Quote:
Originally Posted by idkthissucks1234
To: Legendary Mystery Buick 3.8, 27 mpg city (taxi), 44 mpg hwy
I have a 1999 3.8 bonneville same as buick looks different... I snipped the o2 sensor on and I get 35mpg sometimes when before it was 17-22. Can this cause problems in the engine if I'm somehow starving it of fuel? Cumberland farms gas gets better gas mileage for some reason too but I don't know why.
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The engine can be damaged by running too lean.
I had a 2.8L Camaro that had a bad Intake Air Temperature sensor that was faulty. It had the engine running lean all the time.
Eventually I over revved it and it threw a rod.
I salvaged the heads, tore them down and found the exhaust valves to be burned up pretty good. If the engine had not blown the exhaust valves would have caused almost compete loss of compression if it ran for much longer.
Now I am intentionally running lean burn on my 7.4L suburban engine at part throttle. In a few months I hope to pull it and tear it down and see if my part throttle leaning has burned valves.
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1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.
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