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Old 01-20-2013, 08:18 PM   #1
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Default Fuel Tuning issue

Ok, I have a 95 Z28 M6. Its a 383 with 30# injectors. first, how do I determine the pressure they are putting out? Next I was wondering if the closed loop timer is supposed to be in the 200s? I have tunercats and am going through the fuel trims and adjusting.
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Old 01-21-2013, 02:06 AM   #2
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Default Fuel Tuning issue

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Originally Posted by tarheelsoldier View Post
first, how do I determine the pressure they are putting out?
Fuel pressure isn't determined by the injectors, it's determined by the fuel pressure regulator (provided the fuel pump is working properly and can supply adequate pressure). If you haven't changed the FPR, you shouldn't need to change this. But if you are looking to get an exact number you need a fuel pressure gauge connected to the fuel rail. You would be looking for fuel pressure at prime (key on engine off), NOT while idling.

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Originally Posted by tarheelsoldier View Post
Next I was wondering if the closed loop timer is supposed to be in the 200s?
That sounds about right (not home to double check that for you), but it's not very critical. Just a timer to delay going from open to closed loop after starting.


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Old 01-21-2013, 11:50 AM   #3
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Closed loop timer seconds based on coolant temp. Cold = 214, warm = 206, hot = 52
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