Haltech - Strange issues with Fuel and bogging on acceleration. Car only idles.
 

I installed a fresh rebuild in my car after finding a blown coolant seal. I'm running an E8 and my mods can be found below. At operating temp ( no correction maps coming into play ) when I give it gas it just bogs and drops to 600rpm, leans out, then comes back. All the cells in the range it's going to and before have been corrected. We haven't worked our way all the way to the end of the map yet. All I'm trying to do at this point is idle and accelerate in neutral while parked.

Timing has been zeroed and verified, spark verified with timing light on leading and trailing, o scope used to verify that the Haltech is sending the same ING ms it was given in the map table. Also fuel pressure has been checked at the FPR. It sits at 40 and only decreases slightly when the accelerator is pressed. I'm a noob and thankfully have a lot of good friends around here helping me but everyones at a loss at this point. For the amount of fuel we're putting in, the car shouldn't even run let alone idle steady at 1500rpm with -6vac and 11.5afr. No matter how much we increase fuel to the next group of cells it moves into it still bogs, reads lean, back fires and shoots a flame, then comes right back. I'm including my map in the hope that someone here can point me in the right direction.

Any suggestions you have would be appreciated. Thanks!


RX7 13BT
LARGE porting
FD rotors
S4 everything else
3mm Apex Seals
TE61
870cc Pri. , 1680cc Sec.
Parallel Fuel Mod, Aeromotive 13109 FPR, Gauge, -6 an Fittings
Haltech E8


This map is far from complete.
Current Map


Edit: Also verified that injector wiring and placement is correct.

After I had a conv with Claudio I found I had the injectors set to the wrong impedance. It made sense at the time that 2 was the proper setting for low impedance injectors but it turns out it should have been set to 8. :wallbash:


Still having bogging issues but I need to play with the timing and fuel all over again. Thanks Claudio!

Engine still hesitates with my injectors set properly. I can't accelerate at all. Fuel pressure is at 35 and increases with throttle. I've searched this section of the forum repeatedly, read threads about throttle tip in and fuel pump settings, timing, etc. I'm not sure what else to try. Any ideas?

Is your TPS installed correctly and correctly calibrated?

Also, the throttle pumps and coolant corrections need to be addressed on any engine. The Throttle Pump settings and parameters on the E8/E11 after v1.71 are very different than before, you need to make sure you're not putting too much fuel or not enough under quick blips of the throttle.

Yes TPS is calibrated. Thanks anyways:)

Thanks Claudio but could you give me an idea of what they should be for my setup? I've gone up and down in small increments. Been as low as .500 and as high as 2.1. Nothing seems to change. I'm also not even trying to blip the throttle. Even slow small movements of the peddle produce the same effect.

Edit - All adjustments were made within the cells the engine was using ( Throttle pump - box highlight blue )

What is the MAP reading at idle, as you ease into the throttle, when you are aggressive with the throttle? Only thing you've mentioned is that you see -6 psi at idle. That's about 12 in/hg which is a very low number to have with a 1500 rpm idle. Either the engine is weak or you have any of a myriad problems with MAP sensor, setup, vacuum signal line, etc. A faulty MAP signal would certainly cause the problems you are experiencing.