99xjwilson

Ok so my wires to my oil pressure sensor lost the coating and battled since then the guage is on the fritz... now when i put the jeep in reverse sometimes it imediately dies and sometimes it will stay running till i give it gas then just falls on its face.... also when at about 45 it drives fine but every now and then mainly on bumps guages drop itll stall then goes back to normal what could this be?

steelybill

What year is it ? That will help the folks here, to help you...

tjwalker

1. Yes, year and engine. From your name, is this a 99?

2. Any check engine light? If so, must retrieve codes for clues.

3. Freshening grounds is never a bad idea. Start with this. How to do this shown below.

4. Never underestimate the importance of fresh tuneup hardware. Fresh Champion plugs, new plugs wires, distributor cap, rotor.

5. This is not related to your oil pressure sensor issue. That does NOT affect driveability.

Good luck and keep us updated!
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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.

DFlintstone

Hey Tom...Dieing + Gauges + 99.....CPS? Ken posted that if the gauges are dead you can try unplugging the CPS, if they come back it's the CPS. (hope I got that right). Nice writeup Btw!

CCKen

Here's the ground points in a '99 engine bay.

https://www.cherokeeforum.com/f2/gre...e-6558/index4/

Scroll down to post #49.

tjwalker

Good thing to ask clarification on DFlintstone..

When you say the gauges drop out, do you mean all gauges or only one or a couple? Pretty important distinction.

Crank sensor issues are usually tied to an intermittent drop in fuel and or voltage gauges.

CCKen

No response from OP....