On Wed, 10 Jun 2009 12:31:00 -0500, Tim fired up the etcha-a-sketch and
Writing from experience, yes.
Well, actually, the clogged cat wasn't the original root cause, but it
sure messed stuff up.
I had a '95 Jimmy 4x4 with the 4.3L V6. The injector in one or more
cylinder got clogged and I started experiencing misfirings at around 70K
miles. (The injector for this truck sucked!)
After I got the injectors replaced, I was still having issues. I figured
the O2 sensors were fried and - upon checking - that was true. Replaced
Next it still was running rough. It was the cat.
Because of the other issues, the cat got clogged and needed to be
replaced. Did so at about 120k miles and all was well after that, except
for the 4x4 system going out. :P
It's a 1500 5.3 all stock. I put the old plug wires back on this afternoon
and got the same results. Your guesses sound progressively less expensive,
an O2 sensor would thrill me.
Would a bad injector cause the random misfires? Wouldn't a code come up for
any of those issues?
It does still have the original exhaust system, I've never had one last this
long actually. Is there an inexpensive way to determine if it's the Cat?
Thanks for your input, you guys are great!
Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here.
All logos and trade names are the property of their respective owners.