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Posted: Sun Mar 29, 2009 10:46 am Post subject: Need help, my m20b20 l-jet rev cut at ~5500rpm
Greetings sifus and grand sifus, i've read through quite a lot of forum and wikis and all of it mentioned m20b20 rev limit is at 6500rpm. If that's the case then what's causing mine to cut-off at around 5500rpm? Clogged fuel filter? Dirty injectors? or maybe spark plugs need replacement?
wks79 Official Member
Joined: Jan 15, 2008 Posts: 397
Posted: Sun Mar 29, 2009 5:58 pm Post subject: Re: Need help, my m20b20 l-jet rev cut at ~5500rpm
b4 anything , just bring ur car to the mech n check all the sparks, battery, ..fresh oil change all around ..new air filter/oil filter .
this is assuming u havent done a full service for the car .
it's a good idea also to check the injectors ,
i believe Optimum workshop has injector cleaning machine also .
ya ur engine shouldbe revving
to 6k rpm with no prob at all .
hope this helps
highwaystar MB Official
Joined: Jun 13, 2006 Posts: 5329 Location: Kola Lompuer
Posted: Mon Mar 30, 2009 12:49 am Post subject: Re: Need help, my m20b20 l-jet rev cut at ~5500rpm
my l-jet no cut off... most motronic does. go to mech and have it diagnose.
cheers
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kura2 Top Poster
Joined: Feb 26, 2009 Posts: 292
Posted: Mon Mar 30, 2009 6:21 am Post subject: Re: Need help, my m20b20 l-jet rev cut at ~5500rpm
highwaystar wrote:
my l-jet no cut off... most motronic does. go to mech and have it diagnose.
cheers
ermmm, no cut-off for all l-jet or some mod required?
highwaystar MB Official
Joined: Jun 13, 2006 Posts: 5329 Location: Kola Lompuer
Posted: Mon Mar 30, 2009 8:53 am Post subject: Re: Need help, my m20b20 l-jet rev cut at ~5500rpm
i dont even recall that ljet got cut off. mmm... mine when i bought no cut off lah... lemme check
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eezuan .com Member
Joined: Jul 12, 2007 Posts: 46 Location: kuala lumpur
Posted: Mon Apr 06, 2009 9:12 am Post subject: Re: Need help, my m20b20 l-jet rev cut at ~5500rpm
hello, as far as my experience, that is because off the afm spring is too loose, and it will over supply the fuel and you'll have the cutt off early..
that what i have experienced before la..
_________________ hihohiho
lionel Top Poster
Joined: Aug 20, 2006 Posts: 441
Posted: Mon Apr 06, 2009 10:09 am Post subject: Re: Need help, my m20b20 l-jet rev cut at ~5500rpm
i think its not a cut off ......wat u feel is after 5000 rpm ur cant rev anymore ....
Many reasons cause tat happened .....
Check from most simple thing like fuel filter , injectors and air filter ....
I face d problem and found out its my open pot damm dirty and block d air flow ...so not enuf for d combustion ........rev stuck at 5000 rpm ....
kura2 Top Poster
Joined: Feb 26, 2009 Posts: 292
Posted: Thu Apr 23, 2009 4:28 pm Post subject: Re: Need help, my m20b20 l-jet rev cut at ~5500rpm
eezuan wrote:
hello, as far as my experience, that is because off the afm spring is too loose, and it will over supply the fuel and you'll have the cutt off early..
that what i have experienced before la..
any way to adjust? or have to get spare afm
kura2 Top Poster
Joined: Feb 26, 2009 Posts: 292
Posted: Thu Apr 23, 2009 4:33 pm Post subject: Re: Need help, my m20b20 l-jet rev cut at ~5500rpm
lionel wrote:
i think its not a cut off ......wat u feel is after 5000 rpm ur cant rev anymore ....
Many reasons cause tat happened .....
Check from most simple thing like fuel filter , injectors and air filter ....
I face d problem and found out its my open pot damm dirty and block d air flow ...so not enuf for d combustion ........rev stuck at 5000 rpm ....
replaced fuel filter(rm40, expensive?) but still stuck at 5500 though rev smoother at lower rpm. will proceed to remove filter later when free.
eezuan .com Member
Joined: Jul 12, 2007 Posts: 46 Location: kuala lumpur
Posted: Fri Apr 24, 2009 6:23 am Post subject: Re: Need help, my m20b20 l-jet rev cut at ~5500rpm
where u stayin? mind to meet up?
_________________ hihohiho
kura2 Top Poster
Joined: Feb 26, 2009 Posts: 292
Posted: Fri Apr 24, 2009 8:37 am Post subject: Re: Need help, my m20b20 l-jet rev cut at ~5500rpm
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