Bucking at full throttle? what do I do
#29
Its that stupid fuel pressure regulator that comes with the kit, same thing happend to me. you have the fuel lines mixed up. Rev2Red wrote this to me when I posted the same question on miata.net. He said "Go over the FMU and make sure the lines are correct. It should be tapped into the return line. So the line comming off the far end of the fuel rail (firewall) should be going into the offset fitting on the FMU. Then the center fitting should be going back the the hard line." and bam!!! my car was hauling ***!
#31
At about 4000 RPM, you are probably going to open loop on the ECU. If you are not running an O2 clamp, you probably have pretty high fuel pressure at that point when the ECU moves from trying to maintain Stoich with the oxygen sensor to a preprogrammed map. This extra fuel can cause a lack of power until your engine brings the AFR up as the RPM's (and fuel requirement) increases.
#32
At about 4000 RPM, you are probably going to open loop on the ECU. If you are not running an O2 clamp, you probably have pretty high fuel pressure at that point when the ECU moves from trying to maintain Stoich with the oxygen sensor to a preprogrammed map. This extra fuel can cause a lack of power until your engine brings the AFR up as the RPM's (and fuel requirement) increases.
-LAZ
#35
I'm boosting 6psi by about 3000 and the air/fuel meter is sweeping away. At 4000 it drops off the scale red till about 4500-5000 then it goes into green and the power comes back. Between 4000 and 4500/5000 I'm running on borrowed time. bye bye pistons if I can't sove this. Explain the egr clamp? What exactly is that? I'll have the AEM EMS in about a month but untill then is there a "quick fix" that might help?
-LAZ
-LAZ
#36
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Its that stupid fuel pressure regulator that comes with the kit, same thing happend to me. you have the fuel lines mixed up. Rev2Red wrote this to me when I posted the same question on miata.net. He said "Go over the FMU and make sure the lines are correct. It should be tapped into the return line. So the line comming off the far end of the fuel rail (firewall) should be going into the offset fitting on the FMU. Then the center fitting should be going back the the hard line." and bam!!! my car was hauling ***!
I'd like to know if chowder fixed the problem....
#38
I don't think it would be the plugs. Incomplete combustion should read rich on the gauge then wouldn't it? But it's easy enough to try. What gap is suggested? Just to verify... The fuel into the regulator is on the side and the outlet (return) is on the bottom? I think I tried it both ways with no noticable change. Read: "same problem" My fuel pump is OEM and dead-head pressure is about 80-85 psi depending if the car is running or not. Ironiclly it's higher while running. I would think the pressure would be a bit lower being that the engine is using fuel but it could be due to the voltage being higher while running.
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09-30-2018 01:09 PM