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Old 04-18-2004, 05:06 PM
Hatterasguy's Avatar
Join Date: Nov 2002
Location: Milford, CT
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Marshall Booth when I cleaned out my intake manifold my SDL felt a lot better. It seemed to spool up faster and pull harder. Although I did also change injectors, and fuel filters at the same time so it's hard to tell if it made the difference. But cleaning it sure made me feel better!
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Old 04-18-2004, 05:33 PM
Marshall Booth
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when I cleaned out my intake manifold my SDL felt a lot better.
When I cleaned out mine - things felt a lot better too, but the measurements were IDENTICAL. It's akin to the placebo effect ;-)! I have NEVER seen any measurement that showed any change. Most people change several things and don't take a before and after measurement, but when those niceties are followed - THERE IS LIKELY TO BE LITTLE OR NO DIFFERENCE unless the intake manifold ia more than 50% full! Every measurement I've seen supports that (and I have received almost a dozen reports where careful measurments were made and I've done it twice myself).

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Old 04-18-2004, 06:35 PM
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Join Date: Jan 2003
Location: Miami
Posts: 2,133
Marshall, thanks for the links youy provided, they were very helpful.

I adjusted the throttle presure cable as stated in the article as well as adjusting the modulator 1 turn clockwise.

I took it for a ride and the shifts are much shorter, more to my liking although I will tinker with them to try and get it better.

I do not have any tools to check the vacuum so I did the other two.

I really need to address my rear end clunking issue to really get the kinks out. I have some play in either the hal axles or diff that is causing an annoying clunk during shifting, especially in between gears when letting up on the throttle.

Oh well, at least I figured out how to adjust the tranny.

BTW, I did 0-62 in the aforementioned 13 seconds and it's right there. I need to get someone to ride with me to be more accurate.
Enough about me, how are you doing?
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Old 04-18-2004, 10:41 PM
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Join Date: Oct 2001
Location: around Charlotte NC
Posts: 576
no difference on intake cleaning


I did mine last summer (in the 250K range). There was about an 1/8"+/- lining of crud, but no where near what has been posting on the TDI pictures. This was in the main intake cavity and in most of the intake runners. It cleaned out pretty well with a spray "intake manifold cleaner" from either STP or GUNK. No performance difference noted. The new gasket did solve a small leak I had in the intake / head junction for #6.

As a reference, my car uses / leaks about 1 quart per 4500-5000 miles. Other cars with a greater oil consumption may be more clogged.

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Old 04-20-2004, 11:14 AM
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Join Date: Jan 2003
Location: Miami
Posts: 2,133
Good news and bad news on the SDL....

I got it back as earlier discussed and it ran like a scalded dog, albeit while leaving a cloud of black smoke, so I brought it back.

In trying to correctly set the timingon my my IP, my indy cracked it and will have to replace it.

For free of course.

He has a rebuilt one that he will be installing tomorrow.

To further respond on the tranny adjustment, I have adjusted it a bit further and it is shifting a lot better. The 1st to 2nd shift is fine, nice and smooth. THe 2nd to 3rd shift appears to be flaring slightly and the remaining 2 shifts are fine.

I told my indy how I did it and he was impressed that this info was readily available.

Any suggestions on the 2-3 shift?

Enough about me, how are you doing?
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