Can't boost over 5-6psi PLEASE HELP
- Thread starter Matthew
- Start date
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- 2001 Mazda MP3
matt, wanna buy my custom fuel rail with built in gauge ?
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- 2002 BJFW, 2007 BK3P, 1979 SA22C, 2005 BK3P
i have had this problem MANY times. add an inline fuel pump - your stock pump has enough volume but not enough power to feed the fuel required for the added boost.
Little Beavis
Member
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- 2001 MP3-T (#911)
If you can run 4 psi without a problem, it isn't bad fmu, bad wiring, or bad vacuum lines. . .because it is working up to 4 psi. You go from there.Matthew said:
Little Beavis
Member
- :
- 2001 MP3-T (#911)
AMEN!Captain KRM P5 said:
Hey, I was just in Grayslake today (twice. . .)
Got the MP3 ECU code dumped onto a computer with a "promise" that they could reprogram it in the next 30 days. . .woohoo. . .we'll see. . .anyway, sorry for the threadjack.
matt.. did u ever install the a/f gauge in the car.. before the turbo kit.. to see how it read? most of those bulls*** a/f gauges will just bounce back and forth all the time and then when you floor it they will go rich.. what wires did you hook it up to on the o2?
pat.. u guys just installed one of these.. u remember what wire it was?
pat.. u guys just installed one of these.. u remember what wire it was?
i dont want to be buying s*** and it not fix the problem. thats why im hesistant to spend 300+ on a WB guage only to find out i AM running lean...which although the wideband is a great tool, if i AM running lean, then that money was a waste of resources for the time being.
so far i have been told EVERYTHING could be wrong...at this point if i followed everyones suggestions i would replace just about everything but the turbo and manifold itself.
dont get me wrong, i appreciate everyones help, its just there is no concensus as to what is wrong.
i want a new inline pump anyhow - however - i just simply dont understand how mike could be boosting 11lbs and im boosting 5 and cant stay rich and he can...that doesnt make sense...just like this whole thing worked in jamies car and not in mine...i know im not great with this s*** but after all ive been through i feel i at least know what im talking about and hell no one seems to know what the problem is.
so far i have been told EVERYTHING could be wrong...at this point if i followed everyones suggestions i would replace just about everything but the turbo and manifold itself.
dont get me wrong, i appreciate everyones help, its just there is no concensus as to what is wrong.
i want a new inline pump anyhow - however - i just simply dont understand how mike could be boosting 11lbs and im boosting 5 and cant stay rich and he can...that doesnt make sense...just like this whole thing worked in jamies car and not in mine...i know im not great with this s*** but after all ive been through i feel i at least know what im talking about and hell no one seems to know what the problem is.
MP3skaterNC
JDM *****.
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- slotege mp3
http://mazdamp3.com/vbb230/showthread.php?t=23731
fuel pump might be the problem, for 100 bucks the added safety of fuel pressure might be enough to make it not lean.
I know you have friends that claim to run crazy amounts of boost on the stock pump, but maybe yours is just weak like bevis said?
fuel pump might be the problem, for 100 bucks the added safety of fuel pressure might be enough to make it not lean.
I know you have friends that claim to run crazy amounts of boost on the stock pump, but maybe yours is just weak like bevis said?
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- 2001 Mazda MP3
it was pink/blue wire for A/F
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- 2001 Mazda MP3
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- 2002 BJFW, 2007 BK3P, 1979 SA22C, 2005 BK3P
BTW - even with a fuel pressure regulator running pig rich, without an inline fuel pump you will run lean under boost. even with the voltage clamp AND a wideband. StuttersC had this problem - could not hit above 60psi of fuel pressure. you need between 88psi and 90psi of fuel pressure for 8 psi of boost..
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- 02 1500 4x4, mp3
matt when i ran my stock pump when i got to above 6psi my car ran lean. after getting walbro pump i have gone up to 9psi running rich. after thinking hard about it possibly is the problem. if anything, you can come down to houston and install my afpr on your car an see what happens. maybe someone closer to you can help you out.
