Ok, 2000 lincoln LS with the 3.0L V-6
pulled four codes off this car, bank two catalytic code
and misfires on cylinder 2, 4, and 5.
I am hesitant to start pulling off this intake and checking my plugs because I don't have all data anymore, and I don't have a scope, all I have is my obd 2 scanner, and a digital multi meter.
Is there a way to back probe the coils and take a reading on a digital multi? I am not ruling out the injectors but I have noid lights for them...
thoughts? Suggestions? Online manuals? can anyone give me a five minute crash course in lincoln V-6's???
2007-06-02 11:37:08 · 4 answers · asked by Orlandoboat 2 in Cars & Transportation ➔ Maintenance & Repairs
I cleared the codes and now the MIL is off but the scanner still says a misfire on cylinder 4.
I am looking for vacuum leaks and found the crankcase ventilation system all messed up but still no help with the single cylinder misfire.
2007-06-02 17:37:30 · update #1
I'd check the simple things first.
A misfire dosn't mean you have no spark, it just means the fuel/air is not igniting.
Use a good screwdriver in the spark plug boot held near ground and check for spark while someone cranks the engine.
If there is a vacuum line on the intake that has come off, it may be causing a lean condition in those cylinders causing a misfire.
You may have a bad brake booster sucking air.
Is you EGR valve stuck open?
Eliminate the simple things first......
2007-06-02 11:47:11 · answer #1 · answered by Mr. KnowItAll 7 · 0⤊ 0⤋
You probaly have bad coils. Your scanner and DVOM will not find them. They tend to break down in the secondary windings. These coils fire 3 times per combustion cycle and I have had hard times seeing it even with a scope. I would replace the coils on the specified cylinders, clear codes and if your scanner has live data then you can determine if the CATs are damaged by driving it and watching the switch rate of the upstream and downstream O2 sensors or just see if the codes return.
2007-06-02 18:47:47 · answer #2 · answered by toolboxvoodoo 2 · 0⤊ 1⤋
Go to the library and get the Chilton Manual. Find the info you need and make photo copies. I suggest the library because I don't know if they have sites with the details that you need.
2007-06-02 18:46:23 · answer #3 · answered by charliecizarny 5 · 0⤊ 0⤋
hmmmm
2007-06-02 18:39:09 · answer #4 · answered by thesunshineking 2 · 0⤊ 1⤋