I failed echeck today in Ohio. NOx was just a little high, all other numbers passed. I just bought this 95 4.0 auto wrangler an have only driven it about 10 miles total before taking taking it in for testing. Had trouble getting a top for it, got that done today. any chance that driving it an running some injector cleaner through it will help? I read you can cheat a little by retarding the timing. I have a timing light from my 5.0 days just need to know how the jeep works (do you have to unplug anything before, etc). any info appreciated!
it's not over by much. standard is like 1050 an I'm at 1115ish. there's some sort of vac lines coming off the rear of the valve cover that the PO stuck in there an taped in place, could this be a little vac leak?
No egr on the 91-95. If you are running high nox it is usually related to the cat. Alcohol additive or a few gallons of E85 will probably get you through if it is real marignal.
Exactly what I had to do, replaced my cat with a cheap universal from Oriellys and problem solved.
I just cut the Flange off my OEM one (catalytic convertor), and welded it onto the new one after measuring.
"You're only Limited by Your Own mind."
91 YJ, rear body armor with rock rails and TJ filler conversion. LED Tail lights. 33 x 15.50 x 15 SS TSL SX's on black steelies. Home made Bumpers and swing out tire carrier. MileMarker H9000 Winch, H/T & Bikini Top, full doors & half doors. ~RIP~ C.D.K. 11-11-08 (miss you baby)
NTM 1989 XJ 2 Door Cherokee Sport, I6/auto/Swingout carrier, Custom Stereo system that makes my heart skip a beat.. IT'S My New DD and da^% happy to say I finally own one ;)