OK guys I have a 98 xj 4.0 and I just got done puting the engine back together after replacing my head gasket. there is slow crank, new battery, all sensors and plugs back in same spot, ground strap on back of engine on tight. can figure out what the problem is. when i try to start it with the door open and dome light on, its automatically a slow crank, but when I shut the door, it cranks like its about to start and slows down and voltage drops to below 9. could it be the CPS? if so where is it and how do I check it. If not any ideas?

 

charge battery with door shut

 

new battery though. still might help?

 

timing?

 

ok well I tried jumping it with the door shut and a little better but not much. and with timing what do I do to adjust that and how would I know if the timing is off

 

look under hood for white information sticker most vechicles now days timing non adjustabe when you try to start it turn the head lights on if the go real dim or off charge the battery

 

ok well i guarantee that its not the battery. lights do not go dim.

 

anyone??? Im goin crazy without my jeep! lol

 

Just a shot in the dark here, I don't know if there is a ground bolted on the head of a jeep like there are on other brands, but you might make sure you have a good ground to the engine.

 

You may just have a starter going bad. Since you have a good battery, I would check the battery cables, connections and grounds. You could jump the starter and see if you get better cranking or not. You can remove the starter and clean the mounting pad for a good ground connection for the starter.

The CPS nor timing affect cranking power. Those would just not let the engine start.

 

ok well I just went and got an OBD II scannor since the check engine light was on and its reading trouble code p0443
Evaporative Emission Control System Purge Control Valve Circuit anyone know what to do about this?

 

anyone?? Im stuck and cant figure this one out. Im going to get the starter tested tomorrow morning but other than that I have no clue.

 

that code aint gonna make it do what its doing tap starter wqith hammer see what happens could be going bad

 

haha dude 5:08am? you must be an early riser. but I tapped it and it didnt stull didnt start.

 

Sounds like the starter to me.... if you have a new BATT and it's draining below 9v when you try and start it... then something is drawing way too much power.....


edit: or you have a bad connection on the starter.....?