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Old 07-28-2008, 01:02 PM
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Azrael Azrael is offline
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Default Engine diagnosis help in Denver? (FJ40)

Hey folks! Isotel recommended I come over here from IH8MUD and see if you could help me out. I'm having engine troubles that sound like they may be a fuel delivery issue ('72 FJ40 with a 2F engine and unknown Weber carb). I've changed the filter and cleaned the tank out, though the tank seemed pretty clean to start. Before I spend the money to replace the pump, I was wondering if anyone who knows more than I do (not hard) could come by and verify that it is in fact the problem. I can't offer much in return, other than a six pack of your favorite beer, and a pat on the back, but it would be highly appreciated.

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Jeff
jmchebul@jmchebul.com (best way to get a hold of me)
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Old 07-29-2008, 11:07 AM
trucruiser trucruiser is offline
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Have you checked to see if you are getting fuel to the carb?
Pull the fuel line hooked to the carb crank the engine and see if fuel spits out.
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Old 07-29-2008, 11:14 AM
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Have you tried adjusting the carb, verifying vacuum and doing the timing?
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Old 07-29-2008, 11:47 AM
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Quote:
Originally Posted by trucruiser View Post
Have you checked to see if you are getting fuel to the carb?
Pull the fuel line hooked to the carb crank the engine and see if fuel spits out.
Pretty sure it's not the pump now. I'm definitely getting fuel, but I was thinking it wasn't enough. Hooked up an inline pressure gauge this morning, and am getting a constant 2.5-3 psi. From what I've read, that should be about right.

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Have you tried adjusting the carb, verifying vacuum and doing the timing?
I'm still rather new to working on engines. This is all over my head. How do I go about any of these?
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Old 07-29-2008, 11:51 AM
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Quote:
Originally Posted by Azrael View Post
I'm still rather new to working on engines. This is all over my head. How do I go about any of these?
http://forum.ih8mud.com/40-55-series...rks-great.html
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Old 07-29-2008, 12:09 PM
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Alright, so I don't think there's a vacuum link. Unfortunately, I don't have the multimeter/tach they mention to adjust the carb. I'm also a little fuzzy on what the rest of that means exactly. I work better with pictures and crayon drawings than I do with technical jargon. So, as I mentioned before, if anyone has the tools/knowledge, and is willing to stop by and help sometime, I'll pay in beer!
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Old 07-29-2008, 12:14 PM
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You can buy a multimeter and tach at any parts store. I did this on a 77 FJ40 with a 2F, so it might be different
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Old 07-29-2008, 12:20 PM
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I think you missed the point that I'm a bit of a cheap ass. If I can find someone willing to work for a six pack of beer, it's cheaper than buying the tools.
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Old 07-29-2008, 12:21 PM
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Describe more your "engine troubles." Does it not start at all? Or not idle? Or not run well? What kind of troubles are we talking about, that will help steer you towards fuel delivery, or carb, or plugs/coil/wires/dist, etc.
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Old 07-29-2008, 12:28 PM
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Starts OK, and idles pretty much fine, though it'll be better when the carb is adjusted, I'm sure. It's when I'm accelerating that the engine starts to cut out and threatens to stall. If I can make it to a reasonable cruising speed, it smooths out again, and runs fine, though I'll still get an occasional sputter. That's what led me to think it was fuel delivery. Felt like I just wasn't getting enough gas when I was hitting the throttle.
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