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post #1 of (permalink) Old 10-14-2003, 02:23 PM Thread Starter
 
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trouble codes

SES light is on. Had codes read. Left and right banks running rich, knock sensor low voltage, and misfires are the codes of the month. I replaced the 4 o2 sensors and the knock sensor. Plugs, wires and cap are good. Disconnected the battery to clear codes and within a couple miles the light turned on again. What else should I look to replace? Thanks for the help.
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post #2 of (permalink) Old 10-15-2003, 01:08 AM
 
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Re: trouble codes

Get some starter fluid spray or WD40. Let the truck sit overnight so the engine is cold. Start it up and start spraying from the base of the throttle body out to the MAF. If you hear an increase in the engine speed, you have an air leak. Usually where you were spraying when it increased. Doesn't take much of one to throw engine rich bank 1 & 2 codes. If it happens at the TB, get a gasket set, take it apart, clean the surfaces, put the new gaskets on, and torque it down to specs. If it's the air intake hose, replace it. HTH
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post #3 of (permalink) Old 10-15-2003, 10:19 AM
TheZenTree
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Re: trouble codes

my truck threw the banks 1 & 2 running rich code about a month ago. the stealership rebuilt the fuel injectors, and that solved it. i didnt get the knock sensor code, however.

maybe that'll help. [img]images/graemlins/wink.gif[/img]
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post #4 of (permalink) Old 10-16-2003, 02:13 PM Thread Starter
 
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Re: trouble codes

I had the dealership hookup a Tech2 (the guy did it for free) to read codes more complete, and the 3rd cylinder had misfired 2 times. Not much to worry about there. But he did say that my K&N Air Filter would, after time, cause the bank rich codes due to oil from the filter messing up the sensor in the MAF. He said spray down the MAF with carb cleaner to remove any oil film. I plan on having them do a full 1 hr diagnostics test on it next week to pin down the exact parts to fix. Thanks for the input.
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