vr6 supercharged msII v3.0 barely

[mike2coupe]

the motor is vw 2.8l vr6 12v supercharged 8psi running on megasquirt II code ver 1.0.2. pcb v3.0 using all stock bosch sensors. wasted spark driven from 3vb921's. pwm modification to drive throttle body for idle controll. 30# injectors 4bar pressure regulator. lc1 wideband.

starts and idles great runs awesome at low rpms but barely runs above 4k misses pings horribly

[mike2coupe]

here is a datalog starting with a first gear, pull I let off the gas a little when it started messing up about 4100 then a second gear pull let off then gave it more. at the end there are 2 more 2nd gear pulls

[kyle_b]

your pretty lean when coming into boost.

[mike2coupe]

no I am not. its missfiring. missfireing means that the fuel is not burnt. so fresh oxegen goes out the exhaust. passing the oxegen sensor. making a lean reading.

[T3Bunny]

So it appears your using the stock VR6 coilpack. Did you modify it and remove the power stage / ignitor module from it? Using VB921s you need to pull that out and attach to the coils directly, or it will give you issues around 4k rpm... Humm lol.

To clarify for anyone reading this that doesn't know, the VR6 OE coiplack has a built in ignitor module. Its actualy pretty easy to remove this module. If it still has a 5 position black plug, this it the module. Take the bottom plate off the coilpack and a black plastic cover. You will see 4 posts with nylocks on them. This is where you will now attach the coil controls to. You could leave the ignitor in there if you wanted to and just bypass it.

[mike2coupe]

well I did use the stock coil pack with the module removed for a while but now it has chevy coils, with the same problem

[mike2coupe]

well fixed it. the problem was a stipid chinese obx header..... one collecter melted shut restricting 3 exhaust ports
runs great. going to redo the maps.

[Paul_VR6]

Talk about a strange problem, glad it's sorted!

[mike2coupe]

here is the current msq file running great! fast! pings a little on regular good on super unleaded probably 5 degrees too much advance. starts idles great fast idle when cold. post more once the supercharger is reinstalled

[mike2coupe]

figured out the pinging there was a number in the ignition lag set it to 0 and now it seems that i can run more ignition advace.

the car rippin' fast now

here is the latest msq for MSII version 2.1.0