Hi everybody thanks in advance for the help. A little history. A week ago I noticed a gas smell and found the source to be the return line at the back of the fuel rail. Got some new viton orings and fixed that. While I was in there I wanted to remove the map vacuum line so I wouldn't break it in the process, well it snapped into many pieces during removal. I cut the rubber ends off the old one and attached them to a metal brake line of similar inner diameter. Jeep ran good for a full day and got much better gas mileage. I put on 90km before the gauge came off full and I only let it click once at the pump. (All city driving with 4.5lift, 32 tires and 4.10s). The next day when leaving work while in a rush, I tossed in the block heater cord and closed the hood. Well I think I bumped the ballast resistor pretty good when this happened. My symptoms: when the jeep has sat for a period of time say 5 min it won't continue to run unless I give a little but of gas at the beginning. Without giving any gas It catches and runs for less then 2 sec. Only during the initial start does it need the extra gas, after that idle goes to normal and jeep seems to run fine. Another test I did was after the jeep ran for 5min i shut it off and started it immediately after with no problem Thanks again for the help

 

Jump the ballast resistor.

 

I'd check the TPS.

A bad ballast resistor will not cause the symptoms you describe.

 

The problem has been intermittent the past few days. Sometimes it starts fine without giving any gas.

 

No it may not but jumping it eliminates from the picture.

 

So I jumped the ballast. Started fine afterwards then 2 starts after back to the same problem. It seems to only continue to run if I rev it over 3000 at start or 3000 and a second blip of the throttle. Does seem to be getting harder to start though. But still intermittent. Headed to the lake tonight so I'll post results on the tps test later tonight. Tps is not even a year old. Old tps is still good though so at least I can put that in if that's the case

 

So can I just do cruisers voltage tests for checking the tps or is there more to it? Also just talked to a guy and he said check the wire mounted at the back of the engine held on with a little fray clip. No other information lol, anybody any ideas what he's talkin about.

 

You do the test that's documented on here but also do a full sweep test.

That is simple to do.

The wire you probe to get your variable reading from, just keep your meter on it and slowly open your throttle all the way.

The voltage climb should be nice and steady with no spikes or drops.

If there's spikes or drops it's bad.

Do this with the engine off, key on.

 

Id also refresh the grounds since you brought up a wire issue.

 

Ok so tps is 4.82 and .80 very slight adjustment needed. Voltage sweep looks good just using a crappy digital though, digital sweep maxed out at 4.56 accelerator right into the carpet. I'm leaking oil from the dizzy mounting gasket though I believe. I replaced that paper gasket bout a year ago and it was good for a while back but think I did something wrong because it never did stop the leak. Can some sort of oring be used here rather than a gasket? Even with the leak the sensor stud is bone dry and shiny. But I'll clean it up in the morning anyway.
One thing I did kind of notice this week was that the problem seemed to happen more often in the early morning and later at night but not so much during the day. The difference being at least 10*c between those times as currently temperature drops below -20*c in the evening and morning but has been around -10*c during the day.

 

Here's a pic just so you guys can get an idea what your helpin me out with. Also I got just under 12 mpg this week all city driving. I'll have a decent highway mileage number when I fill up on Sunday back in the city.

 

I've heard of people using o rings for dizzy gaskets.
And dang it cold there eh? Just to make sure, the times it dies after starting, when you turn the key can you still hear the fuel pump priming?

 

A bad fuel pump ballast resistor will indeed cause issues with starting, then dying.

Reason is the fuel pump is given 12 volts upon starting and then when the ignition switch goes to On, the power to the fuel pump is run through that resistor.

And, I've never seen a TPS cause these issues. Heck, unplug it and start the Jeep. See what happens. The big issue there could be with the ground circuit shared by the TPS, MAP, CTS, and IAT.

Now, if the hose from the throttle body to the MAP sensor is messed up, you can get the symptoms described.

If you're gonna do the Tips, do 1,3,4, and 5.

 

] I've heard of people using o rings for dizzy gaskets. And dang it cold there eh? Just to make sure, the times it dies after starting, when you turn the key can you still hear the fuel pump priming?[/QUOTE] It's actually been quite warm here the last week or so lol. Here in manitoba we really do go from one extreme to the next. Barely a week ago it was -38. I'm ashamed to admit it but I generally don't listen for fuel pump. I think the pump on my 98 is louder than my 90 lol. Should I just be listening for it for those first few seconds that the key is turned to the on position? Your thought on the pump has got me thinking a bit and I'll clean up any connections around the tank when I do the others. Unfortunately somebody broke into my jeep this last week and smashed the passenger side glass doing so. So getting the new window in and also trying to fix the lock in the door as well is my first priority. (Lock was broken before since purchase, for some reason just can't turn the lock cylinder by key, works fine otherwise. This is extremely annoying as I have to jump in the jeep to unlock for passengers, any tips?) Thanks cruiser I'll see bout getting the steps done and get back to you.

 

Also cruiser about the map vacuem, I tried to make the line as straight as possible and with a consistent slope towards the tb as I read u posted in another thread. The Inner diameter of the line was darn near identical to the stock line as well. I read about others doing this mod with success and I would like to consider it as an upgrade over the stock line. I know that your the man when it comes to these renix jeeps but if others have done this With success maybe you can show how you routed your line.