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Re: Vaccum gauge bouncing ... [Re: herkamer] #1679682
09/29/14 10:13 PM
09/29/14 10:13 PM
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Grand Prairie,Texas
stumpy Offline
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You still haven't told us what happened when you unplugged one wire at a time which will isolate a bad cylinder in case it isn't a carb problem. Just because all the parts are new doesn't mean one couldn't have failed.

Re: Vaccum gauge bouncing ... [Re: stumpy] #1679683
09/29/14 10:37 PM
09/29/14 10:37 PM
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Omaha Ne
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Quote:

You still haven't told us what happened when you unplugged one wire at a time which will isolate a bad cylinder in case it isn't a carb problem. Just because all the parts are new doesn't mean one couldn't have failed.





Re: Vaccum gauge bouncing ... [Re: TJP] #1679684
09/29/14 10:54 PM
09/29/14 10:54 PM
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ahy Offline
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I wonder if its possible you got ported vacuum? Sounds silly but wouldn't hurt to check another port... maybe same one as the brake booster.

Re: Vaccum gauge bouncing ... [Re: stumpy] #1679685
09/30/14 04:31 AM
09/30/14 04:31 AM
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JohnRR Offline OP
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Quote:

Just because all the parts are new doesn't mean one couldn't have failed.




No [Edited by Moparts - Family Friendly Site - Keep it clean]'

again , thanks for nothing

Re: Vaccum gauge bouncing ... [Re: ahy] #1679686
09/30/14 04:32 AM
09/30/14 04:32 AM
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JohnRR Offline OP
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Quote:

I wonder if its possible you got ported vacuum? Sounds silly but wouldn't hurt to check another port... maybe same one as the brake booster.




No , it's a holley carb , it was on the base.

Thanks to everyone that was helpful, it'll be a few weeks before I have the time to get back to it.

Re: Vaccum gauge bouncing ... [Re: JohnRR] #1679687
09/30/14 06:46 AM
09/30/14 06:46 AM
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Posts: 523
Right here
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An useful site for vacuum reading is http://www.secondchancegarage.com/public/186.cfm
If you are running a hot cam things changes. It's impossible to get a steady needle at lower rpm's, so how do you determine what power valve to put in your Holley?


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Re: Vaccum gauge bouncing ... [Re: HP2] #1679688
09/30/14 10:56 AM
09/30/14 10:56 AM
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Posts: 36,041
Lincoln Nebraska
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RapidRobert Offline
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Quote:

If you are running a hot cam things changes. It's impossible to get a steady needle at lower rpm's, so how do you determine what power valve to put in your Holley?


I would think a person would use the lowest (number) of PV available. Cuz you'd wanna stay out of the power circuit until you nail it. OT At WOT if the in hg is at or more than (1) in hg then the carb selection is too small. & either way (CFM) you'd still need a low number to stay out of "power" until you floor it. Back to the problem at hand, Double R we'll be waitin & for your sake it hope I'm wrong about it being a HG


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Re: Vaccum gauge bouncing ... [Re: HP2] #1679689
09/30/14 12:05 PM
09/30/14 12:05 PM
Joined: May 2003
Posts: 15,487
Florida
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Quote:

An useful site for vacuum reading is http://www.secondchancegarage.com/public/186.cfm
If you are running a hot cam things changes. It's impossible to get a steady needle at lower rpm's, so how do you determine what power valve to put in your Holley?




thanks, that was indeed an interesting read on the vac readings.

Re: Vaccum gauge bouncing ... [Re: JohnRR] #1679690
09/30/14 02:03 PM
09/30/14 02:03 PM
Joined: Jan 2003
Posts: 32,971
Grand Prairie,Texas
stumpy Offline
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Quote:

Quote:

Just because all the parts are new doesn't mean one couldn't have failed.




No [Edited by Moparts - Family Friendly Site - Keep it clean]'

again , thanks for nothing




What is your problem?. I have done nothing but try to suggest things to help and you come back with garbage aimed at me. If my advice bugs you so much then put me on ignore.

Re: Vaccum gauge bouncing ... [Re: HP2] #1679691
09/30/14 04:19 PM
09/30/14 04:19 PM
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JohnRR Offline OP
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Quote:

An useful site for vacuum reading is http://www.secondchancegarage.com/public/186.cfm
If you are running a hot cam things changes. It's impossible to get a steady needle at lower rpm's, so how do you determine what power valve to put in your Holley?




Thanks I'll check it out.

As I was trying to fall asleep I remembered something that happened while turning the engine over to inspect the cam while the intake was off , it's either a head gasket or a bent intake valve.

Re: Vaccum gauge bouncing ... [Re: JohnRR] #1679692
09/30/14 05:06 PM
09/30/14 05:06 PM
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Posts: 6,224
JERSEY
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Quote:

Quote:

An useful site for vacuum reading is http://www.secondchancegarage.com/public/186.cfm
If you are running a hot cam things changes. It's impossible to get a steady needle at lower rpm's, so how do you determine what power valve to put in your Holley?




Thanks I'll check it out.

As I was trying to fall asleep I remembered something that happened while turning the engine over to inspect the cam while the intake was off , it's either a head gasket or a bent intake valve.




I was poking you with a stick just for fun, You know your still the coolest right???
Ron

Re: Vaccum gauge bouncing ... [Re: RJS] #1679693
09/30/14 07:03 PM
09/30/14 07:03 PM
Joined: Jan 2003
Posts: 75,082
U.S.S.A.
JohnRR Offline OP
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Quote:



I was poking you with a stick just for fun, You know your still the coolest right???
Ron




I'm far from the coolest ...

Re: Vaccum gauge bouncing ... [Re: JohnRR] #1679694
09/30/14 09:46 PM
09/30/14 09:46 PM
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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RapidRobert Offline
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Quote:

I've got a good idea as to what it may be , the problem is in order to change out the offending part to prove that it is bad I'm the one that will have to supply the parts


Double R what are you thinking it is?


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Re: Vaccum gauge bouncing ... [Re: RapidRobert] #1679695
10/16/14 06:15 PM
10/16/14 06:15 PM
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JohnRR Offline OP
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Not that it matters but the spark plug wire test pointed to cylinder #5 according to my friend when he did it but compression check was ok on 3, 5 and 7 ....

Funny part was the broken valve spring was the exh. on cylinder #1


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