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Update: no good news yet :-( 700 1990

posted by  someone claiming to be JohnB on  Mon Jul 18 04:08 CST 2005 [RELATED]

Hmmm...fuel pressure should drop significantly at idle...36psi is ok with FPR vacuum disconnected but should drop to 20 or so with vacuum line disconnected. A torn or leaky diaphragm in the FPR will give you extremely high emissions readings AND no change in fuel pressure at idle w/without the vacuum line hooked up.

FWIW I had a similar problem on my 87 900T saab...I replaced the cat two years ago and had the same problem this year....another new cat and the problem is solved again...this time I carefully saved the 5yr/50K warranty on the new cat for the next time!! Unless you replaced the cat two years ago with a genuine volvo cat, I wouldn't trust an aftermarket cat as far as I could throw it by it's tail!





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