Post by
gr8scott72 »
https://forums.nicoclub.com/gr8scott72-u37410.html
Thu Aug 14, 2008 3:32 pm
About a week - 10 days ago, I was going to Wal-Mart with my wife and we took the J. When I first got on the road, I noticed a very faint misfire feel. (So faint that the wife didn't feel it but that's not a big suprise.) Just a few more miles down the road it went from just barely to BIG time misfire and the CEL came on. It actually went away all by itself before we got there but when I cranked it up for the drive home the misfire was back along with the CEL.
That night I pulled coil packs and narrowed it down to cyl #6 (of course, the last one I checked.) I swapped one from my spare stash but the misfire stayed. I called it a night knowing that it was probably a fuel injector.
I was able to remove enuf stuff the next day to get the ohm meter on the injector and sure enuf, dead open. No resistance. Great.
Since many of you know my stance on pulling the intake manifold, it was off to the fuzzycats.com site to reread the injector how-to.
Next day I bought a few dremel grinding bits and the next day I actually removed the rest of the parts so I could get the dremel to the injector. Over the next couple of days I actually ground enuf away to get that darn screw out. Each time I worked on it I would spray the screws and the injector with PB Blaster.
Yeah, yeah, I know I'm slow.
That back screw tried to strip out on me so I ground a little more so the screw driver was a little more straight down on the screw. I then took a hammer and tapped the screwdriver on the screw which straightened out the screw head a little. Then that little bugger popped loose with a 3/4 grunt turn.
I found a cool looking pair of pliers at Harbour Freight that looked like they would do the job. They are actually pliers made for hose and look like needle nose pliers with the very end bent to fit around a hose. This was perfect as there isn't much room to work with in there. (Vise grips are too big.) The injector came out with a little coersion and persuasion. Easier than I thought. That was the part of the whole job that I was dreading.
Putting it back together was much easier. I found an injector at Auto Zone WITH 2 new O rings for $99.50 total including tax. Lubed up the O rings with a little KY (yes, I'm married ) then took a small socket (fit in the top of the injector perfectly) and hammer and tapped the injector back in. Put everything back together with minimal fuss and got ready for the big moment.
Went to crank it up and it wouldn't fire. It just cranked and cranked. I checked the fuel and there was fuel pooring out the line when I took it off so that wasn't it. Tried again and still nothing. Something had to be wrong. Deep breath and back to looking. Finally I found it. I had undone 2 connectors so I could get to the injector better and hadn't plugged them back in. NOW, get in to crank and it starts to hit and then cranks and chugs from all the extra gas. I give it some revs and after a little smoke, it all smooths out. Oh, and no CEL.
Take it for a spin around the block and all is back to normal.
So, after 201,000 miles, the first injector took a dump. I guess that's not too bad.
Total cost was about $130.
$100 - injector$15 - couple of dremel bits (the small cone shaped one worked best)$15 - pack of Harbour Freight pliers(already had the KY)