Post by moe on Jun 20, 2020 23:56:17 GMT -5
I have a MS2 w V3.0 board set up on a Turbo Ford 2.3. I had some ignition problems earlier this year that caused me to reword everything. I fixed an exhaust leak and went for a test drive and all seemed well. Went to leave the next morning and the engine would start and run some and die. And repeated. TS was showing my TPS was sitting at 0% and then jumped to 15-25% as it died. After some investigating it was doing this just as my wide band was finishing its boot up and came online and started to output 4v to pin 23. I backprobed my TPS and its output was jumping when the 4v from the wideband started. I disconnected the TPS and I saw the whole 4 v coming from pin 22. Disconnected my MS and measured an open between 22 and 23 on the connector and wiring harness. Put my MS on my stim and the crosstalk was there. As I turn the O2 up from 0 to 5v the throttle position goes from 0 to 6% w/o touching the TPS pot. I can’t pull the TPS pot w/o unsoldering. I have the luxury of having a newer MS to compare to and the O2 pot doesn’t effect the throttle position when on the stim. Any ideas? Suggested components to check?
