MS PnP 90/93 modded with VTPS won´t start
 

I already posted thsi on m.net but it seems nobody ever before had this problem:

Hi,

got a little problem out there.

My car (see it as a 90-93) had a complete engine rebuild during some months til now. Until restart, I did the VTPS mod to the MS meanwhile.
Now back on and all together again the car doesn´t start at all.

The fuel pump doesn´t start and the engine therefore doesn´t fire up.
I already wrote Matt at DIY AT and he told me to disconnect the normal TPS which is fitted.

I did and nothing happend.
I bridged GND and F/P on the diagnostics connector under the hood, the fuel pump permanently runs (and delivers fuel to the rail), but the car doesn´t start.

The car is fitted with a LC-1 (which I ran together with the unmodified MS PNP before the rebuild) and NO OEM O2.

Is there something I forgot??


I tried to start with a 90`s ECU (with AFM) which I have, but the same.

I also connected the 10A fuse under the hood, which is necessary for the OEM ECU (which has to be removed when using the MS PNP).



I have a Fuji ITB Kit lying around which should be installed when the car has proved for 1000mls that it´s all ok with the engine.

Would be glad for help

It makes me sad.

My laptop has connection to the MS, so that thing is working.

I tested the MS with removed AFM and stock ECU with AFM.

Would calibrating the TPS have anything to do with it?

Hmm, there is no TPS. I disconnected it.

The starting try with the stock ECU has been done with the stock TPS.

Sounds like perhaps a no spark situation, does the MS show RPM on your laptop? Have you checked for spark?

MS shows RPM, but (as I found out today) only 1 and 4 have spark.

Bad ignitor?

did you update the firmware to delete the AFM with the ignitor plugged???

Think we got it.

Got the message today that Q5 on the daughterboard was dead. So it seems I forgot the fuse in the fuse box under the hood...:noob:

I did a firmware update, but with the ignitor plugged off.

For security I already changed the coils and will do this to the ignitor, too. For cases like these, I´ve got them things lying around.

Got it.

I killed the transistor Q5.

Updated firmware aaaaaand "vroom" ;)

Thanks everybody!