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5

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, ...


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.


2

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 ...


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

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

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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