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CHECK ENGINE LIGHT ON. JUST HAD TUNE UP COILS, SPARK PLUGS WIRE, FUEL FILTER/PUMP, PVC VALVE, OIL CHG/FILTER. AND CODE CAME UP BANK LEAN 1

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Check all the tube connections associated with the inlet manifold. Also check the connections to the new PCV. The code is indicating a leak into the inlet manifold. If this serious you will notice a laboured idling of the engine. WIth the engine at idle, where you can, pinch close, one at a time between thumb and forefinger, the air/vacuum hoses making connection with the inlet manifold for about 20 seconds. You might not notice any change to the engine note until you again open the tube up. This process should allow you to locate a minor air ingress leak. Also use your ears and listen for any wheezing, sucking, or whistling sounds. Lastly try spraying joints etc with alcohol spray. When the leak is hit the alcohol when sucked in causes the engine to speed up.

Posted on Sep 05, 2010

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  • Chevrolet Master
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Check for leaky intake manifold gasket. I spray carb cleaner all along the gasket with engine running. If the engine speed changes, there is vacuum leak.

Posted on Sep 05, 2010

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Engine light flashing and engine running very rough


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Codes 171 & 174, Aurora 03 4.0 v8, 123k


Lean fuel trim bank one and bank two, the oxygen is reporting engine conditions, you may have a lean misfire caused by worn sparkplugs, low fuel pressure caused by pluged fuel filter or a failing fuel pump, you are equipt with a MAF(mass air flow) under reporting or taking in false aire from a vacuum leak,you also have a MAP (manifold air pressure sensor) that can under report, For a 2003 the likely canidate for bank 1 and 2 to be lean is a need for a tune up , new spark plugs, the second fuel filter or fuel pump, and mosre likely a MAF cleaning why because when this sensor get dirty it under report the incoming air and gives less fuel. I threw the MAP in the mix but I doubt this would be a problem it monitors the EGR and if there was false air it would detect it and set of a MAP code. and ran the engine rich.

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2 Answers

Codes 177 and 188 appear what should I do to fix this?


CODE PO177 O2 SENSOR RICH BANK 2. CODE PO188 FUEL SYSTEM LEAN LIMIT PART THROTTLE BANK 2. CHECK FUEL PRESSURE YOU HAVE LEAN FUEL SYTEM CAUSED BY A STOP UP FUEL FILTER OR WEAK FUEL PUMP. AND REPLACE O2 SENSOR.

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Getting a code of misfire on cylinder 2, Bank 1 and lean code


Have you tried replacing the throttle positioning sensor?

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Check Engine light is on my 1997 F150 with a small V-8. The tester returns codes P0171, P0172, P0174 and P0175. What does all this mean?


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1 Answer

2005 Audi A4 Rough idel..


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1 Answer

92 Camry, have to start several times before engine turns on, onl


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3 Answers

Check engine light


A multi misfire may mean that one or more of the following has happened:
Faulty spark plug or wires, Faulty coil (pack), Faulty oxygen sensor(s), Faulty fuel injector(s), Stuck/blocked EGR valve / passages, Faulty camshaft position sensor, Defective computer.

The engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.e. spark plugs). Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule. I would suggest spark plugs, spark plug wire, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs). In some cases, the the problems were faulty fuel injectors. 

Random misfires that jump around from one cylinder to another (read: P030x codes) also will set a P0300 code. The underlying cause is often a lean fuel condition, which may be due to a vacuum leak in the intake manifold or unmetered air getting past the airflow sensor, or an EGR valve that is stuck open.

Good luck and hope this information helps, keep me posted, be glad to help you get the truck running 100% again. Not sure if your running a K&N air filter, and if you are there may be a flim of oil on the MAF sensor that is making you run lean. You may want to spray down the MAF sensor with a can of MAF cleaner. 

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3 Answers

Bank 1 burning to lean check engine light on flunked state emissions


It is a common problem, you will have to change bank 1, o2 sensor as it is covered in burnt oil and fuel telling the computer to run lean.
hope this help

Jul 07, 2008 | 1997 Ford Expedition

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