P0300 p0301 p0303 p0305

[bigmoe88]

Hi guys, so on my way to the mall today my car's CEL started blinking. It runs fine when I accelerate, but when I idle it jerks pretty bad. I have a 2000 EX V6 with 104,XXX miles on it. I change the spark plugs (and valve cover gaskets) back when I had 89k on it and I changed intake manifold gasket and did the common EGR valve fix for my car when it had 98k miles on it. Now the car is in the driveway and I am having it towed to the dealership Monday morning to have it looked at. Has anyone here had those codes come up before and what needed to be done? The CEL just blinks when I drive in case any one you guys were wondering.

[changaroo]

those are misfire codes...

have you tried changing out the spark plugs / coil packs etc?

[bigmoe88]

I changed the spark plugs last summer, I got OEM Honda replacements. The coil packs haven't been changed yet. Would it be a coincidence that it's misfiring on half the engine cylinders on the same side of the block?

[bigmoe88]

So I just got back from the dealership and they repaired my car. Total cost: $492.xx after tax. What was the problem? Well I was told the coil pack on cylinder 5 was bad and that was causing all my cylinders to misfire (by the time I got to the dealership (about a mile and a half from my house) it went from 3 cylinders misfiring, to all 6 misfiring), which in turn messed up my spark plugs on all 6 cylinders (even though I replaced them with OEM Honda plugs about 17k miles ago).

So I was charged 18.35 per plug and around 95 for the coil pack. I asked them to price match Majestic Honda and they said they can't match the online price so I was stuck paying full price unfortunately. This was one of those times that I needed the car ASAP and didn't have time to purchase the parts online, and wait for them to ship and then do the repair. Also, the guy recommended that I do the timing belt change soon since I'm at 104k, which I will be doing this Summer.

One question I have for you guys is, since one coil pack went bad, shouldn't the others also be on there way out too? Majestic Honda has them for 50 bucks a piece. I can buy the other 5 and I can install them myself and can potentially avoid the cost of having the current ones break and run into the same issues as I did the other day. Do you guys have any suggestions?

[SouthStar019]

interesting i have the same problem except mine is only
cylinder 4

[DonutLimo]

Originally Posted by bigmoe88

One question I have for you guys is, since one coil pack went bad, shouldn't the others also be on there way out too? Majestic Honda has them for 50 bucks a piece. I can buy the other 5 and I can install them myself and can potentially avoid the cost of having the current ones break and run into the same issues as I did the other day. Do you guys have any suggestions?

I don't know why one coil pack would mess up firing on all cylinders but they are interchangeable and look easy to do (my 99 has the crummy but reliable distributor setup or i'd tell you for sure it's easy)

[SouthStar019]

i got mine done at the dealer also, except mine ended up being the injectors and a hefty repair bill.