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 Re: Sorry to post
[Re: rxinhed]
#944627
05/11/09 10:52 PM
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Joined: Mar 2008
Posts: 59
OP
Getting the Wheeling Fever
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I own one, I just don't know what each line is suppost to be at.... Before I dive into testing that, does anyone know how to reset the ECU?
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Re: Sorry to post
[Re: From_jeep_to_raider]
#944628
05/14/09 12:11 AM
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Joined: Mar 2008
Posts: 59
OP
Getting the Wheeling Fever
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Still need to know how to reset the ECU. I am also curious where the location of the sub/secondary EGR is?
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Re: Mikuni secondary vacuum line question.
[Re: From_jeep_to_raider]
#944629
05/14/09 04:13 AM
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Joined: May 2000
Posts: 6,132
Trail Leader
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I'm sure at some point this subject has been covered, but I am unable to locate anything on it. Which line do you apply vaccume to, to check the secondary carb? Also, could this be causeing choking at higher RPM's with air filter housing on? It does not choke at high RPM's when the air filter housing in off.....I'm about ready to burn this car alive! With all the time and money I have in it, it should be gold plated. lol You have a stuck bowl vent... Since its stuck open the fuel on the bowl is always referenced to atmospheric pressure. When you put an air filter on you get a pressure drop at the cars inlet. The fuel bowl is supposed to be referenced to the inside of the air filter. Since your bowl vent leaks.... Your have more pressure above the fuel than you should. That causes the motor to run really, really rich. As a test block off the bowlÆs vent line to the carb (large line that goes across the valve cover). It should run a lot better with the air filter on. Kevin
87 Turbo Intercooled Raider, roller cam, torsen rear diff, LSD front diff, lockup auto with modified converter, V6 brakes, low transfer case gears...
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Re: Mikuni secondary vacuum line question.
[Re: Kevin C]
#944630
05/14/09 03:55 PM
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Joined: Dec 2001
Posts: 11,727
Web Wheeler
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I'm sure at some point this subject has been covered, but I am unable to locate anything on it. Which line do you apply vaccume to, to check the secondary carb? Also, could this be causeing choking at higher RPM's with air filter housing on? It does not choke at high RPM's when the air filter housing in off.....I'm about ready to burn this car alive! With all the time and money I have in it, it should be gold plated. lol You have a stuck bowl vent... Since its stuck open the fuel on the bowl is always referenced to atmospheric pressure. When you put an air filter on you get a pressure drop at the cars inlet. The fuel bowl is supposed to be referenced to the inside of the air filter. Since your bowl vent leaks.... Your have more pressure above the fuel than you should. That causes the motor to run really, really rich. As a test block off the bowlÆs vent line to the carb (large line that goes across the valve cover). It should run a lot better with the air filter on. Kevin That's exactly what you told me in 2001 in Death Valley...my memory must be going. <img src="/forums/images/graemlins/zombie.gif" alt="" />
98 Montero with cold weather package
96 Toyota Land Cruiser, fully locked Mall Machine :-)
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Re: Mikuni secondary vacuum line question.
[Re: LRJ4x4]
#944631
05/14/09 04:05 PM
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Joined: Mar 2008
Posts: 59
OP
Getting the Wheeling Fever
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Hi Kevin,
Thank you very much for the advice. If this is the case, how do I fix it?
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Re: Mikuni secondary vacuum line question.
[Re: From_jeep_to_raider]
#944632
05/14/09 06:06 PM
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Joined: May 2000
Posts: 6,132
Trail Leader
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You need the carb bowl vented when the motor is off and possibly at idle. Its been a long time... Fuzzy on the details.
A carb rebuild is probably the best option. You can just plug the bowl vent but hot starting will be a problem since the gas evaporating out of the bown wont have a place to go other than into the intake...
Or you could get creative and rig up an external vent valve the is controlled by the ignition. Cloces when its running open when its off.
Kevin
87 Turbo Intercooled Raider, roller cam, torsen rear diff, LSD front diff, lockup auto with modified converter, V6 brakes, low transfer case gears...
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Re: Mikuni secondary vacuum line question.
[Re: Kevin C]
#944633
05/15/09 03:42 AM
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Joined: Mar 2008
Posts: 59
OP
Getting the Wheeling Fever
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Haha, Kevin you are a genious! I have been replacing stuff on this thing for a year now trying to fix that. I tried spraying carb cleaner in the opening and it didn't change anything.....so I guess it's time to do something about the ol carb....I already rebuilt it but I guess not well lol. Is it possible to just pull it apart and break the valve loose?
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Re: Mikuni secondary vacuum line question.
[Re: From_jeep_to_raider]
#944634
05/15/09 04:38 AM
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Joined: Dec 2001
Posts: 11,727
Web Wheeler
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I priced the bowl vent valve from the dealer it was $150 <img src="/forums/images/graemlins/zombie.gif" alt="" /> so I went with a rebuilt from FC the bowl vent is a dealer only item and does not come in any carb rebuild kit. <img src="/forums/images/graemlins/frown.gif" alt="" />
98 Montero with cold weather package
96 Toyota Land Cruiser, fully locked Mall Machine :-)
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Re: Mikuni secondary vacuum line question.
[Re: From_jeep_to_raider]
#944635
05/15/09 04:42 AM
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Joined: Jan 2001
Posts: 13,649
Web Wheeler
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The bowl vent valve is not in the std. rebuild kit. You have to source separately.
Not responsible for advice not taken...
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Re: Mikuni secondary vacuum line question.
[Re: fasteddy]
#944636
05/15/09 05:43 AM
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Joined: Mar 2008
Posts: 59
OP
Getting the Wheeling Fever
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If I get it rebuilt, is this included? Also, is 100% no way to actually fix it once it is stuck?
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