Join Date: Oct 2001
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Needing help, YJ will not run right
OK here is the deal. A week ago i replaced my thermostat with a new 195. Now ever since we have owned the jeep it never went over 160. (ownership for appx. 5 years)- just thought it was a cool running engine. Then stuff started to heppen. The idle used to be perfect, but gas milage was less than par, 10 mpg. Ok, after the thermostat was replaced and the temperature climbed up to 195-200 and sat there. Yes it would rev up much more smoothy. Although it started to boggel at idle, unconsistant.
Then one nithgt it sat outside and it got really cold. Once the temp was up, it was all i could do to keep the blasted thing from dieing. It is a nutter carter. My theory is that the choke is now turining off and i am runnin gout of fuel at idle. Yes i have tried to adjust the idle and mixture screws. I also replaced the 2 base gaskets.
Can somebody please help me un disclose my vaccum readings also?
2000 rpm- 16
2000 rpm (steady throttle)- 15
deceleration- 15 drops to 0
Apply 1/2 thorttle- 5
I also did a volt meter test on the disconnected 02 Sensor-
normally it sits round 6 volts, from a 12v power supply.
I have also installed new plugs, gapped to 35, wires, and cap. All tripple checked on instalation.