Need Your Thoughts
#1
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Need Your Thoughts....Power Loss
Okay when I go WOT about 4k the car loses power, you can feel/hear power but you don't go anywhere. It almost feels more like a miss than anything. I just put in a Walbro Pump and the Injectors have been cleaned and blueprinted. Also I have the Jacobs Rotary Master Ignition Pack. If I don't go WOT then I can redline the car without any problem at all. The TPS says that it is okay (LED Test). Any thoughts on this, I would think it is the TPS but need some other input. I want to check my timing but the marks are rusted away. I am ordering a new Pulley today for that problem.
Thanks,
Thanks,
Last edited by Smoke; 04-15-02 at 09:33 AM.
#3
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What size Walbro?  255?  If it is, it's way too much fuel for your engine.  Switch back to your stock fuel pump, I'd bet it'll go faster.  Who told you to go with the Walbro?
-Ted
-Ted
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My OEM pump went south on me, so when ordering my struts from K2RD I purchased the pump. How can it be to much if I have not changed the duty cycle of the injectors? I will admit that I am not a fuel/efi tuning expert. I don't think that it is the Jacobs......well it better not be. You can't just unplug it or I would have done that already.
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Oh man, that's messed.
Technically, it's not supposed to change anything, but the increased fuel capacity of the Walbro fuel pump overpowers the FPR, so the fuel rail pressure goes up.  More pressure, more fuel...
Did the car run fine before your fuel pump died?  Did the car always bog after the Walbro install?
-Ted
Technically, it's not supposed to change anything, but the increased fuel capacity of the Walbro fuel pump overpowers the FPR, so the fuel rail pressure goes up.  More pressure, more fuel...
Did the car run fine before your fuel pump died?  Did the car always bog after the Walbro install?
-Ted
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The car has done this for a while, this has been happening before and after the fuel pump install. So another fuel question then, would aftermarket FPR help this situation?
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#8
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****, I needed to reread the original post...
YOu have a problems with the secondary fuel injectors firing.  It sounds like an electrical problems somewhere.  Electrical prolems are always a nightmare to troubleshoot.  Start with the Mazda FSM and check reistances and voltage at the pin-outs at the ECU...
-Ted
YOu have a problems with the secondary fuel injectors firing.  It sounds like an electrical problems somewhere.  Electrical prolems are always a nightmare to troubleshoot.  Start with the Mazda FSM and check reistances and voltage at the pin-outs at the ECU...
-Ted
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Thanks a lot I will check that this weekend then. Why would you think that I would have that problem at WOT and all the time? So what do you think about the aftermarket FPR to help the pressure in the rail.
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Cause the "4kRPM" is the key...that's the fuel injector crossover.  You said you can rev through at light throttle, but it dies at WOT.  The primaries can shoot enough fuel to rev the engine under very small loads (i.e. not WOT)...
Don't worry about the FPR - that was barking up the wrong tree.
-Ted
Don't worry about the FPR - that was barking up the wrong tree.
-Ted
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