I purchased an MS2PNP Kit (DIYPNPB55-K) and assembled it a few months ago. It worked just fine for a few months with my modified E30 ( 2.9L Stroker engine, but stock wiring / sensors except for wideband 02 and AFM delete). One day I was teaching a friend to drive stick at the car stalled out and wouldn't start again. I was getting rpm signal, and the dash showed the MS giving fuel and it gave a readout for ignition advance. Turns out there was a no-spark condition ( grounded the plug to the frame and got nothing). I put the original motronic back in and it fired up just fine - so the hardware and wiring is still "good".
My initial thought was the BIP373 ignition driver, so i replaced that, but it didn't fix it. Currently, in the car I will get proper voltage at the ignition coil with the ignition on, but I get no significant voltage reading ( via multimeter) from the plug wires. Any help would be appreciated.
Current Tune and a datalog while cranking are provided below.
E30 MS2PNP No Spark
Moderators: jsmcortina, muythaibxr
E30 MS2PNP No Spark
- Attachments
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- 2018-02-23_17.20.24.csv
- Datalog while trying to crank
- (22.5 KiB) Downloaded 22 times
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- 2018-02-24_11.08.40.msq
- Current Tune on Vehicle
- (116.95 KiB) Downloaded 20 times
Re: E30 MS2PNP No Spark
do you get sparks when using test mode?
1990 bmw 320i daily driver with m20b25 ms3 sequential fuel, 380cc injectors, d585 coil near plug, home made cam sync, launch control, fan control, vss, homebrew egt logging what's next????
Re: E30 MS2PNP No Spark
Since I am still running a distributor, is there a good way to check that short of pulling all the plugs? If not I will pull the plugs and check.
In test mode I hooked up a multimeter to my coil outlet and didn't see any change in voltage, but that test may not tell me anything aways.
In test mode I hooked up a multimeter to my coil outlet and didn't see any change in voltage, but that test may not tell me anything aways.
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Re: E30 MS2PNP No Spark
You could put a single plug on the coil lead.
Do not load someone elses tune and expect it to work for you!
Re: E30 MS2PNP No Spark
Tested with a spark plug directly on the coil lead and grounded to the engine. with settings on "going high" and "going low" there was no spark using the test mode.
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Re: E30 MS2PNP No Spark
How about a bad coil?
You could remove the coil and see whether you get any change on the output when using test mode. You could probably use a light globe (or maybe a LED) on the output to visually check it.
You could remove the coil and see whether you get any change on the output when using test mode. You could probably use a light globe (or maybe a LED) on the output to visually check it.
Do not load someone elses tune and expect it to work for you!
Re: E30 MS2PNP No Spark
the coil and ignition system works just fine with the stock motronic system
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Re: E30 MS2PNP No Spark
Ok, so it's got to be either the BIP, or the output itself.
You will need to test them both.
You will need to test them both.
Do not load someone elses tune and expect it to work for you!
Re: E30 MS2PNP No Spark
Thanks for the help!
Ended up figuring it out. The spark output on the adapter board was bad. I was getting +12V at pin 48 of the microsquirt, which continues onto the main board. Had 0.8V after the resistor and the transducer set it to either 1.6 or 0.8V depending on if test mode was on or off. Got the proper 0.8V at the pin 1 solder joint on the adapter board, but nothing on the ACTUAL wiring harness adapter on the board.
I soldered a jumper wire from the pin 1 solder joint on the adapter board to the pin 1 on the wiring harness adapter itself, and she fired right up. I suppose one of the internal circuit traces went bad somehow.
Ended up figuring it out. The spark output on the adapter board was bad. I was getting +12V at pin 48 of the microsquirt, which continues onto the main board. Had 0.8V after the resistor and the transducer set it to either 1.6 or 0.8V depending on if test mode was on or off. Got the proper 0.8V at the pin 1 solder joint on the adapter board, but nothing on the ACTUAL wiring harness adapter on the board.
I soldered a jumper wire from the pin 1 solder joint on the adapter board to the pin 1 on the wiring harness adapter itself, and she fired right up. I suppose one of the internal circuit traces went bad somehow.