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Old 06-28-2012, 12:19 AM   #1
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Rev limiter kicking in at 3200 rpm

I recently changed my timing belt and afterwards ive noticed that Now I can't get the rpms over 3200 without the rev limiter kicking in. Any one have any idea what could cause this???

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Old 06-28-2012, 03:30 AM   #2
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Ok, so first off I'm going to have to guess you have a 4cyl since the 4.0 has a chain and not a belt. It would help if you posted some info about your jeep when you post a question. ( sorry that's more to everyone on here and not just you) but we are both new Yorkers so I know you can take it;-) so if it the 4cyl that you have it sounds like you might of missed a gear or two when putting your new belt back on( ie on the cam or crank gears)...once I sober up I will ask a few people to get you a better answer on how to fix your problem... But I'm sure. A few more with some better knowledge will chime in before then....

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Old 06-29-2012, 12:45 AM   #3
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It's a 06 2.4l 4 cyl. And it runs perfect. It just hits the rev limiter at 3 grand or so. It doesn't make any sense to me. With the way it runs I'm sure it's not a timing issue
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Old 06-29-2012, 07:04 AM   #4
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I didn't know jeeps have a rev limiter, whatever that is. Diesel truck engines have governors but not gasoline engines.
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Old 06-29-2012, 09:05 AM   #5
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Well it's not a jeep engine. It's the DOHC 2.4L out of the neon, pt cruiser etc.....
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Old 06-29-2012, 09:36 AM   #6
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But I still do not know of a gasoline engine in any us vehicle with a so called rev limiter or governor. Sounds like you may have a restriction in the exhaust causing excessive back pressure and not letting the engine go above a certain rpm.
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Old 06-29-2012, 10:01 AM   #7
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Nope. It's all fine. I've had several cars tha have had rev limiters. Most were sports cars with turbos and such. When you rev them to there limit. They make a surging sound and instantly lose power until you lift off the trottle
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Old 06-29-2012, 10:40 AM   #8
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But I still do not know of a gasoline engine in any us vehicle with a so called rev limiter or governor. Sounds like you may have a restriction in the exhaust causing excessive back pressure and not letting the engine go above a certain rpm.
Every single computer controlled gas engine in a vehicle has a rev limiter. Without them, OEMs would be paying tons of money doing warranty work on overrevved engines. The 4.0L jeep engine has the limiter at 5200 from what I remember.

I'm not familiar with the timing belt changing or adjusting, but I would suspect that the valve timing is off and that's why it wont rev over 3000. If there is no adjustment, I would look into the cam / crank sensor to make sure they are both hooked up and working correctly.
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Old 07-10-2013, 11:45 AM   #9
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My '06 4.0l seems to cut out between 3 and 4 grand when revving without a load on it, but seems to do fine with a load on it. It would just be nice to show off the glass pack in neutral tho ;-)
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Old 07-10-2013, 01:55 PM   #10
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My '06 4.0l seems to cut out between 3 and 4 grand when revving without a load on it, but seems to do fine with a load on it. It would just be nice to show off the glass pack in neutral tho ;-)
I wonder if something in your exhaust is a bit plugged up... maybe a cat? And revving it up into some pretty decent rpm's and no load isn't exactly good for the engine, but hey, it sounds damn cool

Edit: I assumed he had a manual. If its an antomatic, the engine will not rev past a certain point in park or neutral to protect the engine. Thanks Otto Man
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Old 07-10-2013, 02:13 PM   #11
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If you are just revving it up in Neutral or Park, it will not rev past that point to prevent you from blowing it up. As long as it goes past that with load on it (in gear) you should not have a problem.

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