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post #1 of (permalink) Old 06-19-2003, 10:42 AM
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MPI Throttle - Too Sensitive!

Anyone running the Hesco MPI kit on their Wrangler?
Anyone found a fix the the race-car sensitivity to the throttle?

My 4.2 is balanced and blueprinted with a ported and polished head. It revs so fast I am going to break something on the trail.
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post #2 of (permalink) Old 06-19-2003, 11:17 AM
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Re: MPI Throttle - Too Sensitive!

If you are refering to the tendency for your foot to bounce on the throttle while off-road, Install a second throttle return spring. Or even a third. Then over time, you either learn to feather the throttle more, or the throttle becomes less sensitive.

If you do a search, about 3 or 4 years ago, I posted the exact question.
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post #3 of (permalink) Old 06-19-2003, 11:25 AM
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Re: MPI Throttle - Too Sensitive!

1. Ain't that a great problem to have?
2. It's a far cry from the problems the BBD presented!
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post #4 of (permalink) Old 06-19-2003, 11:35 AM
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Re: MPI Throttle - Too Sensitive!

As for the feathering of the throttle... It was scary when my wife drove it yesterday. She started to "throttle bounce" in first gear and left a strip of rubber all the way through an intersection! That's with Dana 44's with 35" tires! I was sitting in the passenger's seat praying, "God, please let my axle survive this trial by fire".

I'll try adding tension on the spring-return.

And yes it is a good "problem" to have. I rebuilt the old carb 3 times and replaced it once.

Thanks and I'll let y'all know if it works.
post #5 of (permalink) Old 06-19-2003, 11:45 AM
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Re: MPI Throttle - Too Sensitive!

Ya oughtta try with the AMC 20 in the back! I'm surprised mine is still alive. LEVE is right, it's a better problem than the BBD! Anyway, I had the same problem and someone told me about the additional return spring. I found an extra drum brake spring in the trunk of my 55 Bel Air I'm restoring and used that. Worked like a charm!
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post #6 of (permalink) Old 06-19-2003, 03:19 PM
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Re: MPI Throttle - Too Sensitive!

Agreed, same issue when I first swapped in the 4.0L I've just become really good with it now.
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