4.3L Vortec Getting a Rebuild
#281
Thanks Les, I think it is the mounts making a lot of the difference too. I took it on a 200km round trip road trip and camping for a night and it's doing great! Fuel trims are perfect all across the board it seems like it's running great. I'll also mention I have found no leaks at all, my engine is still all clean! SES light came on soon after the road trip but not to worry it's the annoying P0420 that has been haunting me ever since I drove around with a bad spider for too long...(a year and a half ago) I think I will just cut my cat out next weekend and put some spark plug non-foulers in to eliminate the light, but that's a discussion for another day, and another thread. Thanks again Les, I still can't believe every time I go to start it that it actually starts and moves under its own power with all those parts I put in it! I have learned so much here from you and I can't thank you enough for that.
I personally can't recommend the non-foulers to attempt to circumvent having a catalytic converter. Don't really see how they could truly work, anyways - doubt if they really slow down the O2 sensor response time so much that the PCM thinks there is a converter present retaining oxygen (during the tests that it constantly does). But admittedly I've never tried it. I always thought of using the non-foulers as being a form of Urban (Internet) Legend that has been spread without merit. Once a poster thinks they fixed something, they are unlikely to post another time admitting they were wrong - so it gets propagated as being valid. I never thought it made any sense, so I ignored it. (Just like many popular fixes start by replacing O2, or crank, or MAF sensors - because replacing them "fer sure" fixed someones vehicle)
Last edited by LesMyer; 05-24-2022 at 12:46 PM.
#282
You couldn't have said that better Les, it's a totally different feeling driving something around that you put together yourself. Thanks for this information about the non-foulers, I looked into it a bit more and it seems for some people the SES light does come back after a while. I'm not sure what I'll do now but I'll figure out something to keep that P0420 away, a new cat is just so expensive especially since we don't have any emissions checks here ever. Thanks Christine, lol I need that better mileage right about now. My other car that I was driving has a 2.5L inline 6, compared to the 4.3L V6 it was practically free for gas!
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AlaskanK5
Full Size K5 (1969-1991) GMT415 (1992-1994) Tech
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01-13-2010 07:05 AM