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willysmjeeps.com :: View topic - m38a1 idle prob
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m38a1 idle prob

 
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gianjeep
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Joined: Mar 03, 2009
Posts: 35
Location: italy
PostPosted: Mon Mar 28, 2011 12:15 am    Post subject: m38a1 idle prob Reply with quote
hello people
i've got a prob with my fully restored m38a1
It starts and runs very nicely
but when idle after 1 minute black smoke came out from the exhaust pipe and the jeep idle goes down,and i've got to pull the throttle manually to keep the engine running,after few seconds the idle goes up and the engine sound is not clear and smooth. It pops,and black smoke comes out..
any ideas?
I have just checked the pump diagram and carburettor diagram but they are ok
I also reconditioned the autolite distributor...
please help me
gian
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gianjeep
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Joined: Mar 03, 2009
Posts: 35
Location: italy
PostPosted: Tue Mar 29, 2011 7:26 am    Post subject: Reply with quote
any suggestions?
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wesk
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Joined: Apr 04, 2005
Posts: 16283
Location: Wisconsin
PostPosted: Tue Mar 29, 2011 9:01 am    Post subject: Reply with quote
Which fuel pump, and carb are you using? What is their status, IE just rebuilt, used or new. What have you worked on, adjusted or changed recently? Have you checked the running fuel pressure with a gauge yet?
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45 MB, 51 M38, 54 M37, 66 M101A1, 60 CJ5, 76 DJ5D, 47Bantam T3-C & 5? M100

Mjeeps photo album: http://www.willysmjeeps.com/v2/modules.php?set_albumName=Wes-Knettle&op=modload&name=gallery&file=index&include=view_album.php
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gianjeep
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Joined: Mar 03, 2009
Posts: 35
Location: italy
PostPosted: Thu Mar 31, 2011 6:50 am    Post subject: Reply with quote
original carburettor
original fuel/vacum pump
rebuilt status with new diagram
I haven't checked the fuel pressure yet
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