Has anyone had a Hewitt bypass quit working?

[Rednexus]

Oh, Ive read your build thread, @Rednexus . There are better goodies in there for me than headers. Believe me, you've got me in plenty of trouble as it is but I appreciate the encouragment.

If this is a 1ish hr DIY, I may just wait. I'm collecting parts for my builds and Im not sure this SAIS is up near the top of the list since it doesnt same me time/money bundling with exhaust.

I do DIY but this new truck is going to my mechanic. I need to get my p0430 and p0420 out of the way so I can register/plate this truck by end of next month.

What kind of emission checks do you have in AZ? Are they just a OBD2 check, or is there a visual inspection? You could also clear the codes, drive the rig for maybe 50 miles, and then get it inspected. If it goes through a few drive cycles and no code is thrown, that should be enough to pass it.

If it's not able to go through a few drive cycles w/o throwing codes AND your inspection is OBD2-only (e.g., no visual), you can get some 90 degree O2 spacers, like these. I have them on my GX with no front cats at all and have never thrown a PO420/430 code. But, if you have a visual emissions inspection, they'll be easily spotted.

And - glad to know lots of folks are reading my build thread. And, I also apologize for the martial friction it my cause. At least I caused it first in my marriage .

 

[4whom the bell tolz]

I have a Hewitt kit on my 2007. It went into limp home mode 2X last winter, under cold conditions where I hopped straight on the freeway after starting the engine. However, I've also found that the ground wire for the Hewitt kit likes to come unplugged. So I crimped down the connector a bit more. Not sure if that was my issue or if the Hewitt kit is no longer working. I'll see how it does later this winter and then evaluate other options.

check out “cold weather glitch” on the hewitt site. my 2007 has the glitch. i have to warm up and restart before hitting 60mph or i go into limp mode

 

[Rednexus]

check out “cold weather glitch” on the hewitt site. my 2007 has the glitch. i have to warm up and restart before hitting 60mph or i go into limp mode

I think mine most definitely has it, and that it's probably from my YotaWerx tune (as I had no issues before getting it tuned).