So my car gets fuel cut at 3500rpm unless I pull the 7.5W fuse for the gauge cluster, then it gets fuel cut at 6000rpm. WTF?

btw I have an rtek 1.7 and it lowers the rpm when the secondaries come online to 3500 instead of 3800. I also have a wideband and I can get afr's around 12-13 until fuel cut I suddenly get no fuel. I can creep past the rpm in question, but if I try to boost past it, fuel cut. if i creep past it, then try to boost, fuel cut again.

I have replaced the tps with no difference, also tried running with a FCD and that did nothing. what could cause this?

 

update:
tried swapping gauge clusters, and no difference.

also tried unplugging all 4 coolant sensors and no difference again.

 

nobody has any ideas?

I'm in over my head here, and all i can think of is that maybe one of the sensors that feeds the gauge cluster info is broken and causing this.

otherwise, could it be the ECU?

 

I would contact Rtek and see what they have to say. Also did you do any rewiring around the car?

 

yea actually, there has been much replacing of wire. I have an safc wired in, and I replaced the driver's side engine harness because the previous owner raped it. the passenger side engine harness was taken out, and re-wrapped by me. This car has also seen 2 engine removals/installs of the same engine in the past 2 years, plus dashboard removal once.

however, all the wiring is stock, the only actual rewiring I have done was the fuel pump, but I did this after I already had this issue, and it did not affect it.

I actually didn't think to contact pocketlogger, I just sent them an email, I'll see if they can help.

 

You'll never work it out unless you get a meter out and probe each pin on the ECU harness and compare it with the FSM.

 

I suppose that will at least tell me if the ECU is good right?

I'll get that done later tonight and see if I can find any discrepancies.

 

Nah man, it would tell you if the harness wiring to the ECU is corrupt or not. NOT if the ECU is good or bad. Wrong wires going to the wrong places will result in the wrong input/output to the ECU.