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,

 

i would say maybe a bad jacobs ignition. try unplugging it. you don't really need one with a N/A car

 

What size Walbro?&nbsp 255?&nbsp If it is, it's way too much fuel for your engine.&nbsp Switch back to your stock fuel pump, I'd bet it'll go faster.&nbsp Who told you to go with the Walbro?



-Ted

 

I am putting a Walbro on my Turbo II, but I wouldn't put a big walbro on an n/a

 

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.

 

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.&nbsp More pressure, more fuel...

Did the car run fine before your fuel pump died?&nbsp Did the car always bog after the Walbro install?



-Ted

 

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?

 

****, I needed to reread the original post...
YOu have a problems with the secondary fuel injectors firing.&nbsp It sounds like an electrical problems somewhere.&nbsp Electrical prolems are always a nightmare to troubleshoot.&nbsp Start with the Mazda FSM and check reistances and voltage at the pin-outs at the ECU...



-Ted

 

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.

 

Cause the "4kRPM" is the key...that's the fuel injector crossover.&nbsp You said you can rev through at light throttle, but it dies at WOT.&nbsp 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

 

Ted all I got to say is YOU DA MAN! I never thought about the injector crossover. I hope your head did not enlarge to much!

 

I don't do this in real life, but I do play one on TV...



-Ted