Quote:
Originally Posted by BigGuy
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Old dog. - are you running a rev limiter?
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I have an EEC IV A6L. I have a quarter hoarse chip that I never did get around to finishing my changes and tuning it. It is my understanding that the factory tune is set to rev limit at 7000. I have hit it a couple of times by mistake, and I was around 7000 rpm. I have no doubt it works, but I got out of the throttle instantly, so I do not know for certain how well it holds the rpm at the limit.
I intend to test it by temporarily setting it down around 3000 rpm, but I have not done that yet. Turning the spark and/or injectors off and on to control rpm seems like something I don't want to do to my engine at WOT and 7000 rpm.
So in short I think all Ford factory MP EFI systems have a rev limit in them since at least 1989. Possibly earlier throttle body did as well, but I know nothing about them.