502 Mpi- Raise Idle ?
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502 Mpi- Raise Idle ?
I have three 502 MPI Magnums (circa 1998) in my boat. Any way of raising the idle on these? i'd like to raise them 200 RPM's for better control while docking but don't want other complications as they run good otherwise
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If I remember correctly Theseus a screw that is locked in place from the factory that can not be changed. I am sure you can change it through the comp or put a plastic cap on screw and see what rpm rise that gives you. That would be a presidential solution and not the best. What are your Rpm now. You really don't want to go above say 900 or you will kill your drives.
#3
No you cannot do it mechanically because if you open the throttle plate to raise it the computer will shut down the idle air control to bring it back down, and if you reach the end of IAC travel then it will not idle cold. You could have the ECU's tuned with a new idle speed though.
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That's true it would only work while motor was warm. Was tryng to figure way around burning three comps just to change the idle. If the idle is really low on all three but equally low then the are prob set right from factory and truly should be where they are. You don't want to bump those drives to hard and damage them