gas mileage suffering

[Jeepenstevo]

1045242

I put a new carb, O2 sensor, and pcv valve in my 1990 Jeep wrangler 4.2L 258 I6. Before i put those things in i was getting around 200 miles a tank now im only geting around 140 a tank. If anyone knows why i getting such shitty gas mileage that would help. thanks. [addsig]

 

[Bounty__Hunter]

1045248

Probably a vacuum leak. Check with carb cleaner or an unlit propane torch. The idle will jump when you find the leak.



Also check for collapsed vacuum lines, very common on that old of a 4.2L engine.[addsig]