Fuel inject run out of control - Miata Turbo Forum - Boost cars, acquire cats.

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Old 01-10-2014, 07:23 AM   #1
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Default Fuel inject run out of control

I have tried all I can but the problem still.


The car go super rich and thick white smoke coming out from the back. wideband meter point from 14 and move slowly to 10 .

Tried once , the wideband meter suddenly pointed to 19+ and not responding anymore and the white smoke gone and run fine.

Have checked cylinder compression shows balance on all 4 cylinder. Have changed the MS tune, have changed the spark plug, injector, COP, wideband sensor, and also changed to my old MS2 from my MS3X. The problem still.

Any Idea?

Thanks
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Old 01-10-2014, 04:48 PM   #2
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Post a tune and datalog of the problem.
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Old 02-13-2014, 12:12 AM   #3
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after done a few check, I found the problem is from the MS3X.

The problem now is cylinder 1 has a higher voltage (4.xx V) than the other 3 (1.xx V) at idle. Flooding the cylinder1.

The smoke from MS2 was the remaining fuel from flooded cylinder1.

The resistance on the lowest chip in the pic (in the blue ugly circle I drawn) was around 10 time lower than the other 3.

So is it the hardware failure ?
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Fuel inject run out of control-ms3x-jps.png  

Last edited by oprso; 02-13-2014 at 12:23 AM.
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Old 02-13-2014, 10:48 PM   #4
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Or can I use injector 5-8 and leave 1-4 alone?
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