain 4-5000 revs! I drove for about 800m and every time I changed gears the revs would rise to 4k. I managed to pull over and stall the car to turn it off, but even in neutral the car would rev very high without my foot on the gas! Very strange. I left the car off for around 40mins, started her up and was fine! Even went to Penrose and back with no issues. My car is an 82 E21 - m10 1.8 carbureted. I've done some research and think it could be a vacuum leak from the manifold - but couldn't find anything loose.. Possibly m/t fluid.. not sure If anyone has any knowledge around this or knows anyone that could have a check it would be much appreciated. Cheers guys.
