1990 on speedy efi won't start, but starts on OEM ecu.
09-15-2020, 09:14 PM
#1
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1990 on speedy efi won't start, but starts on OEM ecu.
Hey everyone. I know this is fairly unconventional but desperate times..
So, decided to turbo my miata, blah blah blah. Everything all good to go, but now it won't start on the Speedy EFI PNP. Starts fine on factory ecu, I can't for the life of me figure out what's going on. Willing to pay for the right information or someone to fix it.
Thanks in advance. I'll answer any questions if sent to me in a dm or on the post.
So, decided to turbo my miata, blah blah blah. Everything all good to go, but now it won't start on the Speedy EFI PNP. Starts fine on factory ecu, I can't for the life of me figure out what's going on. Willing to pay for the right information or someone to fix it.
Thanks in advance. I'll answer any questions if sent to me in a dm or on the post.
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09-15-2020, 09:41 PM
#2
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Join Date: Oct 2018
Location: Tampa FL
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This should probably be moved to the general ECU forum.
Not very familiar with speedy EFI, but I took a look at the 90-93 base tune they have listed on their site. The top left VE value is maxed out at 200 and I believe that is usually the value the car tries to inject when you crank the car along with the fuel modifier. That seems like such a high value that it would flood the car, however the req fuel equation looks super borked to me unless you fill it out by hand. The injector size is listed as 30 cc and the engine displacement is 351 cc. I would be amazed if any car started with these settings, you should upload your current tune to see if its the base tune I found on their site.
Not very familiar with speedy EFI, but I took a look at the 90-93 base tune they have listed on their site. The top left VE value is maxed out at 200 and I believe that is usually the value the car tries to inject when you crank the car along with the fuel modifier. That seems like such a high value that it would flood the car, however the req fuel equation looks super borked to me unless you fill it out by hand. The injector size is listed as 30 cc and the engine displacement is 351 cc. I would be amazed if any car started with these settings, you should upload your current tune to see if its the base tune I found on their site.
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09-16-2020, 01:16 AM
#3
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This should probably be moved to the general ECU forum.
Not very familiar with speedy EFI, but I took a look at the 90-93 base tune they have listed on their site. The top left VE value is maxed out at 200 and I believe that is usually the value the car tries to inject when you crank the car along with the fuel modifier. That seems like such a high value that it would flood the car, however the req fuel equation looks super borked to me unless you fill it out by hand. The injector size is listed as 30 cc and the engine displacement is 351 cc. I would be amazed if any car started with these settings, you should upload your current tune to see if its the base tune I found on their site.
Not very familiar with speedy EFI, but I took a look at the 90-93 base tune they have listed on their site. The top left VE value is maxed out at 200 and I believe that is usually the value the car tries to inject when you crank the car along with the fuel modifier. That seems like such a high value that it would flood the car, however the req fuel equation looks super borked to me unless you fill it out by hand. The injector size is listed as 30 cc and the engine displacement is 351 cc. I would be amazed if any car started with these settings, you should upload your current tune to see if its the base tune I found on their site.
What we need is the exact tune OP is using and a datalog of him trying to start it.
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09-16-2020, 09:01 AM
#5
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Join Date: Oct 2013
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You need to check overthe base tune.
Also, are the temperature sesnors and such reading somewhat correctly in tuner studio? That will tell you if things are hooked up right or not.
Did you pull the ST Sig fuse?
Also, are the temperature sesnors and such reading somewhat correctly in tuner studio? That will tell you if things are hooked up right or not.
Did you pull the ST Sig fuse?
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