vt10vt wrote:Grillage wrote:I think the Fuel Pump channel was doing something wonky, maybe not grounding properly?
What fuel pump are you running and did you have to re pin the harness with the new ECU? I had issues with the standard issue VEMS fuel pump trigger running my Walbro 400 and had to use an injector driver, but if that's the issue you'd have had to repin the FP relay trigger.
Grillage wrote:vt10vt wrote:Grillage wrote:I think the Fuel Pump channel was doing something wonky, maybe not grounding properly?
What fuel pump are you running and did you have to re pin the harness with the new ECU? I had issues with the standard issue VEMS fuel pump trigger running my Walbro 400 and had to use an injector driver, but if that's the issue you'd have had to repin the FP relay trigger.
I am also running a Walbro. I had to move the fuel pump signal from EC36-15 to elsewhere - I used EC36-3 and it seemed to solve the problem
It had been behaving this way prior - I wasn't sure if it was "normal" due to being a big ass fuel pump and a FPR that I've never dealt with:
Afterthought wrote:Theres something funny about VEMS and the drivers like P259 .
I’ve had issues with mine as well, not working properly with my cooling fan.
Good to hear you got it running , probably time to get some test drive and seat the rings
ChrisAudi80 wrote:You should not use P259 for switching relays. They are sensitive to voltage spikes and backfeed (?).
When I made a dedicated relay for the fuel pump, I changed FP out from 36-15 to 36-9. Injector output seems to work way better.
A coil driver doesn't always work because it is logic level IIRC.
Marc wrote:correction: you had f6dtc. which is a non resistor plug. the "r" denotes resistor.
Grillage wrote:Also solved my overboost problem - the signal to the N75 needed to be inverted. When the engine was running it was CLOSING the N75 and not letting air from the turbo to the WG - so it never opened up.
Grillage wrote:Thanks guys!
Just tested the latest config from Marc and now we're turned up to about 275 kpa (25psi or so) and the car is running beautifully.
I want to take the JHM short shifter from the cabriolet and put it on this car - the shifter is a bit sloppy.
also, here it is all prettied up in the driveway:
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