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Odd vacuum loss 900 1994

posted by  rjk2 on  Thu Jun 23 18:19 CST 2016
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last visit: Sat Jun 21 05:30 CST 2014
[RELATED]

This just started and I am temporarily stumped.

1994 940 Turbo

Vacuum is only registering around 10 inches at idle in neutral.

I have pinched off each vacuum hose with no change so it appears there is not an issue in the vacuum motors or hoses.
Also checked the motors and they all hold a high vacuum.
I checked (and replaced one) of 5 small diameter hoses off the manifold plus the large diameter hose to the IACV.
Pulled the IACV and it seems to be OK, not binding, gave it a shot of throttle body cleaner anyway.

Checked all intake hoses as well for holes (just for giggles) but they are all tight.

I'm going to check the timing belt tomorrow to see if it slipped a tooth.

Any other ideas? Did I miss a vacuum line?
--
1999 E320-286K 1994 F150 (awaiting a new engine) 1989 560 SL-180K 1994 945T (daughter's)-349K 1986 242Ti (awaiting a B230FT transplant) 1968 GT500KR (under slow restoration) 2007 HD Nightster (son's ride)






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