87 951 VEMS Install
#137
Rennlist Member
I'm running wasted spark as well. --> https://rennlist.com/forums/944-and-...l#post14325562
Attached is my current config file. Though it's for a NA and I use the ICV, but Starting/Idle shouldn't be much different.
Unfortunately I can't open your uploaded config file, it seems to be corrupt.
Attached is my current config file. Though it's for a NA and I use the ICV, but Starting/Idle shouldn't be much different.
Unfortunately I can't open your uploaded config file, it seems to be corrupt.
Seems like your settings for start up and idle helped my issue a bit. I copied over your priming, starting, warm up, crank and aftterstart. Just modified afterstart settings to 100 cycles each. Not sure what settings that is for though. Anyone car to explain?
#139
Rainman
Rennlist Member
Rennlist Member
on mine where the ECU sits under the steering wheel i got a long O2 sensor extension cord (ebay), ran it from approximately the stock O2 sensor location, over to the battery cable grommet, then behind the firewall/cowl over to the windshield wiper wire grommet and down inside.
on a late 944 i'd think you could cut a slit and squeeze the O2 wire into the "DME harness accordion grommet"
on a late 944 i'd think you could cut a slit and squeeze the O2 wire into the "DME harness accordion grommet"
#141
Drifting
#142
Three Wheelin'
Though, If I had the engine out/more space, I'd drill a dedicated hole in the firewall and install a large grommet to accommodate any additional wiring. I plan to run a spare +5V reference wire from the VEMS for use with extra temp/pressure sensor sensors for datalogging temperatures/pressures at various points in the intake/intercooler system for testing purposes.
#143
Rennlist Member
This is the easiest solution, I ran my EGT and oil temp sensor wiring the same way.
Though, If I had the engine out/more space, I'd drill a dedicated hole in the firewall and install a large grommet to accommodate any additional wiring. I plan to run a spare +5V reference wire from the VEMS for use with extra temp/pressure sensor sensors for datalogging temperatures/pressures at various points in the intake/intercooler system for testing purposes.
Though, If I had the engine out/more space, I'd drill a dedicated hole in the firewall and install a large grommet to accommodate any additional wiring. I plan to run a spare +5V reference wire from the VEMS for use with extra temp/pressure sensor sensors for datalogging temperatures/pressures at various points in the intake/intercooler system for testing purposes.
In order to run O2 wire through, you will need to de-pin connector. I did mine this way. I will also be adding in a few sensors also. Oil/ Fuel Pressure and Oil temp.
#144
Race Director
I couldn't get the connector pins to come out so I cut the connector and bought a new connector/new pins and ran it through and reconnected in once it was in the footwell.
#146
Instructor
I have not installed mine yet but was able to de-pin the connector on the VEMs side (you need to slide out a small purple retainer clip to do so) and plan to run it through the DME accordion grommet.
#149
Instructor
So just installed VEMS on my 88 951s. So far so good; car started right up and Peep's instructions (although pretty high level) were sufficient.
One thing that I noticed was a lot more fluctuation in the tach, both at idle and at steady highway speeds.
Have others noticed this and wondering if its a simple fix.
Thanks
One thing that I noticed was a lot more fluctuation in the tach, both at idle and at steady highway speeds.
Have others noticed this and wondering if its a simple fix.
Thanks