Bad hesitation
#1
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Join Date: Feb 2010
Location: Rocky Face Ga
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Year: 1988
Model: Cherokee
Engine: 4.0
Bad hesitation
Ok guys, I have a 88 xj 4.0 and the guy i traded said it needed a fuel filter (replaced). And it still hesitates but only seems to happen when she is low on fuel and/or when im on the trail (fuel getting stirred up while wheeling), now im thinking that I have trash in the tank. What do you guys think? HELP PLEASE!!
#2
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Year: 1990
Model: Cherokee
Engine: The venerable 4.0
It could be fuel.. crap in the tank or the siphon hose on the pump eroding... I would pull the pump and investigate. When you pull other put a new trainer on it.
#3
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Year: 1999
Model: Cherokee
Engine: 4.0
Check fuel pressure WITH a gauge when symptomatic. You need 31 psi of pressure for the engine to be happy. Then disconnect the vacuum line leading to the fuel pressure regulator and the pressure should jump to approximately 39 psi.
Good data = good decisions. Test your way to a solution.
If you buy a new pump, try to find a Bosch. They are the best in the business when it comes to fuel pumps. Stay away from Airtex fuel pumps like the plague. I (and lots of others) have had nothing but problems with them. They are a low price point choice for a reason.
Good data = good decisions. Test your way to a solution.
If you buy a new pump, try to find a Bosch. They are the best in the business when it comes to fuel pumps. Stay away from Airtex fuel pumps like the plague. I (and lots of others) have had nothing but problems with them. They are a low price point choice for a reason.
#4
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Year: 1988
Model: Cherokee
Engine: 4.0
Thanks Tj, I dont have a symptomatic but maybe I will hunt one down.. kinda on a budget. Unemployed
Thanks guys!
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