# \*\* Car won't rev past 2500rpm \*\*
**URL:** https://forums.speedlife.net/t/car-wont-rev-past-2500rpm/158007
**Category:** SON240sx Automotive
**Created:** [July 18, 2010, 9:36am UTC](https://forums.speedlife.net/t/car-wont-rev-past-2500rpm/158007 "2010-07-18T09:36:42Z")
**Posts on this page:** 8
**Page:** 1
### Author:  [@1991s13](https://forums.speedlife.net/u/1991s13)
#### Post date: [July 18, 2010, 9:36am UTC](https://forums.speedlife.net/t/car-wont-rev-past-2500rpm/158007/1 "2010-07-18T09:36:42Z")
hi guys i have a 1991 240sx it wont rev past 2500rpm i belive its the maf but i have no way to check i need help i live in the south end of barrie please help!
Jesse
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### Author:  [@nismo23](https://forums.speedlife.net/u/nismo23)
#### Post date: [August 5, 2010, 1:51pm UTC](https://forums.speedlife.net/t/car-wont-rev-past-2500rpm/158007/2 "2010-08-05T13:51:45Z")
Been There done that… You can start by doing a little more research. But I know how frustrating it can be. So here is a guide. Pull the codes from your ecu. error code 12 will indicate a bad maf. before you go out hunting down a maf you can attempt CRC maf cleaner. If that fails then you can ask a friend with a s13 to come test his maf( if you don’t have a friend with s13, try the lend a hand program)… Plenty of good people out there. If your car fires up and runs normal… Go buy a good used maf! If not your problem clearly lies somewhere else. There could be a leak somewhere after the maf, or electrical issue(unlikely) So…
1.Test a buddies maf
2. If same problem occurs, start searching for leaks.
3. I highly doubt this would be the situation but there might be electrical problem. In that case measure your voltages at the MAF and ECU and post them.
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### Author:  [@Neon\_Rain519](https://forums.speedlife.net/u/Neon_Rain519)
#### Post date: [August 5, 2010, 4:55pm UTC](https://forums.speedlife.net/t/car-wont-rev-past-2500rpm/158007/3 "2010-08-05T16:55:33Z")
MAF- First place to start and the most likely problem
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### Author:  [@BoOsT-HuNgRy](https://forums.speedlife.net/u/BoOsT-HuNgRy)
#### Post date: [October 10, 2010, 4:00pm UTC](https://forums.speedlife.net/t/car-wont-rev-past-2500rpm/158007/4 "2010-10-10T16:00:48Z")
clogged cat
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### Author:  [@DJPyro](https://forums.speedlife.net/u/DJPyro)
#### Post date: [October 11, 2010, 7:06am UTC](https://forums.speedlife.net/t/car-wont-rev-past-2500rpm/158007/5 "2010-10-11T07:06:02Z")
^ He probably doesn’t have one, and it should still rev above 2500RPM with a clogged cat, just gutless… If it falls on its face completely when you hit 2500RPM it’s MAF. If it’s just gutless after 2500RPM it could be a plugged cat.
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### Author:  [@fastback240](https://forums.speedlife.net/u/fastback240)
#### Post date: [September 12, 2011, 4:07pm UTC](https://forums.speedlife.net/t/car-wont-rev-past-2500rpm/158007/6 "2011-09-12T16:07:19Z")
i once met a kid with this sammmeee problem…
dk cristalfx if i remember correctly…
check your throttle cables are on.
dj pyro pete whats up brother?
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### Author:  [@Nissan\_Crazy](https://forums.speedlife.net/u/Nissan_Crazy)
#### Post date: [September 14, 2011, 11:25am UTC](https://forums.speedlife.net/t/car-wont-rev-past-2500rpm/158007/7 "2011-09-14T11:25:57Z")
> [@Neon\_Rain519](#):
>
> MAF- First place to start and the most likely problem
+1 could also be an air leak after the MAFS and before the throttle body
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### Author:  [@RED\_LINE](https://forums.speedlife.net/u/RED_LINE)
#### Post date: [September 23, 2011, 4:39pm UTC](https://forums.speedlife.net/t/car-wont-rev-past-2500rpm/158007/8 "2011-09-23T16:39:57Z")
It’s just running on Eco Mode bro 😛