Misfire cylinder 1

I'm new to the forum. This is my first post. I bought an 07 gen 2 a couple weeks ago. A couple days after I got it home the check engine light came on. I did a scan, it came up, misfire on cyl 1. I installed new iridium plugs, switched the no. 1 igniter with no. 2... code came back misfire cyl 1 again. I then did an ohm check on the injectors which were all spot on, then ran the engine and listened with a stethoscope to number 1 injector and could hear it clicking. Next thing I threw a can of Seafoam into the gas, drove that tank out and then threw a can of injector cleaner into the next tank... I forget the brand.. it's that stuff they've been selling for a hundred years that has MEK in it. Anyway... I cleared the CEL and it's been a couple days and about 50 or 60 miles without a re-occurrence. I'm wondering if this is a common problem with prius's? (I know... but I refuse to use the word Prii... it just bothers me) Because the engine is always under such a light load, I'd think it would be prone to carboning up and such. Also... if this light comes back I'm thinking the next thing I'll do is switch number 1 and 2 injectors to see if the problem follows it. Is there anything I'm missing here that any of you can think of? Thanks in advance.

 

I guess I was mostly wondering if there was a common problem with these cars that caused a single cylinder to occasionally misfire.

 

OK, the light came back on today... not sure what to do next.

 

Wow... just read through the service manual on changing a fuel injector. Is this as big a deal as it appears to be?

 

I'll try that. I expect I'll get spark because this problem seems to be pretty intermittent, and when I changed plugs, the one in cyl 1 looked pretty much the same as the other 3 so I guess it's firing. I will definitely change the injector if I rip all that apart... I've seen remanufactured injectors for like 28 bucks on Amazon. Any problem with using reman'ed injectors? Thing about the injector... It passes an ohm test and I can hear it clicking when the engine is running. Could it still be bad in spite of this?

 

Thanks Patrick.. and Seilerts. I'll let you know how things develop.

 

OK.. well, I changed the injector...Marone! What a PIA. Went back together surprisingly well, except... after reconnecting the battery I've got a brake light and an ABS light, and the brakes are spongy as hell and barely stop the vehicle. Any ideas?

 

Will do Seilerts. I did a scan with my code reader last night by the way and no codes showed up.

 

I found this loose canon plug over on the left side next to the brake res. Not sure if it's for a component that my base doesn't have or if I forgot to plug it in. I can't see any place to plug it in to.

<a href="http://claspics.com/19k9brl8/h0miw7r5/1333552837-140.JPG.php"><img src="http://img2.claspics.com/19k9brl8/h0miw7r5/1333552837-140.JPG_m.jpg" border="0" /></a>

 

Sorry, link didn't work. Copy and paste this:

19K9BRL8/H0MIW7R5 - ClasPics

 

OK... I found it. I had to pull the wiper assembly and tray off before I could see the female on the side of the brake res. So... out of the woods on that. Now I just have to drive around for a couple days and see if that misfire code comes back. But like it's been said by many on here... I'd rather have a check engine light than an ABS.

 

Check engine light came on again after about an hour's driving after I changed the injector. Did a scan... same thing: misfire cyl 1. To summarize, I've changed plugs, switched number 1 and 2 igniters and replaced the fuel injector for cyl 1. What's that leave... the wiring to the igniter? This is really frustrating.