Re: question about engine losing power
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Remove distributor cap. Just disconnect the tube going to vac advance, stick your mouth on it and suck on it. WATCH WITH TWO EYES to see if the points plate moves or not.
Posted on: 2017/6/14 18:13
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VAPOR LOCK demystified: See paragraph SEVEN of PMCC documentaion as listed in post #11 of the following thread:f
https://packardinfo.com/xoops/html/modules/newbb/viewtopic.php?topic_id=7245 |
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Re: question about engine losing power
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If you're not comfortable with pulling the carb, take it to whomever rebuilt it. It's probably just got a little or alot dirt in it, a float issue, etc.
You didn't say if the fuel system was cleaned, so I suspect some type of fouling coming from it that prevents adequate fuel when required for the rpm. Fuel pump could be failing, but probably OK and you'll know when it goes completely. Pre-electronic electrical systems usually aren't as selective to not run in a speed range. You have good spark/no starting issues, and power returns after fuel has not been called for. You can monitor the exhaust gas ratio to check for starving, but need equipment. So probably best to take to a mechanic/auto shop.
Posted on: 2017/6/14 21:11
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Re: question about engine losing power
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The problem could be something as simple as a plugged fuel filter. JWL
Posted on: 2017/6/14 21:16
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And make happen What occupies our mind... (W. Scherer) |
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Re: question about engine losing power
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If the electric fuel pump is the vane type, and you have it shut off during running, very little gas will be allowed to pump through it.
Posted on: 2017/6/15 9:30
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Re: question about engine losing power
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With no diagnostics done or reported, we're just throwing a handful of corn at the barn door. But if the problem is within the distributor it's far more likely to be the centrifugal advance and not the vacuum advance. And failures of the mechanical advance are very uncommon. Put your timing light on and just rev the engine from an idle up to some higher speed - if the timing changes I think you can look elsewhere for the problem. My inclination is that it's fuel related so the next diagnostic I'd do is fuel pump delivery (volume and pressure) and of course check any rubber sections of the fuel line, especially those on the suction side.
But before that, check the fuel filters as others have already suggested and don't forget that many mechanical pumps have a fine mesh brass screen above the fuel bowl, and likewise many carburetors have their needle and seat protected by a similar mesh screen at the fuel inlet.
Posted on: 2017/6/15 11:05
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Re: question about engine losing power
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Get a good service manual with a diagnostic section applicable to all cars, a Packard is not different. I could list 50 or 75 things to cause this problem and you may go broke trying to figure it out, I use books and brains, suggest you do the same.
Posted on: 2017/6/15 11:38
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Re: question about engine losing power
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Do not forget many electric fuel pumps also have a filter -I experienced that problem
Posted on: 2017/6/15 14:04
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Re: question about engine losing power
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Another thing to check is mentioned here in this blog in #42.
Posted on: 2017/6/16 18:29
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