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11-17-2010
Was driving around this morning when the ses light came on, hooked up my code reader and the car was throwing the P301 code random misfire cylinder #1, I have fairly new plugs and wires, both were replaced in August, and I replaced all the coils in June. The only thing I can think of it being is a fuel injector. Is this where I should start? Is there anyway to test the coils?
11-18-2010
Swap the bottom coil with one of the other coils. If the P0301 moves to another cyclinder (say P0302-6) problem isolated. Hope this helps.
11-18-2010
Good idea. They are used coils co it may be very likely that one died.
12-10-2010
Swapped two of the coils around and still misfire cylinder #1.
I noticed it only pops up when I'm driving down the highway, I can clear the code and drive around town all day long no problem, but I take a trip down the highway and the ses light starts flashing at me.
12-16-2010
Alright swapped around some injectors and replaced all the orings, and still misfire cylinder #1....
12-16-2010
have you pulled the plug and looked at it yet?
12-17-2010
Looks like a spark plug.
12-17-2010
What brand of wires? switch them around too.
12-17-2010
Omnispark or whatever from Oreilly's. I order a set of Bocsh wires because all any of the parts stores in town had in were the cheepos.
12-17-2010
The cheepos that have the lifetime warranty are the best.
12-17-2010
Yeah those are the ones I have now, Matt and a few others in chat were saying that they went through 2-3 pairs of the cheepos before they finally got the premium ones.
12-17-2010
I just got NGK wires.
Crappy tire has disco'd bosch in favour of NGK.
12-17-2010
We have Duralast wires at Vatozone...
Perfect on a few 3800 cars I've done a tune up on.
12-18-2010
Now another problem has sprung up, where the fuel lines connect to the fuel rail I am leaking fuel........ I don't know if this was leaking before but it would explain my bad gas mileage and the reason I could smell fuel, reason I replaced the orings on the injectors. I don't even know where to start with that one........... Seems I try to fix one thing something else breaks..........
12-18-2010
Disconnect the connection and replace the O ring in there. They get old and brittle. I think they are .70 cents. Autozone has them.
12-18-2010
Ok I didn't think you could replace the seal, thats what I noticed after taking apart.
12-18-2010
I'm sure you could RTV it...but thats the ghetto way of getting sh1t done...
12-18-2010
LOL at nick...
You can buy a new quick disconnect which is around $10 here or go to autozone and fine the HELP! o-ring pack.
then struggle to get them out of your disconnects....
I like the replace the whole thing deal.
12-19-2010
Actually it was really easy to replace the o rings I did both of the lines since i was already down there.
But after all that and the new wires I am still getting the P0301 misfire cylinder #1..... I think a icm is the next thing I'm gonna check.
12-19-2010
Hurray for proper tools.
Next item is usually the injector, not the ICM.
Unless you have a bunch lying around like I do...
Try moving the injector or better yet ohming it out first.
16 ohms is stock IIRC.
Or 15.5?
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