Adrian Jones wrote:
>
> John,
>
> Thanks for the message. I re-checked everything and things seem to be OK.
> The intake on #1 plug just starts to open at about 10 BTDC and the CB
> points start to open at about 10 BTDC. (Actually, I didn't have a test
> lamp so I used my $9.95 multimeter. When the points opened, the resistance
> went from 0 to about 5 ohms (and the rotor was pointing at # 1 plug tower.
> I was expecting it to go to infinite ohms when the points opened up, but
> I'll bet that has something to do with the condenser in the circuit.
> Anyway, I think it's safe to say the timing chain hasn't slipped.
> Incidentally, if folks haven't done this before, it's quite interesting to
> watch the valves go up and down, feel for the compression strokes, see the
> decrease in resistance (or light go out) when the CB points open up etc.
> Very useful diagnostic tool - do it when your car is running good so you'll
> know what the deal is.
> This weekend I'm planning on taking the muffler off and checking for broken
> plates, disassembling the distributor and re-checking the wires (again),
> running engine up to 3000 rpm then looking in fuel chambers for correct
> fuel level and just looking at the poor engine for inspiration. Then I'll
> order new carb stuff - needles, jets.
> To summarize: I've checked compression (150 +/- 5 on all cylinders),
> swapped distributors, distributor caps, plug leads, plugs, rotors, CB
> points, coils (3) New electronic fuel pump, checked float gap and Grose
> jets, cleaned and checked operation of SU carb pistons, disconnected choke,
> tried various fuel mixtures (raising and lowering of jets), put in a bottle
> of STP fuel treatment stuff, sprayed for air leaks around carbs, spacers,
> intake manifold. Checked oil in dampers, checked linkages (throttle and gas
> enrichment) between carbs are tight, checked carb butterflies turn 90
> degrees when gas pedal floored, took off air and fuel filters, examined
> carb needles. Checked fuel line between carbs. Checked dwell and
> ignition timing. Ensured timing is advanced when engine is revved. Tried
> advancing and retarding timing. Replaced low voltage wire from coil to
> distributor. Checked wires in distributor(s) for resistance when slack and
> when pulled. Checked valve clearances and examined motion with engine
> running. Tried cleaning up points in SU fuel pump. Checked leads to and
> from rev counter. Checked resistance of coil. Checked disributor is
> electrically grounded to engine, also ran jumper from distributor to engine
> Checked fluid in windscreen washer bottle. Have I missed anything?
>
> Time for a Guinness, Adrian
Well, haven't heard you mention use of a vacuum gauge. Try that and see
what the indications are.
--
*Bill Schooler *Check the MGCC Wash DC Centre Web Page
*Woodbridge, VA *http://members.aol.com/mgccwdcc/
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*69 B/GT, 53 TD *Web Page Coordinator
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