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Help with 97 Tune

 
Old 08-12-2018, 09:33 PM
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Default Help with 97 Tune

I have a 97 mspnp2, that I some trouble with staring. Normally I need to hold the throttle for the first 10 sec to get it to start and begging to idle. I can not seem to get it to idle right. When I get the car to run low 14 afr I tons of black smoke from exhaust and car will idle about 500 rpm and sound like is wants to die out. If I get the afr at 16 the sound like it running better and rpm around 800~900 rpm.
Anyone willing to look at my tune and give me some advice on what I am f**** up.
97 TD04 diy Turbo set up
Iat
walbro 255 fuel pump
rx8 yellow top 420cc
2.5 custom exhaust

*Idk why, but it started right up this time.
Attached Files
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2018-08-12_20.42.40.msl (1.42 MB, 13 views)
File Type: msq
CurrentTune.msq (117.1 KB, 31 views)
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Old 08-12-2018, 10:17 PM
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Sounds like your wideband may not be calibrated properly.
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Old 08-13-2018, 06:52 AM
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Yep
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Old 08-13-2018, 06:20 PM
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Thought the same thing but still same after calibration. Even put in a new sensor.
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Old 08-13-2018, 07:08 PM
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Are the ECU and the wideband grounded to the same location?
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Old 08-13-2018, 07:18 PM
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Yes, gone through and rechecked all the wiring. calibrated the sensor muti times. Pulled power blue cable on ignition. I de-pined the old o2 sensor and used the connector for my signal to the ecu. Wideband and ecu read about the same.
I honestly don't think it is a wideband problem.

Last edited by MannyMiata; 08-13-2018 at 07:29 PM.
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Old 08-13-2018, 08:52 PM
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Confirm spark on all cylinders. Sounds like one or two of them may be pumping air and raw fuel.
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Old 08-16-2018, 02:28 PM
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Okay, so I checked for spark. I have spark. Swapped my injectors out for the stock ones, thinking maybe a rx8 injectors were getting stuck open. And, nope still same thing. 14-15 afrs black smoke. So at that point, I put the old ecu back in and the car ran fine.
Could required fuel and injector dead affect this?
Wait but i had the same problem with the stock injectors.......
Any other clue
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