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What is the O2 sensor reading? If it runs rough check the engine compression, run an injector flow test and clean and replace as necessary. Check the EGR for leakage. Drive it and see if the misfire codes return, I think they will.
Robert, have vehicle scanned for diagnostic codes. Check for vacuum leaks and if you have not done recently give vehicle a complete tune up cap,rottor,wires,plugs,filter's,etc, including injector/throttle body cleaning. Check the attached links,instruction and guides, Good luck
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Wow... Thats a lot of diagnostic codes. First... The cyl #1 misfire will cause the Engine to run rich giving you a rich running engine. Therefore the rich lean code. This misfire on cyl #1 can also throw a crankshaft sensor code as it will slow down engine rpm. I would change the spark plug and ignition coil to cyl#1 and have the codes erased and see if that solves the problem. If not, you then need to persue any codes that may reappear.
If one of the cylinders is not producing power the engine will be very sluggish. And you should have a check engine light on which would cause you to have the computer scanned for trouble codes. A miss will not affect engine timing.
The engine in your car is designed to run smoothly with maximum power
output and produce as minimal emissions as possible. When your car's
engine is not performing properly it can cause, low gas mileage, low
power output, increased emissions and possible internal engine damage
if left untreated. This troubleshooting guide is designed to isolate
the malfunctioning cylinder and troubleshoot to repair the problem.
Before we start we need to know one of two things; is the engine running
poorly at idle only and seems to be ok under power? Or does the engine
run fine and it's just the engine idle condition that is the problem.
If your engine is idling rough please visit, engine misfires at idle If
your engine cranks over but won't start visit engine wont start. If
your engine won't crank over visit engine wont crank over. If your
engine is running rough all of the time or intermittently you are in
the right place. Below we have created a guide to aid diagnoses and
repair procedure for most common rough engine running problems.
Step 1: Anytime you have a problem with
electronically controlled components such as an engine, transmission,
ABS brake, or SRS (supplemental restraint system, air bag) inspect all
fuses in the under hood power distribution center and under dash fuse
panels using a test light. If all fuses test ok continue to the next
Step 2: To check for problems
with electronically controlled components such as an engine,
transmission, ABS brake, or SRS (supplemental restraint system) and the
fuses test ok a trouble code scan is needed to identify any system
trouble. Use a simple scanner tool to retrieve trouble codes and check
if they relate to the specific problem, like an ignition coil failure
code. If a trouble code is present but does not pertain to the immediate
problem like an EVAP code ignore it until a later time, after the
engine is running properly. The reason we repair non-related codes
after the engine is running properly is because sometime false codes
can be triggered by a rough running engine. Once the engine is running
properly the code present might cycle and turn itself off. You might
say "if the engine isn't running right shouldn't it have a check engine
light and a trouble code?" Sometimes conditions occur that will not be
detected by the computer, example: if the intake or exhaust valve
operation fails the computer cannot detect the failure because the
problem is not sensor related, so the engine doesn't run smooth and the
computer thinks everything is ok with no codes. If the trouble code
retrieved relates to a cylinder misfire like an injector driver or
ignition coil failure first repair these problems then re-test system.
If no trouble codes are present proceed to the next step.