Weird buzzing sound and hesitation @ high RPM??
08-26-01, 12:28 PM
#1
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Weird buzzing sound and hesitation @ high RPM??
When I am accellerating, in 3rd and 4th @ around 6000 RPM, it begins to sputter and I hear what sounds like a choppy, sputtering buzzer going off around the area of my left knee (kind of by the stock boost gauge).
This cost me some valuable time last week at the drags. At first, I thought maybe I had a fouled plug so I changed them. It still does it!
I am thinking this has something to do with the amount of boost I am running? It happens at around .9 bar.
Any ideas?
*********** 87 Mazda RX-7 Turbo II ************
*88 J-Spec Engine *TO4 Proturbo *Throttle Body Mod.
*Greddy Turbo Timer *Greddy A/F Meter & O2 sensor *RB Sway Bars
*Greddy FMIC *Greedy Type R BOV *Walbro Fuel Pump *720cc Secondaries
*Apex SAFC *Apex S-AVCR Boost Controller *Apex GT Exhaust
*Bonez Downpipe *Bonez Intake *Bonez Street/Strip Clutch
*ACV Removal *Fuel Pump Re-wire *Ported Wastegate
*Jacobs Rotary Pro Ignition *Magnecore 10mm Wires *RB FCD
*Red Silicone Vacuum Lines *Optima Red Top Battery
*Falken Tires-205/55/R16-Front Nitto NT-555R 225/50VR16-Back
************************************************** **
This cost me some valuable time last week at the drags. At first, I thought maybe I had a fouled plug so I changed them. It still does it!
I am thinking this has something to do with the amount of boost I am running? It happens at around .9 bar.
Any ideas?
*********** 87 Mazda RX-7 Turbo II ************
*88 J-Spec Engine *TO4 Proturbo *Throttle Body Mod.
*Greddy Turbo Timer *Greddy A/F Meter & O2 sensor *RB Sway Bars
*Greddy FMIC *Greedy Type R BOV *Walbro Fuel Pump *720cc Secondaries
*Apex SAFC *Apex S-AVCR Boost Controller *Apex GT Exhaust
*Bonez Downpipe *Bonez Intake *Bonez Street/Strip Clutch
*ACV Removal *Fuel Pump Re-wire *Ported Wastegate
*Jacobs Rotary Pro Ignition *Magnecore 10mm Wires *RB FCD
*Red Silicone Vacuum Lines *Optima Red Top Battery
*Falken Tires-205/55/R16-Front Nitto NT-555R 225/50VR16-Back
************************************************** **
03-29-03, 01:10 AM
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yea sounds like fuel cut , please run stock boost till tou get a fuel controller or bye bye motor ..... the buzzzzz is letting you know to shift "if you want to "buy usually that is where the max torque peak is....dont blow it
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03-29-03, 07:05 AM
#8
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Man! How did you find this thread?
It's almost 2 years old!
A lot has changed since then. No more buzzing noise!
I think that was detonation, but it shouldn't have occured!
I must have had a bad FCD or my 720's werent pumping enough gas. could have also been timing I suppose.
Now I'm running a Haltech with water injection and life is good at 18 PSI!
It's almost 2 years old!
A lot has changed since then. No more buzzing noise!
I think that was detonation, but it shouldn't have occured!
I must have had a bad FCD or my 720's werent pumping enough gas. could have also been timing I suppose.
Now I'm running a Haltech with water injection and life is good at 18 PSI!
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