Question about 1999 Honda Accord
I have a '99 Honda Accord (4 cylinder VTEC) and I had a new gas tank fill-up last week. Ever since then, my car has started to hesistate when I try to accelerate, although it does this only occasionally. Moreover, sometimes my car's idle is rough, like the rpm nominally stays around 800 and it suddenly falls to 300 or so and recovers to 800 in 1 or 2 seconds.
A few days after all this, the check engine light came on with P0420 code (and its the only code). Although the code says that the catalytic converter efficiency is below threshold and something maybe wrong with it, I am not sure if a bad catalytic converter can cause my car to sometimes hesitate and exhibit rough idling.
Could P0420 appear if the gasoline I filled-up with was of poor quality?
I would really appreciate every advice from you.
First thing I'd try is some "heet" or similar additive in tank to remove moisture, then refill with gas from a busy station & drive it for a while and see what happens.
Posted on Jan 02, 2009
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Posted on Jan 02, 2017
If the converter is failed (i.e. plugged) it can cause drive-ability problems (i.e. the engine can't get the exhaust out like it normally can). FYI, http://p0420.com
Fix the known P0420 code first, then if the rough idle, etc continues, continue diagnosing. IMHO, don't worry about the MAF, etc. until you fix the "known" problems.
Posted on Apr 15, 2009
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