Hi guys, i need some help and any would be greatly appreciated. I did an SR20DET swap a few months back and then wanted to go faster so I started with some upgrades. I put in Nismo 555cc injectors, Z32 MAF, Front mount intercooler, HKS SSQV bov and an Apexi S-afc. I finally finished with all of that today and tried to start it. Baby started on first turn. Jumpy idle but was working fine when engine was cold. I shut it down to go grab something in the house and came back and tried to start it again... Did start, but black smoke out of exhaust...?? barely holding on at about 200-300RPMs. When you try to give it some gas it goes up to around 2k and then bogs and dies. I did reset the S-afc to factory defaults.Here are some things i noticed but dont know if it should be like this... 1) when you blow into the bov it lets air through. Normal????2) The injectors didn't get sucked into the rail like the stock ones. Normal??3) The MAF plug had 2 grounds. I wired them together. Is this right?
Once again any help would be appreciated THANKS TONS!!!
Sr wont start after some upgrades
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SpeedRacer1
- Posts: 3144
- Joined: Fri Jul 26, 2002 7:44 pm
- Car: 1990 240SX, G35
MAFS circuit is messed up and the ECU is in fail safe mode. Set the SAFC to what its supposed to be at, not factory, otherwise nothing will run right. You may have a one time problem, try resetting the ECU. If the problem continues recheck your MAFS wiring.
When the ECU is in failsafe, it only lets the engine run to 2000 RPM's then cuts.
When the ECU is in failsafe, it only lets the engine run to 2000 RPM's then cuts.
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SpeedRacer1
- Posts: 3144
- Joined: Fri Jul 26, 2002 7:44 pm
- Car: 1990 240SX, G35
This should work...http://www.240sx.org/faq/articles/ecm_reset.htm
Re: (SpeedRacer1)
ya your mafs wirind is definately wrong, i'm pretty sure that on of the grounds go to a chassis ground and the other goes to the black wire on your harness.
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240 Doubledrive
- Posts: 44
- Joined: Thu Jun 10, 2004 2:21 am
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SpeedRacer1
- Posts: 3144
- Joined: Fri Jul 26, 2002 7:44 pm
- Car: 1990 240SX, G35
The SAFC wasnt designed to run higher injectors. It only changes airflow signals. But some people manage to use it to run 550/555's by simply turning most of the setting up the the highest setting which is around 150% iirc. Seeing as how 550's are about 150% larger than the stock 370's it supposedly works out, not sure how well though.