Holy cow, you guys, what great information. I am going to get this baby into the shop this weekend and figure it all out! Well, at least try...

I have a feeling that the pressure line going to the ALDA is the problem. I bet that has been overlooked by the PO and my indy as well. I'll just do it myself.

Should I use air to blow the thing out? Will blowing air under pressure be a problem for the ALDA? Or will that just push crud into the ALDA?

DS
87 300D

dlssmith,

Usually its the banjo fitting on the manifold that gets plugged or that end of the line. I wouldn't apply any pressure in the direction of the ALDA. The line can be removed at the electrical overpressure switch and blown out toward the banjo fitting.

P E H

PEH is right - don't pressurize the ALDA with air from a shop compressor. Blow back towards the manifold. The fitting at the manifold is probably gunked up - just unscrew it and clean it with a small drill bit & solvent. The switchover valve may also be plugged - if so, that can be harder to clean, sometimes they require replacement. You can temporarily bypass it for test purposes.

If you have a MityVac that can build pressure, you can also try pressurizing the ALDA by hand. It should pump up to 15psi and hold that steady, or leak down slowly. If it leaks down fast or you can't pump it over zero PSI by hand, the ALDA shaft seal is worn (about $5 + 1 hour labor to replace).

This is good. Will do.

DS
87 300D

Boy I am sure watching this one with interest...!! I have an 87 300D and GSXR really saved it, I hope he is correct

i ask because my 87 is getting 22.8 . great power fast but poor mileage
tia
JOHN M

22.8 sounds quite low. You sure the odometer isn't intermittent? Changed the fuel filters, air filter, etc...?

Well, here is the answer: I adjusted the ALDA, backed the screw out 1 and 1/2 turns. I think it has never been adjusted before. It is a completely different car!! Much more power and better mileage. I haven't done an exact calculation of the mileage, but the tank doesn't empty nearly as fast, so I know it's better. The big difference is the power and that the transmission shifts more correctly now. It also smokes less.

Thanks to all the input from forum members.

DS
87 300D

If you ran of WVO then all this milage stuff would be a moot point.

http://www.fueleconomy.gov/

click on "find and compare cars"

there is a better site that i will try and find that had:
tons of polution per year
avg cost per year at 1.50 gal



okay its the feds but it is a starting point to mileage.

__________________
currently
[1981 300 td tdidi 165500 dark brown/palamino-Brownie-mine-3k miles of ownership
1983 240d 162+++ Anthricite grey w/ henna red interior and hella lights-wifes car-Red

the above two cars are for sale
and can be seen on the cars for sale thread here. pix also available.


240d-144+ Manilla Yellow w/ palmino interior-greasecar kit-Blondie-the college kids car

23" gt 21 speed still on original tires-still got the nubs
21" khs tandem