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Old 06-25-2006, 03:55 PM
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MercFan MercFan is offline
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Join Date: Nov 2004
Location: Denver, CO
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Some steps to consider...

Quote:
Originally Posted by 300TD
My concern is it's complete lack of power. It is dangerous in my opinion.
My car had the same symptoms when I got it - it barely (and I mean BARELY) made it up my driveway (~1% grade) - per advice from this Forum, here is what I did:

1) Cleaned the Banjo bolt (on the back of the Intake Manifold) -it was full of gunk - www.dieselgiant.com has a simple and effective pictorial on that.

2) I replaced all pressure lines (though you should try cleaning them first) leading from the banjo bolt to the switchover valve on the firewall (driver's side) - also thoroughly clean the switchover valve itself. Finally clean/replace the pressure line to the ALDA - this was key for me - having the clean passage from the Intake manifold to the ALDA did the trick for me.

3) Clean the boost protection switch sticking out of the intake manifold (should have a single wire coming out of it - be sure NOT to ground it...

4) What I did next was adjust the ALDA (3/4 turns CCW) and the vehicle 'came to life'... as per advice from others I would do this ONLY after you've got the above working perfectly.

5) Change all the filters (air, pre-fuel and main spin-on fuel filter) - no telling when they were changed last.

Do this first, post results.... there are many other simple steps to take, I'm sure others will jump in.

Good luck - let us know,
James
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1987 Mercedes 300SDL; SOLD
1985 Mercedes 300D; SOLD
2006 Honda Pilot - wife's ride; 122K;
1995 Toyota Land Cruiser - 3X locked; 182K
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