Hey guys, i am new here and this is my first post.i have a 95 cherokee with the 4.0 and about 115k miles on it, it is my plow jeep/sometimes daily. It has this strange issue upon starting, I have a video but of course as luck would have it, it started every time i tried to take the video,but still has the bogging start sound.

I have replaced the crank position sensor (aftermarket, and broke one bolt but it does not seem to move) i have also replaced plugs, wires, cap and rotor.

sometimes it starts fine, sometimes it hardly starts and i sit there looking like an idiot trying to get it to start (usually by talking nicely to it!) it will turn over then start turning over very slowly and not start. sometimes it will be fine, sometimes like in the video it will start but also turn over slowly.. Also sometimes it will start but run rough so i till turn it off and restart it and it will be fine.

any help would be appreciated!!

http://s1292.photobucket.com/user/Ky...i5luu.mp4.html

 

1. Have you ever seen a check engine light? If so, you must retrieve codes for clues and guidance.

2. Freshen your grounds. Often overlooked and extremely important. More below.

3. Freshen your starter connections. Measure with a meter the voltage drop between your battery and your starter.
-----------------------------------------
Grounds can be the root cause of many electrical gremlins. Refreshing grounds is NEVER a bad idea, and the investment of your time in this procedure is always well worth it!

You can't tell much of anything by looking at ground connections!! You must remove, scrape, clean until shiny the cable/wire ends and whatever they bolt to. Be sure to remove all paint from any ground connections.

Start with the one on the back corner of the head, and where it attaches to the firewall, as it deteriorates over time and is an area that makes it susceptible to damage. Best to replace that woven cable with a #4 or #2 gauge cable. You can attach the one end to the intake manifold if you would like.

Next go over to the engine dipstick tube stud. Remove the nut and clean the wire ends and scrape the block until shiny at the stud. Reattach tightly.

If you are so inclined, add at least a #6 cable from the negative terminal of your battery to one of the bolts on your radiator support.

 

it does not have a CEL so i have not checked. i don't actually have the proper tool to check an obd1. i have not gotten around to redoing all of the grounds. I just replaced the waterpump today and i was actually going to redo the grounds. Like i said though, its an intermittent problem.

I am a mechanic by trade, but i cant seem to pinpoint this issue, (i also usually just get lazy when i get home!)

thank you for the fast reply! i will add cleaning the grounds to my list, and possibly adding a new one..might be a good ides since it has the extra draw from the western plow anyway!

 

part of me thinks to try an OEM cps. it seemed better after i replaced the cps a few months back and it has since gotten worse.