91xjcherock

So about a month ago I started my jeep and it ran for about 10 min and just died. I found out I lost power to the fuel pump but still had spark. Then about 5 min after that no spark. To me it sounded like i needed a cps. So I bought a new one still same thing no spark. Actually im not getting any power to the distributer or the coil plug. I checked all the grounds and still nothing. the guages also stopped working. Ive been searching for about a month on all sorts of forums hearing all the things ive checked. This is my last resort does any body know how to fix my problem or has anyone had this problem and what solved it. thank you

91xjcherock

bump

odgreen

You have us all stumped.

mr white

You have any power to anything?

Txssp

I would check the under hood fuse box it's on the left hand side I'm betting that if there's no power to anything that it's a blown fuse.

tjwalker

1. Check all fuses/relay in both the power distribution center under the hood and on the kick panel.

2. Freshen engine grounds! More on that below
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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.

91xjcherock

I checked the fuses and relays all good tested with multimeter and triple checked grounds still nothing. Thinking pcm, going to. JY in a bit to see if I can't get one for cheap ill post what I find out

Bustedback

Do you have voltage at the primary plug on the coil? Do you have a pulsing ground at the primary plug on the coil? No voltage means there is an open in the circuit someplace. No pulsing ground usually means either the crank sensor or cam sensor(aka pick up coil) is bad.

91xjcherock

Just got a pcm and relays from jy for 40 bucks. The CPs is brand new. If this pcm doesnt work ill try a new can sensor. Besides those could it be anything else

Cherockee

ASD relay maybe? Sounds like you have an electrical problem so study the wiring diagrams for your vehicle and trace power and grounds.

tjwalker

The fact that you don't have any power to your gauges indicates more of a "systemic" problem and is most likely not a sensor (if your gauges worked before this)

91xjcherock

The pcm didn't change much besides I get power to the coil but no power to the distributer an no power to fuel pump with a relay in but with a jump wire I do

91xjcherock

Can the oil pressure switch cause a problem like I'm having

odgreen

No.

SHANE 87

Check the engine control 1 fuse under the hood