# car wont rev over 5000rpm
**URL:** https://forums.speedlife.net/t/car-wont-rev-over-5000rpm/129033
**Category:** SON240sx Automotive
**Created:** [October 22, 2009, 5:53pm UTC](https://forums.speedlife.net/t/car-wont-rev-over-5000rpm/129033 "2009-10-22T17:53:53Z")
**Posts on this page:** 14
**Page:** 2
### Author:  [@87s15lt1](https://forums.speedlife.net/u/87s15lt1)
#### Post date: [October 23, 2009, 2:36pm UTC](https://forums.speedlife.net/t/car-wont-rev-over-5000rpm/129033/21 "2009-10-23T14:36:51Z")
Parts replacer? No. Not by a long shot.
Diagnosing via internet is stupid hard.
I say CAS because I have repaired many cars (mostly Honda’s) that have had early cut off problems. 3k, 25k, 45k, and 5k.
90% of them has been crank sensors. the other 10% have been TDCS.
Yet, I would trace your CAS wiring straight to the ecm and grounds.
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### Author:  [@spd-dmn](https://forums.speedlife.net/u/spd-dmn)
#### Post date: [October 23, 2009, 2:37pm UTC](https://forums.speedlife.net/t/car-wont-rev-over-5000rpm/129033/22 "2009-10-23T14:37:18Z")
1. check base timing
2. check the tps for holes in the sweep
3. “turbo still spooling” is not a definitive way to rule out a fueling issue
are you able to check your fuel pressure under load? what fuel pump? stock? walbro? new? used?
1. since you changed the ignitor and plugs, try a different sent of coilpacks. also, it’s possible (but unlikely) that the coil drivers are weak on your ecu. try another ecu.
swapping parts is part of diagnosing… theres nothing wrong or “less technical” about it at all
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### Author:  [@slipperysilvia](https://forums.speedlife.net/u/slipperysilvia)
#### Post date: [October 23, 2009, 3:31pm UTC](https://forums.speedlife.net/t/car-wont-rev-over-5000rpm/129033/23 "2009-10-23T15:31:42Z")
good points mike, when farms called me a few days ago on this the first thing i asked was if the motor was taken apart, cuz i thought maybe his cam gears were off a tooth or something !! ( timing issue)
tps is so easy to check - great idea mike.
farms, if u aren’t sure how call me, ill help over phone.
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### Author:  [@system](https://forums.speedlife.net/u/system)
#### Post date: [October 23, 2009, 3:47pm UTC](https://forums.speedlife.net/t/car-wont-rev-over-5000rpm/129033/24 "2009-10-23T15:47:06Z")
ill be calling you later ^^
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### Author:  [@veloz](https://forums.speedlife.net/u/veloz)
#### Post date: [October 23, 2009, 11:00pm UTC](https://forums.speedlife.net/t/car-wont-rev-over-5000rpm/129033/25 "2009-10-23T23:00:58Z")
Check TPS. Should be at .45v closed. About 4v fully open.
I had an issue like that once, it was bad coil pack wiring. Check coil pack grounds while you are at it.
It seems to be only underload.
What does your wideband tell you?
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### Author:  [@system](https://forums.speedlife.net/u/system)
#### Post date: [October 24, 2009, 3:51pm UTC](https://forums.speedlife.net/t/car-wont-rev-over-5000rpm/129033/26 "2009-10-24T15:51:09Z")
\*\*update \*\*
so i messed around with the car today
i checked the tps sensor closed is .23v and wot is 4.34v, i did a sweep and there is no holes in the sweep to wot ( this test was done when the car was acting up )
I also noticed the car idle fp is 45psi, wand when the car is acting up under throttle the fp goes almost to 0psi, i went to the fuel pump and wired a constant 12v to the pump this symtom still presists, i looks to me like the injectors are dumping fuel into the motor causing to bog to occur at 5k ,
also another new thing i have noticed , the rev limit is going down as low as 3500prm at times
once the car is turned off and let to sit for 30 sec and started back up, i have the stock rev limiter back, but as soon as the car moves , the 5k limiter comes back
farmer
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### Author:  [@Philly](https://forums.speedlife.net/u/Philly)
#### Post date: [October 24, 2009, 4:01pm UTC](https://forums.speedlife.net/t/car-wont-rev-over-5000rpm/129033/27 "2009-10-24T16:01:28Z")
> [@Does any one know who parkes in front of south gate plaza in civics](https://forums.speedlife.net/t/does-any-one-know-who-parkes-in-front-of-south-gate-plaza-in-civics/24441/23):
>
> front what i am reading on zilvia this is a common issue , i have read 8 dfferent post with people with the same issues , but they never post what fixed it
>
> farmer
Try pm`ing the people on zilvia that had the same problem, maybe they figured it out. I`ve done that a couple times and it worked out in the end.
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### Author:  [@system](https://forums.speedlife.net/u/system)
#### Post date: [October 28, 2009, 6:23pm UTC](https://forums.speedlife.net/t/car-wont-rev-over-5000rpm/129033/28 "2009-10-28T18:23:55Z")
problem solved
farmer
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### Author:  [@spd-dmn](https://forums.speedlife.net/u/spd-dmn)
#### Post date: [October 28, 2009, 6:34pm UTC](https://forums.speedlife.net/t/car-wont-rev-over-5000rpm/129033/29 "2009-10-28T18:34:56Z")
what was the cause??
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### Author:  [@Mr\_X](https://forums.speedlife.net/u/Mr_X)
#### Post date: [November 1, 2009, 10:24am UTC](https://forums.speedlife.net/t/car-wont-rev-over-5000rpm/129033/30 "2009-11-01T10:24:53Z")
> [@Official Toyota cheats thread](https://forums.speedlife.net/t/official-toyota-cheats-thread/24567/9):
>
> problem solved
>
> farmer
Another ziliva style thread?
What was it?
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### Author:  [@Happy240sx](https://forums.speedlife.net/u/Happy240sx)
#### Post date: [November 1, 2009, 3:48pm UTC](https://forums.speedlife.net/t/car-wont-rev-over-5000rpm/129033/31 "2009-11-01T15:48:34Z")
Bad fuel pump.
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### Author:  [@slipperysilvia](https://forums.speedlife.net/u/slipperysilvia)
#### Post date: [November 1, 2009, 4:23pm UTC](https://forums.speedlife.net/t/car-wont-rev-over-5000rpm/129033/32 "2009-11-01T16:23:10Z")
thats the first thing i told him to check weeks ago !
glad its fixed finally !
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### Author:  [@system](https://forums.speedlife.net/u/system)
#### Post date: [November 1, 2009, 4:27pm UTC](https://forums.speedlife.net/t/car-wont-rev-over-5000rpm/129033/33 "2009-11-01T16:27:51Z")
when i check the first time , it was operating normally, but the issue was very apparent a few days later , running a 300zx pump now and the car is running bullits
farmer
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### Author:  [@slipperysilvia](https://forums.speedlife.net/u/slipperysilvia)
#### Post date: [November 1, 2009, 5:10pm UTC](https://forums.speedlife.net/t/car-wont-rev-over-5000rpm/129033/34 "2009-11-01T17:10:05Z")
good stufffffff
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