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  #1  
Old 06-29-2019, 08:51 PM
redwoody redwoody is offline
232 I6
 
Join Date: May 16, 2010
Location: St louis
Posts: 96
vac leak

fresh 360. I have vac pump and cheked all vac lines. New EGR. Used full can of gum out around intake and base of carb. Checked line to vacuum booster. My transfer vacuum operates 4x4. adv vac holds. Just mild rv cam and my builder says I should be at 20 in vac. At cold start 13.5 warms to around 16 to 17 and fluctuates. 2150 carb has been cleaned and rebuilt. Im guessing internal carb leak? Thx
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88 GW hei E-fuel pump 360

Last edited by redwoody : 06-30-2019 at 08:30 PM.
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  #2  
Old 06-30-2019, 07:14 AM
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lkmarsh lkmarsh is offline
350 Buick
 
Join Date: Nov 21, 2008
Location: Modesto CA
Posts: 1,190
Did you disconnect vacuum line to brake booster and plug it?
Vacuum ball cracked? Stuck pcv? Vacuum lines under the dash?
Split rubber cap on an unused vacuum port?
You can check a brake booster with a vacuum pump but it takes forever.


Worst leak I ever dealt with was vacuum canister split a seam.
Took two weeks to find it.
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Seemed like a good idea at the time...
69 1414x Wagoneer 350/TH400 DD & Ski Ride
68 Chevelle wagon 350/BWT50
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  #3  
Old 06-30-2019, 02:03 PM
redwoody redwoody is offline
232 I6
 
Join Date: May 16, 2010
Location: St louis
Posts: 96
vacuum ball and under dash Thx. Did ck booster by removing line and plugging no change on vac guage
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88 GW hei E-fuel pump 360
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  #4  
Old 07-01-2019, 02:40 PM
PBG928 PBG928 is offline
232 I6
 
Join Date: Jul 29, 2016
Location: Palm Beach Gardens, FL
Posts: 61
Check two lines on passenger side of engine that vent fuel tank. Plug temporarily and see if performance improves.
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1986 Jeep Grand Wagoneer
1985 Jeep Grand Wagoneer
1978 Jeep CJ-5 (sold)
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  #5  
Old 07-01-2019, 04:29 PM
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Crankyolman Crankyolman is offline
258 I6
 
Join Date: Sep 27, 2017
Location: Pacific Northwest
Posts: 309
You say you are running a 2150, by chance could you have used a 2100 base gasket?




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Last edited by Crankyolman : 07-01-2019 at 04:35 PM.
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  #6  
Old 07-01-2019, 07:56 PM
redwoody redwoody is offline
232 I6
 
Join Date: May 16, 2010
Location: St louis
Posts: 96
my charcoal can is all plugged off. Vac lines have been removed. Theres no response using carb cleaner at base of carb. I just purchased the gskt under spacer for 2150. Pcv is clean and moves. Thx
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88 GW hei E-fuel pump 360

Last edited by redwoody : 07-01-2019 at 09:21 PM.
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  #7  
Old 07-02-2019, 09:04 AM
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babywag babywag is offline
out of order
 
Join Date: Jun 08, 2005
Location: Land of froot loops and cukcoo-nuts, CA
Posts: 9,372
My 90 has what I believe to be an rv cam installed.
It isn't a stocker but no idea what is installed.
It has never idled with higher than ~17" of vacuum.
A stock cam would do higher vacuum, 17 sounds normal to me.

If vacuum is fluctuating it could be AFR or ignition issues.
Or a mechanical issue
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'88 GW (aka Babywag) and '90 GW (aka JUNKbucket) both fuel injected
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  #8  
Old 08-08-2019, 04:54 PM
redwoody redwoody is offline
232 I6
 
Join Date: May 16, 2010
Location: St louis
Posts: 96
Took wag to builder. He replaced my pcv (was intermittent) w/ Dodge 360 set up. Don't need formed hose to base of carb. also my trap door in air cleaner(vac motor) was not opening fully. Hope this helps others. thx
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88 GW hei E-fuel pump 360

Last edited by redwoody : 08-10-2019 at 10:32 PM.
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