Boost and TDC and distributors

Mon Jun 24 11:52:18 EDT 2002

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I'm not with this at all Benie.  More specifically, if Dan removed the
protective  pop rivet, the ONLY thing that could have put it out of reference
would be a bad lifter R&R or timing chain R&R/wear.  Bottom line, if the
distributor was never removed, only the cam could be  out of phase with the
flywheel.  Reading Dans original post, he had to cut the rivet AFTER finding
tdc on distributor/flywheel.

Dan to do this correctly:  Find tdc in the flywheel, remove the cover on the
cam (that requires removing ONLY the hydraulic pump belt) make sure the
reference dot/hash lines up with the pointer on the back of the cover..  Then
look at the distributor to make sure it's hash marks line up.  Once this is
done, rotate the flywheel 2 turns an realign the TDC reference marks.  Done

Bernie:  The distributor in the turbo cars is a single window type.  The
distributor reference signal/flywheel reference signal is verified ONLY on
startup, after which the distributor reference signal is ignored, and the car
operates on rpm and flywheel only (per Mike's post).

My bet:  The car needs a timing belt/adj, a new cam chain, cams are out of
phase, and/or a new distributor (too much slop).  OR the cam to flywheel tdc
timing *still* isn't correct.


Scott Justusson
QSHIPQ Performance Tuning

In a message dated 6/23/02 5:39:44 PM Central Daylight Time,
b.m.benz at writes:

Thanks for the correction, Mike.

Assuming that you are correct and I have no reason to doubt you, inasmuch as
I've not had to delve into it as yet, that the Hall sensor produces one
pulse per cycle, Then it is reasonable that the ECU uses this to select the
comp stroke TDC and then could/may very well switch to the speed sensor
pulse train for timeing thereafter.  A different system than I envisioned,
but this difference does not change the rational for Dan's proven ability to
run with the dist assy, rotor and housing, rotated 180 degrees from its
normal oriention on the engine.

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