martyp

Will do tomorrow and report back. Thanks!

StratfordShark

Thanks for posting photos Marty and Bob - can see how it makes access to fuel (and other relays) awkward. It's not a problem on RHD so have found an advantage of RHD for working on the car!

martyp

On the nose Bob.

I have 12.5 fairly steady at the FPR end of the rigid line that goes to the 5-way manifold. I couldn't get the flexible hose off of the FPR itself, but as it turns out, that's a non-issue.

So, in my exuberance I traced the vacuum through the 5-way and managed to pull the throttle body end off while attempting to test the 5-way. Sigh, guess it's time for a TER since I see no way to reattach to the throttle body without using a shrink ray on myself

FWIW the rest of the rigid and flexible lines attached to the 5-way, and the 5-way itself all hold vacuum, so it's at the throttle body anyway. At least that's how I read the PET diagram.

Thanks for your help. I'll be down for a while until I get the top end completed. I wish I had a heated garage so I could do these types of things in the winter instead of waiting for it to warm up. Sigh again.

On the silver lining side, at least the engine will be cleaner (and safer) once I get done.

martyp

I guess if one can get the hang of shifting with the left hand it all works out

Cheers

Bill Ball

12.5 - what altitude?

Actually, you should be able to reattach the vacuum line to the throttle. Remove the MAF, get a mirror and flashlight to help you see where it connects to the top of the throttle.

martyp

Hi Bill -

I'm at 6,450. Atmospheric pressure should be a lower, but how much?

After looking at Dwayne's TER extravaganza I see that you mean about reattachment. I may be able to do it if I remove the MAF, which I need to do to test anyway. The electrical connector is up against the driver-side rear intake runner and can't be removed with the MAF in place, so . . . .

Thanks for helping.

Alan

I think the easiest way to just run the fuel pumps is to unmate the related CE panel plug that feeds the fuel pump (on a '94 its Plug U). Then connect a fully insulated female quick connect to a battery power feed - conveniently the U21 pin on the empty CE panel socket ( on a '94) - then route this via a switch & in-line fuse to a male quick connect that connects to the plug (loom end) side of U25 that runs to the fuel pump.

Alan

Bill Ball

12.5 sounds OK for that altitude.

SeanR

Have you checked to see if your Temp II sensor is good? How about the associated wiring attached to it?

martyp

Agree. Forsaking my wasted youth (chemistry was between me and the girls ) and using the calculator at

http://www.altitude.org/air_pressure.php

I get 607mmHg, which I then plug into the calculator at

http://www.anver.com/document/compan.../pressure.html

and get 11.74 as the expected value. Ignoring temperature, etc. So the 12.5 I read looks OK.

On to the MAF . . .

Thanks Bill

martyp

Yea Sean second thing I did after a ground point cleaning. Went ahead and installed a new one even though mine looked OK, seemed like a good thing to do.

Bill Ball

Marty: Manifold vacuum is not equal to air pressure, but it is proportional to it, all other things being equal. It usually runs 16-18 inches of Hg at sea level in 928s I have seen (mine measures 17 inHg). At 6500 feet, air pressure is about 80% of sea level, so I would expect 12.8 to 14.4 inHg. You're a bit on the low side, but close. Maybe your cams are retarded.

dr bob

All we are looking for is the right hose attached to the fpr. Looks like it is/was..

martyp

Good to know Bill. My MityVac manual indicates 14.7 as the base sea level value, so I extrapolated from there. Probably more retarded here than just my cams

martyp

Yes, the correct hose appears to be attached. I think I can get back to the baseline configuration once the MAF is removed. I'll report back once I have more data. Thanks!