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7

Does it make the most sense to replace an old car's entire exhaust system all at once? Considering your car is almost 10 years old, having to replace all of the parts in the exhaust system does not sound unreasonable, especially if your locality uses any type of road solvent during the winter months (they didn't in Montana where I'm from originally, but ...


5

I suspect that this is caused by one of two things although it could be a few more. It is most likely a sticky ISV. The ISV or Idle Stabilization Valve is responsible for allowing just enough air through the engine to keep it running when the throttle pedal is being pressed. If this is faulty, the car will run perfectly until you take your foot off the ...


5

Ethanol % PID is the cars best guess at the ethenol level is in the fuel. This is more common on E85 Vehicles. Commanded EGR is what the car wants the EGR valve position to be at, not all cars have electronic EGR valves some are simple vacuum solenoids/diaphragms. Happend to run into a truck with an electronic EGR setting a position code. Working


4

One possibility is that the turbo is sometimes over-boosting, which is being detected by the engine MAP sensor. The way that the engine ECU can control this over-boost to avoid engine damage is by limiting the amount of fuel injected into the engine, which would of course cause a sudden drop in power. The over-boost could be being caused by a seized turbo ...


4

If this is the V6 Accord, it very well could be an issue with carbon buildup again. It seems there was a tech bulletin which was issued by Honda about it for the 98-01 Accord and 99-02 Odyssey. I found a pretty write-up of how to get it really cleaned up, as getting it into a good state is quite a bit of a job. Here is where the write-up can be found with ...


4

Disadvantage is that tampering with emissions systems makes a vehicle no longer street legal. Other than that, it probably won't hurt anything at all. I don't see how removing EGR will increase power though. EGR closes at high power settings anyways. The gain would be entirely from some other feature of the racepipe (perhaps it's bigger). The fact that ...


3

As a vehicle technician for BMW I can assure that it is good for your engine to get rid of EGR. EGR systems are there to improve the exhaust gas quality and slightly win a few miles on a tank (in theory). What really happens is quite different. Your oil will become polluted quicker, your manifold / intake will get clogged by excessive amounts of soot and ...


3

I don't think you replaced the injectors. I think you replaced the spark plugs. Injectors are what spray gas into the combustion chamber, and those are usually replaced or cleaned on older cars. You said it happened right after the spark plugs were replaced. Why not replace them again? They might be the wrong spark plugs, they might have the wrong spark ...


3

Classic fuel starvation, probably caused by an old, gummed up fuel filter. Replace the fuel filter and purge the injectors (remove them from the head, crank the engine a few times and clean the injectors thoroughly). If this doesn't solve things get the fault codes read as it could be something like a problem with the injector loom.


3

Most people just clean the EGR port with a small drill and think they are done. Just inside where the throttle body mounts They are 2 side passages that are often overlooked. I had to bend a wire and dig them out. They were stopped up solid. I also took a pressure washer to the plenum. Lots of gunk and carbon came out. Hope this helps someone. Gene


1

A properly done repair for this should last for at least five years, repeats are rare, and I have done a lot of these. A repeat plugging is most likely due to poor cleaning the first time. If the updated tube was installed and it was properly cleaned consider these possibility's. 1) Excess oil getting into the intake from the PCV system, or other causes of ...


1

I suspect issues in two components of your car but since you have already mentioned that Honda people have had a look not 100% sure. Clogged up Intake: I know it sounds very trivial but a clogged up intake is sometimes overlooked. Faulty EGR system: Almost al of the symptoms you suggest are very much mimicking the symptoms for a faulty EGR valve here are ...


1

This answer is a bit hypothetical; please take it as one path to follow, that may be useful in this and other, similar, cases. Perhaps the clue to the problem is not in the spark plug (or injector?) replacement, but rather in this part: "I had a engine tune up". While we do not know if the OP had this performed at an official garage, if this was the case ...


1

I haven't found anything which definitively states one way or the other on the EGR valve for SKYACTIV-G technology. What I can tell you is the purpose of the EGR and because of that why the technology itself would not cause the demise of the EGR. EGR or Exhaust Gas Recirculation is a technology which was introduced to limit temperatures during combustion. ...


1

Many Honda vehicles of that age have "hot restart" problem due to a faulty fuel relay. The relay is usually inside the cabin, under the dash (I have no experience on the Accord, though). It should at least be possible to test if you have access to the relay. Examples: Civic relay video Honda relay video (Relay portion starts after about 5:30 on the second ...


1

P0403 is indeed the EGR system. The system includes actuators and electrical wiring and thier voltages, which all must be correct, not just the EGR valve assembly. Vacuum hoses and the EGR control solonoid are areas to check carefully. The PCV valve and system are also required to be checked carefully as they can affect the EGR valve if leaking air. The ...


1

Location It's located between your throttle body and the manifold. You would remove the air intake and the throttle body from the manifold to best accesss the EGR and clean it. Video Here is a youtube video cleaning of an EGR (exhaust gas re-circulation) valve that is a similar model to yours. Supplies To clean the valve you will want carb/brake ...


1

BMW use valve overlap to serve EGR. Most if not all of BMW engines DO NOT have an EGR valve. They use a system on the engine that they have named VANOS. This system changes the cam shaft timing so that it allows exhaust gas to remain in the cylinder during the inlet stroke. This has the same effect as an EGR system. www.bimmerforums.co.uk has a very good and ...


1

If you haven't found the answer in the turbo or egr yet, just thinking out loud, I can think of two possibilities Boost sensor - the comport uses this to determine waste gate control, and also uses this in many cases to determine egr flow.... If it is reading high, the computer may dump boost early, and assume the egr is not flowing enough. Not familiar ...



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