new here! need help with ms2 turbo e28 m30b34

[ralfibimmer]

Soo I'm having some complications with my build the engine idles great but when i rev it it won't go past about 2500-3000 rpm its like the rev limiter is set to that but is not. Could it be fuel cut or spark I just don't really know where to start. Also want to say thanks ahead of time because any info is much appreciated

[M. Holtmeier]

Double check your ignition jumpers. Data log what's going on and post your msq and log file.

[ralfibimmer]

Just to add my ms2 was made by peter Florance as a plug and play with my harness but I'll post my logs later tonight

[M. Holtmeier]

If Peter built it I'm sure the hardware is correct. Did he set you up with a base tune, or did you start one from scratch?

[ralfibimmer]

Yes he did set me up with a base tune I talked him and he seemed suspect it as a fuel issue but at the moment i have no spare injectors to test out. Also I can't seem to figure out how to post my logs

[ralfibimmer]

http://www.msextra.com/forums/viewtopic ... pm+problem
Just found this forum not really sure what the solution was whether it was a diode or capacitor or what can someone do some explaining???

[M. Holtmeier]

That link goes nowhere for me.

[ralfibimmer]

That link goes nowhere for me.

Sorry just edited the link slight discrepancy.

[GI jonas]

Very common problem. I experienced the exact same thing upon initial running of my MS system. Make sure the VR sensor is an appropriate distance from the tooth wheel first of all, and I guarantee you need a 10k resistor in the VR circuit if you don't already. I was never able to get over 2400 RPM until I installed the resistor. Your mileage may vary but that was my exact issue and I recall reading scores of other tales similar.

Is it a PNP? Self build?

[ralfibimmer]

Very common problem. I experienced the exact same thing upon initial running of my MS system. Make sure the VR sensor is an appropriate distance from the tooth wheel first of all, and I guarantee you need a 10k resistor in the VR circuit if you don't already. I was never able to get over 2400 RPM until I installed the resistor. Your mileage may vary but that was my exact issue and I recall reading scores of other tales similar.

Is it a PNP? Self build?

Its a PNP built by peter florance . as far as air gap goes what is the spec for these m30s? And does it matter what side of the vr circuit the resistor is on??

[marc79euro645]

Yes it matters how the vr is wired. Go to the mega manual and read about vr sensor polarity. Getting it wrong screws up dwell, maybe more.
good luck
marc

[ZenitramNaes]

This sounds like a VR problem. I may have missed it, but did you solder in a 18k resistor inline of the VR jumper? Post a photo because now you have me confused with your last comment. Resistors don't have polarity, I don't know what else you could mean.

[Brad D.]

We're going to need more info than that to help troubleshoot the issue. Has the car run correctly before or is this a new MS2 install? Data logs from the issue are extremely helpful as is a copy of your .msq file. Without those it could be a countless number of things.

[ralfibimmer]

This is a new ms2 install. I recently talked to Peter himself and he told me there is a 4.7k resistor for the vr circuit he suggested to increase the air gap so tthat's what I'll do see if that helps but I'll keep you all pposted

[ZenitramNaes]

4.7 seems low compared to my 18k, but I mean I would imagine Peter knows what he is talking about. He is highly experienced in this field, I would heed his advice and then report back.