No start w/ MS Parallel
05-01-2009, 08:53 PM
#1
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No start w/ MS Parallel
Just built my MS again. Now I have a no start. Figures I'd ask here while I troubleshoot myself.
With the MS attached to sensors only I get a crank no start. If I disconnect only the shielded tach signal wire, it starts no issue.
MS is in parallel w/ stock ECU. The harness in the car is the same that I've been using for a while. I've checked all pins to ground, re-cleaned the PCB, and went over my tach input wiring. Still looking....
--Alex
With the MS attached to sensors only I get a crank no start. If I disconnect only the shielded tach signal wire, it starts no issue.
MS is in parallel w/ stock ECU. The harness in the car is the same that I've been using for a while. I've checked all pins to ground, re-cleaned the PCB, and went over my tach input wiring. Still looking....
--Alex
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05-01-2009, 08:55 PM
#3
Boost Pope
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I'm confused.
If you disconnect the tach wire from the MS, and the car runs, this means that the injectors and ignition is still connected to the stock ECU, yes?
If you disconnect the tach wire from the MS, and the car runs, this means that the injectors and ignition is still connected to the stock ECU, yes?
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05-01-2009, 09:03 PM
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Just rung out from the shielded input pin 24 to the opto isolator. Resistance is good, and open to grd.
TACHSELECT to OPTOIN is jumpered. D1 and D2 are jumpered. C12 and C30 are not installed.
-Alex
TACHSELECT to OPTOIN is jumpered. D1 and D2 are jumpered. C12 and C30 are not installed.
-Alex
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05-01-2009, 09:17 PM
#8
Boost Pope
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Ok. Not sure how I helped, but you're welcome.
I'm unclear as to whether you have the injectors and ignition wired to both the MS and the stock ECU at the same time, or are you swapping the wires back and forth?
I'm unclear as to whether you have the injectors and ignition wired to both the MS and the stock ECU at the same time, or are you swapping the wires back and forth?
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05-01-2009, 09:20 PM
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Sounds like he was running the car off the stock ecu for now but had the MS connected for monitoring to make sure all systsems were go, meaning all gauges including tach were working before switching spark and fuel over to MS?
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