From: mark@trivalley.com (Mark Shawver)
Date: Mon, 23 Sep 1996 16:48:35 +0100


SUPERCHARGER (Sebring-based units)

ROUGH IDLING/HESITATION:

Idle needle wanders excessively (200 +/- rpm)/flooring it hesitates then
takes off.

1. Vaccuum Hose connections (vaccuum leaks)

2. Fuel filter dirty (causes detonation at high speeds due to insufficient
        fuel pressure)

3. Auxiliary Fuel pressure regulator not functioning properly
        a. check pressure
        b. get a new one

4. Injectors dirty

DETONATION:

1. Spark plugs:
        a.  Split fire plugs...lose those. They burn too hot for
            supercharger applications.
        b.  Run NGK in a cooler plug (BEST)

2. Timing set too high
        a. Set timing to 6 degrees in Hot weather (90+) or in areas with
           reformulated gas or 92 octane or all three.
        b. 8 degrees in 93 octane areas or cooler temps (70 or below)

        note: to reduce timing let the timing "niche" fall to the right
        closer to the "T". To advance, let the tick fall to the left of the 10.

3. Hot Spots from radiator hoses
        a. Top radiator hose too close to intake pipe. Wrap hose in heat
           blanket (foil/gauze) temp fix. Buy the good stuff from a
           performance shop (i.e. header wrap)

4. Dirty Fuel Filter
        a. Change it every 20,000-30,000 miles

5. Detonation with A/C on high, warm days?
        a. Turn timing back. A/C puts a big load on the system, especially
           when flooring it. Most stock cars will ping a bit, so easy on
           the pedal if you drive with the A/C on.

EXCESSIVE BELT DUST IN ENGINE COMPARTMENT

1.  Belt too loose: tighten it up

2.  Belt not in alignment with pulleys

note: tightening the belt is a pain. I used a crowbar to lift the charger
unit up putting tension on the belt and had a friend tighten up the bolt.
BE CAREFUL THOUGH!

SQEALING BELT NOISE WHEN START UP OR TURNING

1. Belt too loose

note: Belts DO sqeal when wheel turned to limit

E-mail if you all have questions,

-Percy M. Chow
'91 LTLVPR