drewactual
Full Access Members
if suggestions north of this post ^ fail, and after testing fuel pressure at the rail, consider either using a snap on to exercise the injectors individually, ensuring they work, or swap injectors odd bank to even bank, then monitor lambda on a reader. you can get a bluetooth dongle for >$10 (recommend elm 327) and download 'torquey' on a smart phone for free, which will allow you to monitor STFT/LTFT and lambda- pay attention to the STFT alterations. realize: the sensor data is NOT raw- the PCM data displayed is what the PCM is doing about the situation... example: a STFT showing +10% demonstrates a LEAN condition NOT a RICH- the adding of 10% pulse is to combat the lean... a -10% is a RICH condition, and the PCM is pulling fuel to combat it.
if you touched the o2 sensor to any kind of glycol (antifreeze) it's toast... gotta get a new one.
if the sensor (o2) is good it can only read what is happening... an exhaust leak or vacuum leak (un-metered air) can cause same reading. make sure those are addressed.
a clogged basket on one of the injectors could cause the reading as the PCM doesn't trim pulse on individual injectors- a bank (4 cylinders on a v8) is as close as it can get... one bad or partially clogged injector can do this. if the cylinders were any easier to access, i'd rec you get a scope and get a look at the walls- comparing them.. another and much easier way is to simply pull the odd bank spark plugs and compare them against a chart (google for one). you should be able to discover a lean cylinder quickly doing that. if it's proven lean, you hafta figure out why.
if you touched the o2 sensor to any kind of glycol (antifreeze) it's toast... gotta get a new one.
if the sensor (o2) is good it can only read what is happening... an exhaust leak or vacuum leak (un-metered air) can cause same reading. make sure those are addressed.
a clogged basket on one of the injectors could cause the reading as the PCM doesn't trim pulse on individual injectors- a bank (4 cylinders on a v8) is as close as it can get... one bad or partially clogged injector can do this. if the cylinders were any easier to access, i'd rec you get a scope and get a look at the walls- comparing them.. another and much easier way is to simply pull the odd bank spark plugs and compare them against a chart (google for one). you should be able to discover a lean cylinder quickly doing that. if it's proven lean, you hafta figure out why.
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