New weber install and fuel pressure regulator -

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post #1 of 7 Old 04-27-2013, 09:34 AM Thread Starter
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1983 CJ7 
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New weber install and fuel pressure regulator

I just put a weber on my 258 and I'm trying to figure out the best way to route the fuel lines with the regulator. Anyone have any pics of their set up??
Also I spoke with Holley about their regulator and they say to just get rid of the regulator and run one line to the carb.., I've also heard other people say that you don't need a regulator and you can just run a return line with a fuel filter and it'll act as a regulator for the weber... Any thoughts? And I should put the a fuel filter before the regulator right?

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post #2 of 7 Old 04-27-2013, 09:39 AM
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No regulator needed with the right filter.


Live in a way that those who know you but don't know God will come to know God because they know you.
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post #3 of 7 Old 05-24-2013, 03:22 PM Thread Starter
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I installed my weber, hooked up all my vacuum lines (distributor and brake booster because everything else was ripped out when I bought it) and found some preliminary tuning guidelines which I followed and I've got it idling and responsive but it idles like there's a miss just a little rough. I haven't changed wires, plugs or rotor yet but I read somewhere that you should just advance the ignition and then tune from there? Any other thoughts? -oh and I am running just a fuel filter with a single inlet, outlet and return if that makes a difference.... I have a Holley regulator and gauge that I will probably Install to see If that helps.
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post #4 of 7 Old 05-24-2013, 09:04 PM
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I installed a weber on my jeep years ago, runs much better.

I run the fuel filter (one in - 2 out), outside out goes to return fuel tank and must be installed at 12:00 high

if the out - outside outlet is located in any position other than 12:00 high, it can allow the system to syphon all the gas out of the carb after sitting for a long period of time, say overnight.

then be hard to start the next morning until the pump refills the carb with fuel
works fine for my set up

I had to advance the timing to get it to run good,
have not touched it in years.

I only run non ethanol gas in the old jeep, do not know if that makes a difference.

do a full tune up and be sure everything is in top condition.
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post #5 of 7 Old 05-25-2013, 11:40 AM Thread Starter
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Funny you mention that, I found that out this week. I put that filter at 6:00 and it was hard starting. I started with two turns out on the weber Mixture and idle screw and it runs good except for that little miss or rough idle. It kind of bugs me but I'll definitely do a tune up and advance the timing a little.

Another thing I noticed is that the brake booster sounds like it is leaking under the dash. It seems to work fine because If I unhook the vacuum to it the brakes are really hard. I don't remember my other cj's sounding like there's a vacuum leak under the dash. So, with that being said, if the booster is bad can this leak effect how the jeep runs?
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post #6 of 7 Old 05-28-2013, 06:52 AM Thread Starter
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Update: I installed the fuel regulator and set to 3.5 psi. Actually runs a lot better although the booster is still leaking. The other thing I can't figure out is when you hit the gas it is responsive but the idle hangs for a second and comes down slow. Anyone know why this would happen? Still haven't done the time up yet or advanced the timing...
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post #7 of 7 Old 05-28-2013, 07:16 AM
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Been working on this thread, it might be helpful

Tune up on a 285 / Weber Carburetor / Distributor / Timing / Advance / Discussion

Glenn R. Lever
Rochester, New York 14617-2012
My Web Site

My restoration thread here on the Jeep forum
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