Do anyone has installed the o2 Simulators on their 360 using straight pies?
No need. Most good straight though pipes tend to have fitted an adaptor ring so they slightly move the 2nd o2 sensor slightly out of the way of the first sensor. Volia, no CEL! Failing that just get a couple of nuts and fit them inline...
really? That doesn't make sense to me. Most other OBD2 cars I have worked on have had to have a signal modifier in order to not throw a CEL. moving it out of the flow still seems like it would be problematic... Matt
So far this has worked 100% of the time for me. Just drill a 1/2" hole to open up the fouler and this unit perfectly screws into the O2 sensor bung and perfectly accepts an 02 sensor. There are o2 sim electronics out there too but why bother when this manual method of repositioning the second 02 sensor works so well. Oh you get these at any autoparts store Image Unavailable, Please Login
I don't know what it is used for either but all I know is for $2.99 and a 1/2" drill bit you end the pain for 02 CEL's from the down stream sensor for about 5 minutes in labor! Something good happens when you reduce the exhaust flow to the 2nd sensor and that is what this thing does.
Were these used for Test Pipes? I'm going to put test pipes on my 360 and would like to make sure that this Lo~Tech approach is the solution. Thanks, 'D
So, You're using them on your test pipes right now? If So, that's great as i'm going to go ahead and give my business to one our guys here on the forum! Thanks David! Are you going to be able to make the Celebration Exotic car event on the 16th-18th? D
I tried this yesterday. I think I'm getting an unrelated error now, but I can't find what could cause it. Beforehand, I would get code P0422 (Main Cat Efficiency). After this change, I'm now getting P0102 (MAF low input). So I'm thinking that this is a self-inflicted problem as I must have disturbed something related to the MAF while getting to the O2 sensors. I did have to remove the airbox and also squeeze my hands between tubing and wiring at the O2 electrical connections, so it is possible. I did notice that the rubber boot connecting the MAF to the throttle body on bank 1 was loose, so I squeezed that clamp down to make sure it doesn't move anymore. Unfortunately it still pops P0102, in fact it is immediate. I also tried reseating the electrical connections at each MAF, but no improvement. I was not able to chase the other end of the wiring as it dives down behind the engine. Disconnecting the wire at each MAF in turn did not change the way the engine ran - just continued running super smooth either way. I hate to blame the MAFs themselves even though the code points that way because I barely moved them (just tilted them up enough to get the airbox cover off, which I have done a dozen times before). So, the question is, could the change in position of the rear O2 sensors have caused this code? Doesn't seem likely, but it is the only thing I've changed except for a coolant hose the day before (no code from that work). Lou
Lou, I would start by checking for air leaks. You could have left a vac hose unplugged or knocked one off or cracks some rubber bellows etc.. That code implys air flow problem vs. what sensor is registering. You could also take the maf out and clean it with maf spray. if those are no gos then check the relative voltages with against the other maf and check wiring. This could be another job for Scuderia Ramparte's gold connector kit.
Probably coincidense and the MAF has failed. Often the MAF will fail and cause other P codes and issues...except for ones directly connected to the MAF.
OK I installed the Fabspeed test pipes today. I also tried their O2 sensor extender. Well definitely sounds a lot better. The CEL stayed off until about 70 miles. I came home and it was PO159. I cleared it and will drive her again tomorrow to see if it comes back. If it does I will play with the angle of the extender to see if another angle will help. Back to the sound.... Sounds way better with my top down.
Just a quick update: 1. the new code was indeed caused by a failed MAF. Since the code wasn't specific to which bank had the failure, and the darn MAF costs over $1200.00, I brought the car to Apex Vintage. They were able to isolate the failed side with their ST5 tester. 2. So now that the MAF issue is out of the way, the old P0422 code came back after I ran some errands with the car, so the O2 extenders didn't help in my case. I may try to extend them further out as indicated in some of the VW forums, or maybe I really do have a bad cat or O2 sensor. Hard to tell but the cats had no codes for the first year and were flow tested when the problem started. The slow way to go would be to swap parts between banks and drive half a day between each swap to see where the problem moves to. I'd like to get traces of the O2 sensor outputs so that I can see what they are reporting to the computer, making this exercise a bit more scientific, but you need an SD2 for that. Not sure I'll get to the next step anytime soon. Lou
