Why is my 2009 2.4L Honda Accord going into limp mode and dipping rpm at idle.
What is your question?
y 2009 honda accord 2.4 liter started having idling problem at red lights and in park. RPM would dip down but not up. Engine would act like its about to die so Id shut it off afraid that it was bad for the engine. Upon research I decided it might be a clogged fuel injector, I ran GumOut through the car through 2 full tanks. For 5 days after using the GumOut car ran normal. Once it started happening again i removed the fuel injectors and tested if they were faulty. They worked so i then cleaned them with B-12 until they sprayed right. For 5 more days the car ran normal until today while i was going 30mph the car went into limp mode and CEL started flashing. I came to a stop and CEL stopped flashing and the car was out of limp mode. I accelerated about 100 feet and the car returned to limp mode and the CEL was flashing again. I turned the car off and sat a moment. I turned the car on and the CEL was off and it ran fine. Went and had codes scanned and told me there was no stored codes…
What makes this problem better or worse?
Cleaned Injectors seemed to help temporarily or coincidentally.
How long has your 2009 Honda Accord had this problem?
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Hello, my feeling is that your fuel system is not where your problem is coming from. Although, perhaps now since you've used cleaner and removed and "cleaned" the injectors you may have created some concerns that were previously not present. Here in lies the problem with guesswork. If you guess and act invasively with components that never need touched -- your can harm them.
Meanwhile, the original concern, which is more likely related to spark plug issues, coil issues or your intake and exhaust valves being way out of adjustment -- remains. So, it's both / and. You have to address both areas, likely.
"Codes" are not the only thing we look for when checking for engine performance issues. You'll want to see certain readings related to air and fuel mixtures. What's the MAP voltage, for example?
A good hint: stop using these additives. They won't help you for active problems.
Seek guidance from a local shop near you who is educated fully and properly equipped with testing devices and tools as well as workshop manuals.
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