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1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks Discuss the Early Eighties Bullnose Ford Truck

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  #16  
Old 03-08-2012, 11:51 PM
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Quote:
Originally Posted by kedwinh View Post
If your talking about a timing lite for the 300 why not use a vacuum gauge? That's all I use anymore and it works great. Apparently my harmonic balancer has slipped, which I have read is a common problem with the 300, and that was my only option. It's a lot easier than the light is I think. Just hook it up, set timing to maximum vacuum then back it off 2-3 points.
Yes, good point kedwinh. A vacuum gauge is probably more useful than a timing light. I guess I just recomended that because I'm more familiar with using a timing light to check timing than using a vacuum gauge. But agreed, vacuum gauge is probably even better in case the timing marks can't be trusted.

The (only) advantage of a timing light approach is this: using a vac gauge requires adjustment of timing, since you have to adjust to know if you are pulling maximum vacuum or not. With a timing light, if you have faith in the timing marks, you can check timing and know without adjusting anything if you are close or not to correct timing advance. I could be wrong, though.
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  #17  
Old 03-09-2012, 10:28 PM
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Probably a stupid question but am a ask . How much does warm up affect mpgs? Not shore about how mpgs are influenced but I let ol blue warm up for a long time at least 15-20 minutes . Hit the throttle one time to disengage the choke an ol girl purred like a kitten she ran sooooo smoothly.
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  #18  
Old 03-09-2012, 10:36 PM
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A warmed up engine likely does get better mpg compared to when its cold!
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  #19  
Old 03-09-2012, 11:16 PM
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I've let mine warm up 10 or more minutes in below-zero temperatures.

But, I'm getting 0 MPG while doing that, so I try to take off as soon as it's warm enough to operate decently.
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  #20  
Old 03-10-2012, 01:39 AM
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We don't often have really cold weather here but, even when it does get below freezing, I never let it idle more than about 1 minute. Just long enough that it idles good on it's own. But then again I have my chock backed almost all the way off.
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  #21  
Old 03-10-2012, 07:58 PM
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So today didn't do much but got the lookin around on my truck an I realize my truck doesn't have a kickdown cable. That connects the carb and c6 transmission. Would that have an adverse affect on my mpgs? I always felt my truck shifts layed back and lax and late . I was goin to look into that . Goin to borrow a timing light to check that out. An the Duraspark conversion is soon to come soon as I get come cash .
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  #22  
Old 03-10-2012, 08:26 PM
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The kickdown cable will only affect WOT downshifts, if your system is in limp mode the timing is locked at whatever it is set at static, probably 10 BTDC.
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  #23  
Old 03-13-2012, 08:38 AM
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the past few days my truck has been running rather good. good power great idle still poor mpg. all i really did was continue playing with the air idle mixture screw, replaced the fuel filter and added some fuel treatment. i also have really been letting the truck warm up properly ( i think that was one reason for the irratic idle) so my bad for that. i have really been ***** footing the truck never driving above 35mph. and i calculated my milage and i am still getting 10.31mpg. i have yet to check timing. i have been soo busy these past days. anymore suggestions i will be glad to take. thanks guys.
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Old 03-13-2012, 08:38 AM
 
 
 
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