Re: [MV] Vaccum test results ... re M151 mystery miss

From: m35products (m35prod@optonline.net)
Date: Sat Feb 05 2005 - 11:28:05 PST


Last I knew, my friends at Saturn Surplus were in Pennsylvania, not
California.

apb

----- Original Message -----
From: "Mil-Veh Co." <milveh@sbcglobal.net>
To: "Military Vehicles Mailing List" <mil-veh@mil-veh.org>
Sent: Saturday, February 05, 2005 2:24 PM
Subject: Re: [MV] Vaccum test results ... re M151 mystery miss

> (drum roll) Here is the vaccum test results!
>
> (done with two vaccum guages just to be sure and I got
> the same results on both so this is right)
>
> V. gauge needle rides in red (meaning late ign timing)
> @ 450-500 rpms and only goes to green on a fast idle
> of about 850-900 rpms. Needle flicker is about 1/8 to
> 3/16th inch on the dial. Aha, needle flicker...thats
> a clue!
>
> Total vaccum draw runs about 15-16 inches, normal
> should be around 20-22, right? Sooooo, guess what I
> am going to have to do...uh, anybody got an intake
> gasket for sale? lol (actually I been buying from
> Saturn Surplus, they are about the best retail prices
> I could find and they are in California, close)
>
> Oh, almost forgot to tell you this part.... I
> re-checked to see how the engine ran with the choke on
> and yes, it appears it does run slightly better,
> although its hard to tell on a cold engine as I only
> ran it for about 2 minutes. But, I'll take this as
> another clue for a vaccum leak...got to be in the
> manifold right over number 2 or less likely I have to
> say it still could be an obstruction. But, at least I
> am getting it narrowed down now.
>
> You wouldn't think a minor vaccum leak would make that
> much difference to how it fires would you? That is IF
> thats what it is and I think it is now. Also I've
> seen a lot worse flicker on v gauges on engines that
> ran better, but I guess symptoms act exaggerated on
> little 4 bangers.
>
> Q. Is there an interchange for the intake gasket to a
> civilian type? Something I might find at a local auto
> parts store. I think a Ford industrial engine seems
> real similar to a Mutt engine, anybody know for sure?
>
>
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