And i have already changed the MAF Sensor, Fuel Pressure Sensor, Fuel Filter and Spark Plugs. Also had a Tune-Up & Injectors Cleaned What should i check next? Maybe replace the Fuel Pressure Regulator?
If you're comfy with manuals then i know few websites that can help you with it. Bcause I've got
it from various websites so I know how each site deals. try www.reliable-store com . Very helpful
SOURCE: PO171 OBD-II Trouble Code " System Lean To Bank 1
Check PCV valve and be sure it is not stuck open. Check for vacuum leak at intake manifold.
SOURCE: Car starts then stalls out...
could be to many thing to take chances with, but most commonly;fuel filter,gas line antifreeze or a crack in your air intake which would take your vacuum seal away, start with the least expensive and work from their. Worst case scenario pinched fuel line
SOURCE: 1996 s10 2.2 engine starts but idles rough and will not rev up.
Hi! You must be frustrated by now! your code is marking that the O2 sensor is bad in bank 1. Did you replace the O2 sensor that is located before the catalytic converter? The S10 has an O2 sensor specially made for that cat. its about 30$ That would explain for your blackened spark plugs; your pc on the car is asking for more fuel. GOOD LUCK!!
SOURCE: 2003 GMC Sierra Has recently developed
You never replace anything, on a Wishing,Hoping,Pushing,Poking,diagnostic approach
You learn the vehicles Systems,Test,then Replace,if you have a failed component.
Work on the Misfire Issues.
Then you lean O2 Codes will go away.
Not a the plugs.
Think lean---Vacuum leaks,EGR Valve leak,EVAP System leaks,anything with a hose that lets air into the intake system.
Exhaust System leaks,near sensors
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