87 951 VEMS Install
03-20-2018, 11:01 PM
#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?
03-22-2018, 03:08 AM
#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"
03-22-2018, 10:35 AM
#141
Drifting
03-22-2018, 11:07 AM
#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.
03-22-2018, 01:58 PM
#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.
03-22-2018, 02:08 PM
#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.
03-22-2018, 08:52 PM
#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.
05-05-2018, 07:12 PM
#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