| Re: [GMCnet] Vapor Lock Question [message #128933] |
Mon, 06 June 2011 15:02  |
Richard Brown
Messages: 281
Registered: May 2009
Karma: 1
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Senior Member |
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Another thing to consider is what happened to me when I owned a 75 Chevy PU with HEI. It was doing the same thing. I thought it may have been vapor lock, but it turned out that the PO had installed a new module in the distributor without putting heat grease under it. Eventually it failed completely.I learned that when replacing the module be sure to spray some carb cleaner on a rag & clean the mounting surfaces thoroughly,including the bottom of the module, then put heat grease on the module & install
Richard & Carol Brown
1974 Eleganza SE
"DILLIGAF"
Lindale, Tx. 75771
903-881-0192
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Richard & Carol Brown
1974 Eleganza SE
1174 Hickory Hills Dr.
Murchison, TX. 75778
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| Re: [GMCnet] Vapor Lock Question [message #128936 is a reply to message #128933] |
Mon, 06 June 2011 15:28  |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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Senior Member |
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Next time you have a similar problem, check to make sure that you have
spark. HEI modules are known to give a similar warning before they go toes
up. Pull the air cleaner top and look at the carb and verify that you have
fuel, and that it is not boiling merrily away in your carb. If that is the
situation, pull the intake manifold and block the exhaust crossover if you
haven't already done so. An electric fuel pump in line with a bypass routed
around it with a check valve will help also. This crappy gas is not going
away anytime soon. It is up to us to become creative and look for solutions
that actually work 100 percent of the time, if we want to enjoy our GMCs in
the future.
Jim Hupy
Salem, Or
78 GMC Royale 403
On Mon, Jun 6, 2011 at 1:02 PM, Richard Brown
<wings77sporty@sbcglobal.net>wrote:
> Another thing to consider is what happened to me when I owned a 75 Chevy PU
> with HEI. It was doing the same thing. I thought it may have been vapor
> lock, but it turned out that the PO had installed a new module in the
> distributor without putting heat grease under it. Eventually it failed
> completely.I learned that when replacing the module be sure to spray some
> carb cleaner on a rag & clean the mounting surfaces thoroughly,including the
> bottom of the module, then put heat grease on the module & install
>
> Richard & Carol Brown
>
> 1974 Eleganza SE
>
> "DILLIGAF"
>
> Lindale, Tx. 75771
>
> 903-881-0192
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
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| Re: [GMCnet] Vapor Lock Question [message #129038 is a reply to message #128933] |
Tue, 07 June 2011 02:59 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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Senior Member |
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| Richard Brown wrote on Mon, 06 June 2011 15:02 |
Another thing to consider is what happened to me when I owned a 75 Chevy PU with HEI. It was doing the same thing. I thought it may have been vapor lock, but it turned out that the PO had installed a new module in the distributor without putting heat grease under it. Eventually it failed completely.I learned that when replacing the module be sure to spray some carb cleaner on a rag & clean the mounting surfaces thoroughly,including the bottom of the module, then put heat grease on the module & install
Richard & Carol Brown
1974 Eleganza SE
"DILLIGAF"
Lindale, Tx. 75771
903-881-0192
|
I have also seen coils do the same thing. Fail hot and run cold or cooler.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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