So no more codes?
I drove about 70 miles yesterday and no cel have to check codes, Going on that Bear Mountain trek tomorrow which will be around 200 miles total so Ill have clear idea then. I still have the EGTs on the SDL system so get the blinking lights on start up. To bad as otherwise they have run perfectly.
Ok. So after about 70 miles I got a cel. The two stored codes were cat efficiency on both banks. There were also these pending codes on this list This list is after I cleared the cel and codes and when I got home. No cel yet but I have these What does the incomplete monitor mean? This app puts a red flag on that? Where to start now?
Monitors are the things that monitor their namesakes. You have not done an accepted drivecycle to statisfy the ECU which will "set" the monitors. Some states require a % of the monitors to be "set" to start your smog test. The trouble codes are a separate part of ODB2 which you also have to pass.
Thank you 1445 and 1449 are CAT temp (Vescovini). I would think I am getting these pending because of the EGT modules not matching the ECUs parameters on the low side. 1448 is the CAT bypass circuit. I believe my bypass is working fine but maybe not. How do I test that? The two that went to stored codes and a CEL were the cat efficiency codes which may be directly related to the Hyperflows. John said he thought maybe my post cat voltage was matching the pre cat a to much indicating the cats are not doing their job properly. I am going to create historical graphs and send them to Hyperflow for a comment on this.
Bob, you can test the bypass value if you have a vacuum generator - but that will only ensure the valve is not stuck - I did a video when I tested mine. Or, you could energize the solenoid to test it but you will need a vacuum generator or the car on (for the car's vacuum). That would test the entire circuit (assuming the ECU is providing the signal to open) [ame]http://www.youtube.com/watch?v=DE99IDyLaHo&list=UUdfsBjGT6HgNipgs3Kopb5g[/ame]
Thank you I have a vacuum generator. I was just reading some old posts on this and came across a quote by Watson that a TC/ecu issue on that center unit could throw this code. I am thinking that all of these pendng codes are related to the EGT modules I still have in the car. I can hear the exhaust valve open and I also hear the airpump on start up. Now, my air pump was not working until a month ago when I fixed the connector but I am sure I had heard the bypass valve open during that time. Some threads say the secondary airpump creates the vacuum for the valve. Is that so or is it manifold vacuum? If the pump is responsible then how did my valve operate the whole time? I had never heard that whining sound untl I fixed the connector.
Yes. Edit - Sorry Bob, I may be wrong - the vacuum may be used to cutoff the air flow from the pump. My mistake.
Bob, I just read the WSM and from what I can see, the secondary air pump does not create the vacuum. However, Vacuum is used to control the cutoff valve of the secondary air pump. Initially, I looked at the circuit wrong and typed too quick. So, your bypass may have always worked even when your air pump did not.
Right. That is what I was implying. I have heard it open al along and I had never heard that whine until I fixed that pump and that pump only comes on at startup for tw minutes so I kind of doubted that it was involved in the bypass vacuum as I have been on 4 hour rides and have always heard the valve open. I'll check it just to be familiar with its operation but I am thinking its the voltage thing on the center ecu as the other pending codes area as well.
Can you actually hear the bypass valve open and close or do you hear the volume change from the exhaust? My car is too loud and I cannot hear that valve open and close.
I dont think i actualy hear the valve I just hear the effect of the valve opening on punching the throttle.
