Acura Repair Questions? Ask a Mechanic for Answers ASAP
The following would need to be checked for this problem.
Verify that the correct factory spark plugs are installed in the vehicle. Check the spark output of each ignition coil. If there is a weak coil, it can cause the Engine Control Module (ECM) to indicate multiple misfires. Pull one coil at a time to determine what cylinder may have the misfire. Unplug the Exhaust Gas Recirculation (EGR) valve and verify that it is closed and that the EGR system is not causing the misfire. Add fuel to the engine through the throttle body and see if the misfire goes away. If the misfire does not go away and spark is good then check for tight valves. If the misfire does go away, then check fuel quality and injectors
Sorry Jim I was looking for more common problems on this modle if you are not an acrua tech please don't waist my time or yours.
No onl;y can pull codes
The most common cause for this is a clogged egr port. I see this all the time. The intake manifold needs to be removed to clean out the tube that runs from the bottom of the egr through the intake manifold. Over time, it gets clogged with carbon deposits and restricts the air flow...causing misfire codes. Normally these will clog between 100-150k miles.
The reason I asked about a scanner is to check for tight valves as Jim mentioned..this is very common after 80k. The map sensor should read around .95 volts when warm, idle. If it reads lower than .90, the valves are too tight. Checking it with a scanner avoids the fees of manually tearing into the valves to check them.
If you will pull the top plenum off and turn it upside down, the port will most likely be clogged...it would take about 30 minutes to check it. Even if it's not, its a good idea to clean it out....its sure to be getting dirty with 103k.
The valves on these are adjustable just like all other Honda's so they will adjust out if necessary.
You may also want to check the fuel pressure. I have seen a few regulator problems with these.
Fuel Pressure regulator
Pressure with regulator vacuum hose disconnected
'99-'00 models: through engine number(NNN) NNN-NNNN/p>
280-330 kPa (2.9-3.4 kgf/cm2, 41-48 psi)
'00 model (engine number(NNN) NNN-NNNNand later), and '01-'03 models:
330-380 kPa (3.4-3.9 kgf/cm2, 48-55 psi)
You might also want to check the compression on the problem cylinders just to be sure. It needs to be around 120-130 psi
Ok thats the kind of info I was looking for Thank you