Changed injector size = no start
#1
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Changed injector size = no start
I swapped out my Supra injectors for brand new high ohm RX-7 550s, and now I am getting a no start.
I am using the DIYPNP startup map w/460cc injectors and I switched Req fuel to reflect the injector change.
Is there any other setting I should have to change in Tunerstudio to get it to start?
I am using the DIYPNP startup map w/460cc injectors and I switched Req fuel to reflect the injector change.
Is there any other setting I should have to change in Tunerstudio to get it to start?
#2
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Nobody? Can anyone offer any insight as to wether or not I need to adjust my priming and cranking pulse widths after changing the injector size? I have read the tuning manual on msextra, but I will be the fist to admit that I am a complete when it comes to this stuff.
My understanding is that Req fuel compensates for the larger injector. The car started with my 305cc injector, with the 550's it smells rich.
Any insight would be greatly appreciated.
My understanding is that Req fuel compensates for the larger injector. The car started with my 305cc injector, with the 550's it smells rich.
Any insight would be greatly appreciated.
#5
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it was running ok, key word running. The injectors are high ohm, I set the req fuel using 14.7 and with the Supra injectors the number was 8.50ms with the 550s it comes up with 4.90ms.
My cranking pulsewidth table is what came in the DIYautotune base map:
Coolant(f) Cranking PV
10 ............. 326
30 ............. 301
50 ............. 276
70 ............. 251
Etc.....
My cranking pulsewidth table is what came in the DIYautotune base map:
Coolant(f) Cranking PV
10 ............. 326
30 ............. 301
50 ............. 276
70 ............. 251
Etc.....
#8
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Yes, without a doubt that was not enough fuel. A req_fuel closer to 7 should get you back close to where you were before.
This assumes that nothing else was changed or damaged during your swap.
This assumes that nothing else was changed or damaged during your swap.
#9
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Thanks for the answers, they helped me find my math error...or should I say data entry error, it helps if you set the number of cylinders correctly
Req fuel works much much better with good input, it came up with 7.6 instead of 4.9.
Thanks again for the help.
Req fuel works much much better with good input, it came up with 7.6 instead of 4.9.
Thanks again for the help.
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