 Measuring fuel pressure, Help me troubleshoot my Carbs.... |
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| thomasotten |
 Nov 3 2007, 09:25 AM
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#1
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Senior Member  Group: Members Posts: 1,565 Joined: 16-November 03 From: San Antonio, Texas Member No.: 1,349  |
Dual Dellorto carb setup, the carbs tend to snap under load. After tinkering for a while with airflow and linkage and not resolving, I am going to go to basics and check fuel pressure. How do I measure this? Is there an inline guage I can buy?
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| thomasotten |
Nov 3 2007, 04:11 PM
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#2
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Senior Member Group: Members Posts: 1,565 Joined: 16-November 03 From: San Antonio, Texas Member No.: 1,349 |
Ok, I just finished adjusting the valves. Nothing was seriously out of adjustment.
Next, I went to Sears, and bought a cheap made-in-china fuel pressure guage. I'll be returning it, it's crap, but.... I am reading 3 to 3.25 psi before the carb Tee, in the engine bay. The guage is not that fine to read more precisely. It's a very new CB pump, by the way. So I measure my flow again, it looks the same. I drive it, same crap, snaps under acceleration (right carb), even bogs a bit. Then, at idle, i thought I heard a snap...reved it up a little more by hand...let it idle again....snap (right carb)!. So it's snaping occacionally even at no load at idle. |
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Posts in this topic
thomasotten Measuring fuel pressure Nov 3 2007, 09:25 AM
rhodyguy confirm valve adj and timing first thomas. what pr... Nov 3 2007, 10:20 AM
thomasotten
confirm valve adj and timing first thomas. what p... Nov 3 2007, 10:49 AM Bartlett 914
Dual Dellorto carb setup, the carbs tend to snap ... Nov 3 2007, 10:23 AM lotus_65 you have a return setup still, right?
you HAVE to ... Nov 3 2007, 12:55 PM McMark :agree: and you've got a quality pump, so get ... Nov 3 2007, 12:56 PM lotus_65 oh yea, and a gauge. mine's pretty lame compar... Nov 3 2007, 01:09 PM rhodyguy the cb pump he's running does not have a retur... Nov 3 2007, 01:32 PM Twystd1 Your lean going into the transition.
About where ... Nov 3 2007, 04:37 PM thomasotten
Your lean going into the transition.
About where... Nov 3 2007, 06:46 PM Aaron Cox only if you want them to squirt the same amount :)... Nov 3 2007, 06:55 PM thomasotten I'm on it... but, is there a general rule as t... Nov 3 2007, 07:07 PM McMark You can get a small vial that can be lowered down ... Nov 3 2007, 07:18 PM Twystd1 Try about 1/3rd from top of threads.
If no worky.... Nov 3 2007, 07:41 PM thomasotten
Try about 1/3rd from top of threads.
If no worky... Nov 4 2007, 03:03 PM ConeDodger Thomas,
My Dells had a pretty good vacuum leak at ... Nov 4 2007, 03:35 PM thomasotten I actually watched the accelerator squirt into eac... Nov 4 2007, 07:22 PM McMark Get ready to catch some fuel when you undo those f... Nov 4 2007, 11:02 PM type11969 All sorts of funky crap collects in those acc pump... Nov 5 2007, 08:37 AM thomasotten Well, I took the carbs off, and made sure the acce... Nov 9 2007, 04:19 PM type11969 Did you clean out the acc pump circuits?
Did you v... Nov 9 2007, 04:32 PM Thack Sounds like you are too lean. Are "idle... Nov 9 2007, 05:16 PM |
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