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Unread 05-30-2013, 02:58 PM   #1
rejeep
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1988 YJ Wrangler 
 
Join Date: Nov 2005
Location: Rochester, NY
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Howell TBI issue

have been getting some hesitation lately in my 258 with Howell TBI..

started all of a sudden with no changes or mods.. Jeep would seem as if it was hesitating at higher RPMs...

got a code 44... O2 lean

swapped o2... no change
fuel filter... no change

Fuel pressure at TB is right around 12 PSI... low on the normal spectrum..
so at this point im assuming i have a low FP issue...

any thoughts?

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Unread 05-30-2013, 06:52 PM   #2
Michaelgoesrawr
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I'm not sure at all. Just giving you more to think about, are the injectors working properly?
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Unread 05-30-2013, 07:51 PM   #3
jbolty
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also look at the timing advance. vacuum and centrifugal
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Unread 05-31-2013, 07:21 AM   #4
Old4X
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Vacuum leak. Also, fuel pressure sounds too low.
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