Hard Starting Problem
10-04-2010 | 10:44 PM
#11
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Joined: Aug 2005
Posts: 6,306
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From: Between A Womans Leggs in IL
Fixx
The fuel pressure varies between 4-7 psi so I think that is good. Floats I need to re-check. The pumping of the throttle makes sense and was never described that way to me before. I know the erratic idle is normal and a case of too rich usually. My idle screws are all at 1/2 turn. I am going to redo my timing when I put my new bushing in that is only a 14 deg adv.
Wouldn't an idle of 1000 at first then calm down to its normal surge be an idicator of a vacuum leak? Just trying to figure out all the different idle rpms I am dealing with.
Wouldn't an idle of 1000 at first then calm down to its normal surge be an idicator of a vacuum leak? Just trying to figure out all the different idle rpms I am dealing with.
10-05-2010 | 07:28 PM
#12
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Joined: May 2010
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because of the blower surge you want to check fuel pressure @ a slightly higher rpm,rev it to 1200 rpm's and check it..you want a minimum of 7 psi. the surge is normal.. read this article about adjusting your carb's http://www.candsspecialties.com/tuning1.html
Thanks for the help guys!
10-06-2010 | 12:45 AM
#13
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Joined: Aug 2005
Posts: 6,306
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From: Between A Womans Leggs in IL
Fixx
checking on water is my next todo.
I thought 7 psi was max? For some reason my varies even when cruising. Im ok with the surge part, just trying to get a good idle all the time with easy hot starts. I have seen that tuning site, what a pain on a holley though. I would have to remove the carb to adjust the sec. Why do others say not to do this? I guess if I take them off and adjust them a 1/4 turn I should be fine from there since it is at 1/2 now and the pri at 1 turn.
Thanks for the help guys!
I thought 7 psi was max? For some reason my varies even when cruising. Im ok with the surge part, just trying to get a good idle all the time with easy hot starts. I have seen that tuning site, what a pain on a holley though. I would have to remove the carb to adjust the sec. Why do others say not to do this? I guess if I take them off and adjust them a 1/4 turn I should be fine from there since it is at 1/2 now and the pri at 1 turn.
Thanks for the help guys!
10-06-2010 | 07:41 AM
#14
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Joined: Jul 2004
Posts: 11,332
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From: chicago
Have you tried blowing the idle air bleeds out on the tops of the carbs? Remove the flame arrestors, and stick the little red tube from the can of carb clean in them and give them a blast. They can get plugged up real easy, especially if your valve cover vents are plumbed to the flame arrestor. The blowby residue gets in them and plugs them up. Give it a try.
10-06-2010 | 08:30 AM
#15
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Joined: Nov 2001
Posts: 3,393
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From: IBX
checking on water is my next todo.
I thought 7 psi was max? For some reason my varies even when cruising. Im ok with the surge part, just trying to get a good idle all the time with easy hot starts. I have seen that tuning site, what a pain on a holley though. I would have to remove the carb to adjust the sec. Why do others say not to do this? I guess if I take them off and adjust them a 1/4 turn I should be fine from there since it is at 1/2 now and the pri at 1 turn.
Thanks for the help guys!
I thought 7 psi was max? For some reason my varies even when cruising. Im ok with the surge part, just trying to get a good idle all the time with easy hot starts. I have seen that tuning site, what a pain on a holley though. I would have to remove the carb to adjust the sec. Why do others say not to do this? I guess if I take them off and adjust them a 1/4 turn I should be fine from there since it is at 1/2 now and the pri at 1 turn.
Thanks for the help guys!
Good advice from mild thunder there too.......
