helgeseg wrote:Steve,
Right now I'm using the old relay circuit (relay #1 on your SC) for fuel pump power and it works fine, but I'd like get fuel pump power from the DME relay. The reason for this is that I think the DME provides a rev limiter (right?) and it just seems like the right thing to do.
On the SC, fuel pump power is controlled by the rev limiter and air flow sensor plate inputs, so I'm guessing there are similar control inputs for the DME.
Erik
Erik:
I'm not sure about SC engines, but on most (if not all) Motronic - DME systems, the rev-limiter is electronic and is spark, not fuel, limiting.
So, if the car is running fine, and the rev limiter on the Motronic system is functioning and matches the "safe" high-rpm of your engine, you should be good to go. I.E. if the rev limiter is set to 6500 RPM, and your engine's red-line is 6400 to 7000 rpm (like my 944), it should all be okay.
Just my observations from a 944 with Bosch Motronic DME.
Dan Chambers"It's
just a "well prepared" street car ... or a very, very well-mannered track car."
1983 SC #91 3.6L, "Black Pearl" Livery
1987 944 (gone but not forgotten)