hard time with my 86 stang

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wannabe - 02 Apr 2006 04:30 GMT

trying to upgrade to a 65mm throttlebody and having idle problems with
some back firing and rpm fluctuating any suggestions

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Backyard Mechanic - 02 Apr 2006 05:09 GMT

> trying to upgrade to a 65mm throttlebody and having idle problems with
> some back firing and rpm fluctuating any suggestions

Well, if that's the only change you're making... that's the problem.

That's a speed density ECM and touchy to set up correctly becuase it
changes airflow per throttle angle.

You have to get the engine warmed then set up your base idle to about 550
rpm with the ISC disconnected and ports closed. Then you have to set the
TPS to .95 - .99 volts

If that's the only change you're doing, I think you'll find it's a waste of
effort.

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Yeh, I'm a Krusty old Geezer, putting up with my 'smartass' is the price
you pay..DEAL with it!

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lugnut - 02 Apr 2006 14:55 GMT

>> trying to upgrade to a 65mm throttlebody and having idle problems with
>> some back firing and rpm fluctuating any suggestions
[quoted text clipped - 10 lines]
>If that's the only change you're doing, I think you'll find it's a waste of
>effort.

I wish I had some of the money back I spent on such devices
when I was young, dumb and still capable of being horny
enough to think I needed it. Whadaya think?

Lugnut

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