More Help please: Now it starts but runs rough
09-26-2003 | 04:31 PM
#16
Thread Starter
Rennlist Member
Joined: Jun 2001
Posts: 1,576
Likes: 57
From: SF Bay
Intercooler pipes are tight.
Temp sensor is plugged in
Throttle body hoses are connected. Particularly the bugger underneath. (which is a very accurate description of it)
All is well there. But now the problem remains that it will no longer spark again. We bypassed the alarm once, and it started. And it kept starting up every time after that.
Sat overnight and now no start again. No spark at the coil. Coil has 12v when ignition is on, however.
Temp sensor is plugged in
Throttle body hoses are connected. Particularly the bugger underneath. (which is a very accurate description of it)
All is well there. But now the problem remains that it will no longer spark again. We bypassed the alarm once, and it started. And it kept starting up every time after that.
Sat overnight and now no start again. No spark at the coil. Coil has 12v when ignition is on, however.
09-26-2003 | 06:48 PM
#17
Thread Starter
Rennlist Member
Joined: Jun 2001
Posts: 1,576
Likes: 57
From: SF Bay
OK, so I'm still tracing the no start problem and testing the wiring at the DME for the ref sensors based on this I found in another thread.
" The only problem would be how to tap into those signals without cutting up the harness."
"unplug the DME from the connector and just crank the engine while testing pins #8 &27 (speed) and #25 & 26 (reference). This will ensure at least that the signal makes it through all the wiring. I think the book says minimum 2.0v peak to peak. "
I don't have a scope but using a voltmeter I get activity but not 2.0v worth.
.05V, .1V... but not 2.0V.
Since I'm not using a scope, it's hard to say if that's just the voltmeter not reading the peaks as they go by so fast. But if anyone can confirm one way or another whether a voltmeter should be able to read the 2.0v peak to peak, that would be helpful.
" The only problem would be how to tap into those signals without cutting up the harness."
"unplug the DME from the connector and just crank the engine while testing pins #8 &27 (speed) and #25 & 26 (reference). This will ensure at least that the signal makes it through all the wiring. I think the book says minimum 2.0v peak to peak. "
I don't have a scope but using a voltmeter I get activity but not 2.0v worth.
.05V, .1V... but not 2.0V.
Since I'm not using a scope, it's hard to say if that's just the voltmeter not reading the peaks as they go by so fast. But if anyone can confirm one way or another whether a voltmeter should be able to read the 2.0v peak to peak, that would be helpful.
