engine failure at 5500 rpm
Dec 16, 2012 | 09:04 AM
#1
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engine failure at 5500 rpm
engine failure at 5500 rpm and does not mark any code in the scanner OBII
I have a 2003 Tacoma 3.4L supercharger, the engine is stock ...
modifications:
** Change the pulley for a smaller, good for 15psi
** FMU install
** Stage II centerforze cluch
** Water methanol injection (still not working)
my problem is that at 5500rpm, the power is interrupted a second or two and then continues accelerating ....
sensors that may be failing? MAF? O2?
I have a 2003 Tacoma 3.4L supercharger, the engine is stock ...
modifications:
** Change the pulley for a smaller, good for 15psi
** FMU install
** Stage II centerforze cluch
** Water methanol injection (still not working)
my problem is that at 5500rpm, the power is interrupted a second or two and then continues accelerating ....
sensors that may be failing? MAF? O2?
Dec 16, 2012 | 10:08 AM
#2
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Wow! 15#s? Can these stock motors handle that much? Any chance the SC is blowing out the spark. I would hate to have anything go wrong at the Apex of the power curve.
Last edited by DRCOFFEE; Dec 16, 2012 at 10:11 AM.
Dec 17, 2012 | 04:25 AM
#3
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From: DFW TEXAS BABY!
5500rpm is the redline for the 5vz. So it should not rev any higher then that. Fuel cut also happens at ~110mph.
What size pulley? It is highly unlikely that you are making 15psi on a TRD SC. Max I could get out of it was ~11-12psi with a 2.0 pulley (overdriving it a lot already).
I also hope that you have some kind of fuel mods other then just the FMU? That is not enough to keep the leanout at bay.
What size pulley? It is highly unlikely that you are making 15psi on a TRD SC. Max I could get out of it was ~11-12psi with a 2.0 pulley (overdriving it a lot already).
I also hope that you have some kind of fuel mods other then just the FMU? That is not enough to keep the leanout at bay.
Dec 19, 2012 | 10:14 AM
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5500rpm is the redline for the 5vz. So it should not rev any higher then that. Fuel cut also happens at ~110mph.
What size pulley? It is highly unlikely that you are making 15psi on a TRD SC. Max I could get out of it was ~11-12psi with a 2.0 pulley (overdriving it a lot already).
I also hope that you have some kind of fuel mods other then just the FMU? That is not enough to keep the leanout at bay.
What size pulley? It is highly unlikely that you are making 15psi on a TRD SC. Max I could get out of it was ~11-12psi with a 2.0 pulley (overdriving it a lot already).
I also hope that you have some kind of fuel mods other then just the FMU? That is not enough to keep the leanout at bay.
Dec 19, 2012 | 10:23 AM
#5
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From: DFW TEXAS BABY!
Well if everything else is in order, then it sounds like you are hitting fuel cut or you are hitting the redline. Redline is more likely.
Also good luck with a sub 2.0" pulley. My supercharger died after about ~3k miles with a 2.0" pulley and a tensioner to keep the belt from slipping.
I would go back to a 2.1" pulley if I were you. First off you are overspinning the SC big time. Next without some sort of cooling like meth injection the SC will overheat and contact the casing sooner or later. Lastly it is doubtful you are making much more power with a smaller pulley without meth injection since the IAT's will be well over 300f degrees if not over 400f.
The TRD SC is ok for a mild boost in power but it is not what you want for any kind of real power numbers. If you want some real power then pull the SC off and go turbo. You will easily make the same power as a maxed out SC with a small turbo that is hardly working.
Also good luck with a sub 2.0" pulley. My supercharger died after about ~3k miles with a 2.0" pulley and a tensioner to keep the belt from slipping.
I would go back to a 2.1" pulley if I were you. First off you are overspinning the SC big time. Next without some sort of cooling like meth injection the SC will overheat and contact the casing sooner or later. Lastly it is doubtful you are making much more power with a smaller pulley without meth injection since the IAT's will be well over 300f degrees if not over 400f.
The TRD SC is ok for a mild boost in power but it is not what you want for any kind of real power numbers. If you want some real power then pull the SC off and go turbo. You will easily make the same power as a maxed out SC with a small turbo that is hardly working.
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