My 93 jeep wrangler 4 cylinder temp gauge doesnt work right. when driving the gauge reads 0 when i step on the gas the gauge moves to the right temp. i have installed a new therm. new water pump new rad.new temp sen.and the gauge still works the same. I have been told the guage is working right. need help????

the fsm 94 wrangler.
we have a free book, 93 YJ
see chapter, 8E-1 ? instrument...... (words only)
then chapter,wiring, (last is list)
see that? see pdf page, 55? index then on to instruments yj
page 44 real. PDF page 110. BINGO.
the it is.
http://www.jeep4x4center.com/knowledge-base/index.htm?utm_source=cj#service

or alldata.com
or any real FSM from jeep.

3 choices. always.

check you manual, fuse box cover and clean the contacts on the fuse box and where it plugs in

Do you have under drive pulleys? If so, you can expect that to happen. It does not mean that something is wrong. You may have a high volume oil pump too. I have under drive pulleys on my Camaro and the oil pressure and voltage readings go up. I have never had a problem with that. I would worry when the oil pressure gauge does not move at all $$$$$$.

First look at fuel pressure pump jam

u have to pull trans back or out to do this,,if u want step by step,,get a haynes repair book on ur jeep;;auto zone or advance sell them,,about twenty dollars,,it is not a easy fix,,

not sure what your asking

Wire on oil sending unit may have fallen off or sensor itself may have gone bad. Check both. If engine has no tapping noises, likely it's not a pressure problem.

When the gauge is at 0, is there any noise from the engine (tick, knock etc?) I would have someone put a mechanical gauge on there and read true pressure.Your driving pressure seems OK but if the low number is "real" something is wrong!

Assuming the t-stat is good, I'd look at the wiring next. Make sure the connector is clipped onto the water temp sensor/back of the gauge and that the wiring is not chaffed, etc. If that all looks good, replace the coolant temp sensor...they're $20 or so. If it still does it, the gauge is bad.

if you are not showing a temp. reading ,you may need to replace the thermostat. as far as the draft goes your vent is probably stuck open. i also have a '93 with the same issue. i could not adjust the cable enough to close the vent so i removed the grill on the cowl in front of the windshield, the vent door is down and toward the left side (drivers side).if you can not push it closed to stay,i used a large piece of foam placed inside a plastic bag to block it. it has worked fine for almost 5 years.