RatsunSam Posted December 18, 2019 Report Share Posted December 18, 2019 My 84 Nissan 720 has the z24 carb, i swapped the original carb with a Weber 32/36. Anyway I notice I’m always getting 200 miles on a tank which is about 12mpg. Any ideas, O2 sensor if it even has one ? Quote Link to comment
datzenmike Posted December 18, 2019 Report Share Posted December 18, 2019 O2 sensor (even if you have one) isn't much good to you if you replaced the stock carb. I would put the original carb back on and see if improvement of not. Pull one intake and one exhaust wire off, put a plug in the end, lay on a grounded surface and confirm that you have a spark while cranking the engine with the starter. Both sides need to be firing. Check valve lash. 0.012" on all Check ignition timing. 3o BTDC 1 Quote Link to comment
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