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Old 08-16-2011, 12:32 PM
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Timing / Idle

Ok, I got the ignition problem straightened out, and the new T5 transmission in the my 88 Mustang(302). I pulled it out the garage the day and took it around the block. Ran good, did'nt go too far because of those 4.56 gears in the rear that I'm trying to get rid of. My question is this. I had a buddy of mine set my timing. He has a local mechanic shop and runs two race cars on dirt tracks, so I kno he's pretty knowledgable. But it seems to me that the timing is set too high! It's a smooth idle, but it's just so high. Sounds like the car is revved too high. I'm not sure how to distinguish whether I can adjust the idle on the carb and correct the problem, but the distributor a little, or do I need to have the timing completely reset. I thought the timing should have been 10 BTDC, but I know he set it at something different. Any suggestions? He's a die hard Chevy, so maybe he set the timing thinking about a Chevrolet, I don't know. But I do know that the engines seems to be revving too high. The tach is not working, so I could'nt tell you want range it's idling at.

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Old 08-16-2011, 12:58 PM
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You don't set the idle by changing the initial timing! There is a screw, on the Carurator throttle linkage to adjust how low the idle is set. Usually it will have a spring to keep tension on it so that it doesn't unscrew itself from vibration.
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Old 08-16-2011, 01:04 PM
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Right, I understand that. I may have said it wrong. I guess my question should have been how can I tell if my timing is set with too much advance? I'm hoping it's just a matter of adjusting the idle. Thanks for the reply.
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Old 08-16-2011, 01:34 PM
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Sir, if you understand that you don't set the idle by changing the initial timing, you should understand that you don't change the timing by adjusting the idle! You have to adjust the idle speed screw to adjust the idle speed.
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Old 08-16-2011, 02:02 PM
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Get your buddy to look at it again.

Possible vac leak A hose fell off the carb

The timing curve is stuck part way up the curve
weights sticking, springs fell off
Springs too light sloppy inconsistant advance


In the mean time stay off the throttle
No WOT

Chevy Ford Chrysler is irrelevent.

Somethng has changed to casue the idle rpm to change.
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Old 08-16-2011, 02:53 PM
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Re

Thanks for all the responses. I'll call him over and have him take a look at it.
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