Only 2 places you can lose pressure while sitting for a while. Either it bleeds back to the tank or dribbles out of injector(s) that don't seat well.

 

hey I'm back lol... Ok I feel like this jeep is just wierd.... Short story, went to go for emissions again... Take the freeway get there pull in, let the guys do there thing, they get it on the dyno and it dies.... Won't start over, all electricals on, I can't remember if I heard the starter but anyways they push it off and leave it for me to deal with, I check my wires, uplug coil and plug it back in. Walaa my jeep starts, WTH is going on!

 

I suggest unplugging EVERY electrical connection in the engine bay you can find, whether engine related or not, and spraying it out with a good electronics cleaner, visually inspecting the terminals making sure they haven’t retracted into the plastic holder, and then plugging it back together. There’s a critical 10-pin connector for the front lighting system located in front of the air cleaner and behind the left headlight assembly. Don’t miss that one. Also be sure that the connectors to the ballast resistor mounted near the air cleaner housing are clean and tight.

ALL of the relays should be removed, the terminals wire-brushed until shiny, and the receptacles sprayed out with contact cleaner. Then plug them back in. I do this on every Renix Jeep I purchase or work on for someone else.

Revised 07/23/2012

 

O-fer-christs-sake. I don't f'n believe it. We got this far without checking the CPS? (It's a common cause of random dieing, and can be checked in the time it takes to tie your shoes!)


Anyone with an 87 to 90 Renix Jeep has two or three minutes to see that their
CPS is putting out at least .35 AC volts. I don't mean to come off rude, but if you can't connect a meter and turn the key, we may not be much help.
AC voltage CPS test; Small clips on the meter leads really helps. (you need contact with those little pins while it cranks)

Unplug the connector at the back of the manifold with wires going down to the bell-housing/cps. (it's a three wire plug, with only two wires)
Probe the two wires to the cps with a digital meter set on AC volts. (a 200 scale on mine).
Crank the engine and note the voltage. (jump it if your battery is low). Although .35 might work, I'd consider changing mine if it were that low. .4 to .8 is more like it.

 

lol I know its late but thanks again for all your help, my jeep is good to go!! I'll be replacing the cps and tps here very shortly, but I now have plates and she's running great!!! Now for a transfer case rebuild and I'll have 4x4!

 

Supper! You gonna tell us what was the fix?

 

ofcourse, so my master cylinder was bad, and the adjusters in the drums, that was brakes.... Cps is causing my no start every so often, the butterfly was off some and all I changed was the iac