John I got the feeling this is 02 sensor issue, but I will check those valves too. Another weekend program. Thanks, Sark
John are you addressing # 37 as a vacuum reservoir and it is located under the battery. Sark Image Unavailable, Please Login
Sorry Sark, I didn't see your reply. Yes, that's the vacuum reservoir. It provides vacuum to actuate the inlet tract butterflies, and although I didn't trace the hoses, it probably provides vacuum to the solenoid valve that then feeds the two VSV's.
Thanks John, I am going after those 4 valves tomorrow, I will come back with some pictures if there were any residue inside the valves or hoses. Sark
Today I removed the cut off valves, there are 2, one for each bank. I applied vacuum and they fine allow the air moves towards the manifold (there is an arrow on the valve showing the direction of the air flow towards the manifold when installing back on) picture #1. Then I disconnected the hose to secondary air valve on the manifold and they are as clean as they should be( there are 4 valves 2 per bank picture #2. John now I believe there is an issue of oxygen sensor and I have no clue where to look and how. Any help appreciated also I ask pros to help. Thanks, Sark. Image Unavailable, Please Login Image Unavailable, Please Login Image Unavailable, Please Login
Sark, I'd suggest purchasing (2) of the upstream sensors (the expensive ones) and change them both, rather than changing one at a time. That will keep them both at the same level of contamination. There's probably a way to tell if their heaters are working or not, but you'd need a scan tool. Let's hear what the pro's said?
Sark, it's built into the sensor's assembly; it's not a separate piece. BTW, when I wrote about keeping the sensors at the same level of contamination, that may have been a confusing term, but these sensors are the primary means for the ECU's to detect and adjust the AFR's for the left & right banks of the engine, and they do "age" and begin giving bogus readings (which is where the downstream sensors come in, and help compensate for aging/contamination). So IMO, if an O2 sensor is determined to be bad, I prefer to change both sides, in order to keep both sensors at the same level of "aging". Hope this clarifies what I meant, and doesn't muddy the water further?
Thanks for explanation, I have a scissors jack and makes it very difficult to get to them. I may have to go to somebody. Thanks a million for walking me through this. Sark
Dave, this is made by BendPack and rated 6000 Lbs. I always had the fear of getting under the car on lift.
John I am working on timing belt issue now. I will keep you posted with progress with 02 sensors' with pictures. . Thanks for asking, Sark
John, I am driving her around. So far 200 miles and no check engine light. I had poor access to oxygen sensors so I stopped there. Who knows the light may come back or not, if it dose then I will go after 02 sensors. Just talking to the Ferrari tech he points his finger on the air pump, that is why I removed the cover to inspect the propeller. Any way thank you for your time and effort to walk me through this. If any thing comes up I will let you know, thanks again. Sark
Sark, those are the issues that drive you nutty, when they just go away and you're not sure why . Anyway, good luck with it in the future!
