Only starts full throttle
Although this one is pretty straight forward.. I don't think your going to have any problems... just keep us posted!
CF Veteran
Joined: Jan 2012
Posts: 3,170
Likes: 312
From: Australia
Year: 1997 (RHD)
Model: Cherokee (XJ)
Engine: 4.0 ltr
CF Veteran
Joined: Jul 2011
Posts: 1,045
Likes: 1
From: Oceanside So Cal
Year: 88
Model: Cherokee (XJ)
Engine: 4.0 renix
you could put a fuel pressure guage on it, with the engine shut down check for fuel pressure bleed down. You may have one or more injectors leaking down into the cylinders causing it to basically flood out.
If you got good spark, and it cranks but dont start yoou could also pull a plug/plugs and smell them for fuel.
If you got good spark, and it cranks but dont start yoou could also pull a plug/plugs and smell them for fuel.
CF Veteran
Joined: Jan 2012
Posts: 3,170
Likes: 312
From: Australia
Year: 1997 (RHD)
Model: Cherokee (XJ)
Engine: 4.0 ltr
Starting with pedal to the floor, makes it start in so-called Clear Flood Mode, in which the injectors are shut...could be a clue towards leaking injectors. Or a subpar TPS...
Thread Starter
Junior Member
Joined: Jan 2014
Posts: 33
Likes: 0
From: Kalamazoo MI
Year: 1991
Model: Cherokee
Engine: 4.0 H.O
CF Veteran
Joined: Jan 2012
Posts: 3,170
Likes: 312
From: Australia
Year: 1997 (RHD)
Model: Cherokee (XJ)
Engine: 4.0 ltr
IF you're planning to eventually upgrade, you might as well look into that now. But first I would just check things, before you Gung Ho with all kinds of new parts..
Thread Starter
Junior Member
Joined: Jan 2014
Posts: 33
Likes: 0
From: Kalamazoo MI
Year: 1991
Model: Cherokee
Engine: 4.0 H.O
Thanks for all the ideas guys 
This is a great forum. I am planning on borrowing a fuel pressure gage from an auto parts store either today or tomorrow when I get time.
What are the specs for pressure?
I do not have an owners manual, and my Haynes manual is in the mail.

This is a great forum. I am planning on borrowing a fuel pressure gage from an auto parts store either today or tomorrow when I get time.
What are the specs for pressure?
I do not have an owners manual, and my Haynes manual is in the mail.
CF Veteran
Joined: Jan 2012
Posts: 3,170
Likes: 312
From: Australia
Year: 1997 (RHD)
Model: Cherokee (XJ)
Engine: 4.0 ltr
Will send you a pm with a link tomorrow for your own FSM...
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