MoparFins

Techical Discussions => Tech- - Engine => Topic started by: Jason Goldsack on April 03, 2011, 05:08:07 AM

Title: Vacuum
Post by: Jason Goldsack on April 03, 2011, 05:08:07 AM
OK.. I have had a problem with one plug fouling because of a leaky intake..

Well the weather was nice and I wanted to get it fixed before I had my hernia surgery this Tuesday since I won't be able to lift of lean over the Windsor to fix it for about 4 weeks..

I pulled the intake, pulled the valley pan.. cleaned everything ( noticed the heat crossover was leaking under the valley pan).. and reinstalled everything.

This time I used a thick paper gasket ( about a 1/4 inch) under the carb to keep the holley cooler than just using the thin paper gasket.

Before the fix I had 16 in vaccum at idle now I have 14... I adjusted the idle circuit  to the highest vacuum reading..

WTH? It can't be leaking I cleaned every surface and it looked like new when I installed it...!!!

I put gasket sealer on the paper gasket before I installed the carb to minimize the chance of a  leak...

The car runs much better... it doesn't smell like exhaust under the hood ( which would have been the leaky crossover). Before the fix it would pop once and a while ( I assume oil leaking in one of the cylinders).. now it's smooth sailing..

Should I worry about it that the vacuum reading is less?


Title: Vacuum
Post by: Steve on April 03, 2011, 06:21:24 AM
Re-torque the intake.
 
POLARACO2011-04-03 11:22:22
Title: Vacuum
Post by: Jason Goldsack on April 03, 2011, 07:01:49 AM
Aluminum M-1 Dual Plane...

Title: Vacuum
Post by: Steve on April 03, 2011, 10:08:28 AM
MMMMM
 
Try a thin coat of RTV on the valley pan
Title: Vacuum
Post by: Jason Goldsack on April 03, 2011, 10:18:41 AM
I did...

Title: Vacuum
Post by: Steve on April 03, 2011, 04:04:31 PM
Crack maybe?  I don't mean the kind you smoke.  LOL
Title: Vacuum
Post by: Jason Goldsack on April 03, 2011, 05:25:18 PM
Well it seemed to get better when I drove today. I normally get 16 in at 55 mph cruising and it was at that today.. still a little low at idle ( 14 in instead of 16 in)

Title: Vacuum
Post by: Steve on April 03, 2011, 08:11:08 PM
I know this is a dumb question. . .  Is the vacuum line going to the heater controls in good shape?  How about the brake booster hose?
 
Not too many places it can leak
Title: Vacuum
Post by: Jason Goldsack on April 04, 2011, 02:44:43 AM
I thought about that.. the heater vacuum hose is REALLY hard. I had to soften it with heat to get it to go back on. The power brake booster line seems good..

Where can you get a new "tree" or whatever it is called that hooks the vacuum lines to the intake?


Title: Vacuum
Post by: Leaburn Patey on April 04, 2011, 03:29:37 PM
[/QUOTE]
How many "tees" does yours have??
PM me.
 
Title: Vacuum
Post by: Jason Goldsack on April 04, 2011, 05:51:54 PM
It just has the main one and one little tees coming off..



Title: Vacuum
Post by: Leaburn Patey on April 04, 2011, 06:13:03 PM
Lemme take a look in my Mopar tickle trunk.................
Title: Vacuum
Post by: Jason Goldsack on April 05, 2011, 03:41:08 AM
LOL... I think only a Canadian will understand that one.. LOL

(http://2.bp.blogspot.com/_KuaAihD4oVk/SVwzTUfGLQI/AAAAAAAAG3s/-uwtX8AmRU4/s400/tickle-trunk-closed.jpg)


Title: Vacuum
Post by: Michael Bond on April 07, 2011, 04:50:35 PM
You might look at your timing.  If it is late, (I think that direction), the vacuum will be low.  Could explain why it is running better, but carrying less vacuum.

Title: Vacuum
Post by: Steve on April 07, 2011, 05:29:54 PM
I don't think he moved they disty.  But knowing Jason, he probably made a pizza on it.  LOL
Title: Vacuum
Post by: Michael Bond on April 07, 2011, 05:40:32 PM
He may not have had to.  It may have been running pretty crazy with what he had going on....

Title: Vacuum
Post by: Jason Goldsack on April 08, 2011, 02:51:00 AM
LOL.. didn't touch the dizzy.. but it's funny you mentioned that. My stepfather said exactly the same thing. He said I should check the timing..

Anyone explain how sealing up an intake could effect the timing?

Dizzy cooked pizza... mmmmmmm LOL


Title: Vacuum
Post by: Michael Bond on April 08, 2011, 03:16:02 AM
The lack of vacuum could affect fuel flow into the chambers, as well as increase the amount of air that enters with the fuel....  Requiring the timing to be off in order for the car to run smoothly.  Fix the leak, and now the timing could be off....