Issue with engine running

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Issue with engine running

Postby hamish_18 » Fri Dec 22, 2017 1:40 pm

Hi All,

I have a very strange issue going on here. I am running ms3x in a toyota pickup with a 99 2rz engine in it.
The engine and ECU have been together for over 5 years, with well over 50k miles on it.

the engine, harness, and ecu were swapped in to this pickup about 3 months ago. Lately my buddy has said that the rig will just die on him. warm, or cold, it doesn't matter. And it will just crank, but not start for a while.
I have checked the tune, which worked great for me for years, and checked the wiring. Tested injectors, and spark. All seems to be okay. We did notice that at first the spark test wasn't working. but would then started working after a second. Not sure what was up there. I am at a complete loss. Could it be the crank position sensor at all? I assume if this was on its way out, it could exhibit these conditions? I am attaching the tune and a log. There is a mark in the log. Just prior to that it was running, and then died on it's own. There is an attempt to start it just after the manual mark as well.

Thanks.
Attachments
CurrentTune12-22-2017.msq
Current Tune
(275.07 KiB) Downloaded 4 times
2017-12-21_17.54.38.msl
Log
(708.51 KiB) Downloaded 9 times
hamish_18
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Posts: 209
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Re: Issue with engine running

Postby Matt Cramer » Wed Dec 27, 2017 10:01 am

You're getting a steady RPM signal as the engine cuts out, which implies the crank sensor is working fine. Try backing down the dwell - I'm wondering if the coils' internal ignition modules are overheating.
Matt Cramer
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Re: Issue with engine running

Postby hamish_18 » Fri Dec 29, 2017 3:12 pm

Hi Matt,

These COP's have been on this engine for over a year running in the original rig. The dwell hasn't been touched. I guess over time they have gotten older, and now they can't handle the dwell?

Thanks, Chris
hamish_18
Experienced MS/Extra'er
 
Posts: 209
Joined: Mon Dec 12, 2011 12:25 pm

Re: Issue with engine running

Postby hamish_18 » Tue Jan 09, 2018 6:34 pm

Hi all,

Figured out the issue. So the main positive wire going from the body harness to engine harness out to like the COP's injectors, pretty much everything was not making a good connection. Not sure why, but bending the male pin appears to have fixed the issue. He has not had it die on him since. So chalk it up to crappy toyota main harness plugs I guess? lol.

ISSUE RESOLVED.
hamish_18
Experienced MS/Extra'er
 
Posts: 209
Joined: Mon Dec 12, 2011 12:25 pm


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