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post #1 of (permalink) Old 10-28-1999, 05:13 PM
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low intake vacuume reading

My 77 dodge powerwagon has a 360 with a holly 2bbl carb. When I hook up a vacuume guage it only reads about 14 to 15 hg. Why could this be? I replaced the intake gaskets and rebuilt the carb but it's the same.
On my trailduster with a 4bbl it reads over 18.

Any Ideas or is this just how the 2bbls are set up?

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post #2 of (permalink) Old 10-29-1999, 01:12 AM
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Re: low intake vacuume reading

My '73 W100 with 360 4BBL is about the same.


cLAY

cLAY
post #3 of (permalink) Old 10-31-1999, 08:40 PM
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Re: low intake vacuume reading

Check your egr valve, take it off and clean it. I have a 79 318 w/ 4bbl and it fixed it.
kevin

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post #4 of (permalink) Old 11-01-1999, 12:03 AM
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Re: low intake vacuume reading

Mine does not have a EGR valve.


cLAY

cLAY
post #5 of (permalink) Old 11-01-1999, 12:03 AM
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Re: low intake vacuume reading

are you using a stock cam? how much compression do you have.what gas are you useing? what ing. timing?
give me a call with this and I'll give you your answer...///GT,301-933-5277


post #6 of (permalink) Old 11-01-1999, 02:33 PM
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Re: low intake vacuume reading

ON MY 78 360 (RECENTLY REBUILT)I HAVE 16 HG WITH A 4BBL.

post #7 of (permalink) Old 11-05-1999, 08:41 PM
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Re: low intake vacuume reading

Thanks for the help.
I haven't done anything to it other that putting a Holley 4bbl carb and manifold but I had to reinstall the 2bbl to pass Calif. smog check. I wonder if the cam is stock. This thing has more torqe and grunt that stock and it had headers and dual glass pack exaust and a bunch of other goodies. I set the timing at TDC as specified on the sticker and reinstalled stock exaust maifolds (smog check stuff).
As for EGR, when I had the 4bbl the intake had no EGR and the readings were the same.
But I bought it three years ago and was modified as I stated above by the previouse owner so I know if I were to have done all those mods it WOULD have included a new cam.
I can be contacted at [email protected]




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