Quote:
Originally Posted by GTP Dad
The upstream O2 sensor would be the one of choice as the computer uses it for reference for fuel management. I would expect your fuel economy to improve. As for the rear sensor it wouldn't hurt to replace it as they do wear out. With the mileage on this van it would be a good idea to change it but not absolutely necessary.
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Thanks for the reply. Waiting for better weather and a new garage (we're moving soon,
Again! - Geez I feel like Baby Dinosaur). Then I can work on the van properly using my own tools. Think I'll just do 'Bank 1' first (on the exhaust manifold; - after plenty of PB Blaster and an over night soak) and see what happens after the ECM levels out a re-learns.