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Unread 07-02-2011, 08:35 PM   #1
MosesYJ
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1987 YJ Wrangler 
 
Join Date: Apr 2010
Location: bishopville, maryland
Posts: 239
Weber 38/38 problems/questions

ok so i installed a weber 38 onto my stock 4.2 today it starts up runs fine but i have ran into a couple of problems A). The FPR that i installed isnt showing any change in pressure on the gauge no matter how much i turn the nob, any ideas

B). also i have like maybe 2 inches of gas pedal travel and the pedal is really stiff, like REALLY STIFF has anyone else had these problems i looked but could not find the answer

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Unread 07-02-2011, 08:59 PM   #2
jstang
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1988 YJ Wrangler 
 
Join Date: Mar 2011
Location: southington, ct
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Ditch the regulator, use the stock bypass filter if using a mech. fuel pump. You either have binding linkage or your return spring(s) are too tight.
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Unread 07-02-2011, 09:14 PM   #3
monkeyhouse
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1997 ZJ 
 
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Location: Cumberland, Maryland, Maryland
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Quote:
Originally Posted by MosesYJ View Post
ok so i installed a weber 38 onto my stock 4.2 today it starts up runs fine but i have ran into a couple of problems A). The FPR that i installed isnt showing any change in pressure on the gauge no matter how much i turn the nob, any ideas

B). also i have like maybe 2 inches of gas pedal travel and the pedal is really stiff, like REALLY STIFF has anyone else had these problems i looked but could not find the answer
what brand of fpr are you using and what type of gauge? A gauge with fluid in it will work best. Assuming you are using the Holley FPR, right? As was mentioned, you don't really need it. I ran with the holley at first and had few issues, but ditched it and have never even noticed it. The OEM filter is an FPR. As long as you are using that and a mechanical pump(as previously mentioned) you won't have any issues.

Find a helper you use the pedal while you watch the linkage. I had some issues with my linkage at first. I had to install an extra spring and had to adjust some of my linkage, but it works good since. What part of the state is Bishopville in?
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First Jeep was an 1989 YJ, 6 cylinder 4.2L , 258. Nuttered and TeamRushed, Weber 38 DGES, Now, I'm venturing into the world of Grand Cherokees
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Unread 07-03-2011, 08:32 AM   #4
MosesYJ
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1987 YJ Wrangler 
 
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Location: bishopville, maryland
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thanks for the input guys my stupidity was the reason for the regulator not working i was trying to tighten and loosen the hex key without loosening the bolt under it, i am using a holley fpr with a mr gasket gauge btw, taking the gauge out and plugging it when i have everything worked out

still havent figured out the pedal but i guess ill just have to get used to it , jeep has a lot more power im very happy with the swap

bishopville is on the eastern shore 5 minutes from ocean city
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Unread 07-04-2011, 04:10 PM   #5
MosesYJ
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bump.... any more ideas on how to loosen the pedal up some or something its still incredibly stiff
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Unread 07-04-2011, 07:25 PM   #6
mcmud
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A picture of your linkage setup would be a great help.
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Unread 07-05-2011, 10:19 PM   #7
MosesYJ
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ok here is the linkage with the filter off sorry if pic is bad ill try to get another one up
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Unread 07-05-2011, 11:01 PM   #8
mcmud
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I see an engine bay with many of the parts that are found in one, a good portion of a fairly good size garage with a boat inside it... then over here we get an obscured view of a rod.
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Unread 07-05-2011, 11:42 PM   #9
monkeyhouse
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x2, you can get in there and grab some good pics.
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Unread 07-06-2011, 11:07 AM   #10
MosesYJ
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Location: bishopville, maryland
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thanks for the help guys but i called weber and they told me to mess with the lengths of the short rod on the linkage not the main rod i made it longer by about an inch and it increased the leverage on the whole linkage now the pedal is like stock ill upload a pic later because i cant explain it very well
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fuel pressure regulator , help please , weber carb
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