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New Middletown, OH
ok I cant say for sure what your problem is but it looks like some diagnostic procedures need to be performed.a fuel injector balance test needs done for sure along with a fuel pressure drop test.white smoke usually indicates a bad head gasket or cracked head but it could also indicate unburnt fuel in the exhaust.dont rule out the fuel pressure regulator as this could be the problem.a scan tool with live data showing fuel trims would really help you out on this issue.let us know how it goes,good luck.
I got a good main relay but it was so corroded it pulled the terminals up thru the junction box when taking out the relay.i cleaned it now the car wont start.no comm with the scan tool,no spark,no injector pulse after pluging the relay back in.thoughts?car fell flat on its face then regained power but after taking out that relay its dead in the water.
the cooling system is going to need pressure tested to find the leak as well as a possible head gasket leak test performed by either the blue fluid test or leak down test.
got rearended so hard today my hat flew onto the back seat n never left a mark on the bumper.now that's impressive.
some kind of vacuum leak is happening.a smoke test is probably whats needed to find the leak now n a scanner that shows live data to verify the repair.when the o2 sensor reports low voltage to the pcm the pcm will see this info as lean,so the pre programmed stragegy is to raise the short term fuel trim which adds fuel which is why your mpg is way down.
I believe that could be a collapsed vacuum line going to the map sensor.hard to say for sure but its so common on the gm 2.4 l engines.have someone look at it as the vehicle is started to see if it swells n collapses.it out front of the engine about the middle right under a electrical connection.the vacuum hose is about 6 inches long.
agree with answer #1.might be a diagnostic job for dans auto in Lowellville.i used to live there on liberty st.
my book shows 105,000 miles for that engine.
bank 2 is the side closest to the front of the car.sensor 1 is the upstream or pre-cat.
thats the wonderfull california air resources board(carb) at its best.i bet not one member of carb knows what a catalytic converter even does.