91 YJ stutters but never actually stalls

GheenoeAGoGo

New Member
Joined
Jan 11, 2023
Messages
1
Location
SWFL
My 91 YJ stutters like it wants to stall, but never actually stalls. I have replaced fuel pump and regulator.

What should I do next?

It is also slow to crank when it is warm.
 

Flyer58

YJ Enthusiast
Joined
Apr 12, 2020
Messages
723
Location
Magnolia, Texas
Does this stall only happen at idle? I've seen the Idle Air Controller valve get gunked up and stick closed then open just before the engine quits.
Spray a bunch of throttle body cleaner through it and see if that helps.

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