No Timing

dggt6 · Post by **dggt6** » Sat Jun 17, 2017 6:07 am

Thanks Lav1000,
after writing the last post I went out removed the rocker cover and spark plug and found that the exhaust valve was opening as the piston was coming UP and stayed open as the piston went down!
I thought I put the crankshaft back as I found it but it appears I did not, though the timing marks lined up.
I will whip of the timing cover and see what I can find.

Thanks again,
Doug

LAV1000 · Post by **LAV1000** » Sat Jun 17, 2017 9:00 am

Make sure you have the right OEM specs on this.
On some engines you have the situation that the outlet valve is stil open when the inlet valves opens.
There is a reason for this.
They use speed of the exhaust gas to suck the fresh air fuel mixture in.

kjones6039 · Post by **kjones6039** » Sat Jun 17, 2017 9:14 am

LAV1000 wrote:On some engines you have the situation that the outlet valve is stil open when the inlet valves opens.
There is a reason for this.

Just a little thing called "camshaft overlap"...................

Ken

LAV1000 · Post by **LAV1000** » Sat Jun 17, 2017 9:25 am

Your right Ken, and it is not so little.

It is a huge thing in tuning and exhaust systems.

kjones6039 · Post by **kjones6039** » Sat Jun 17, 2017 10:30 am

LAV1000 wrote:Your right Ken, and it is not so little.
It is a huge thing in tuning and exhaust systems.

Correct! I was just being facetious!

Ken

rickb794 · Post by **rickb794** » Sun Jun 18, 2017 8:01 am

If your cranking compression is good the cam timing can't be so far off it won't run.
Looking at where the intake valve closes is (a better guage) a little less of a grey area as this determines your dynamic compression.

The EDIS has complete control of your ignition, the EDIS will make sparks even with the MS unplugged.

Your no spark fault is with the EDIS or its supporting systems.

dggt6 · Post by **dggt6** » Sat Jun 24, 2017 5:31 am

SOLVED!!!

It was "the old EYE DEE 10 T " problem. More commonly known as the IDIOT symptom.

The cam and crank sprockets were aligned, but 180 degrees out (backwards?). I was pedantic about re-aligning the sprockets but totally forgot to check which part of the 4 stroke cycle the cam was on.

Thank you everyone for your assistance.

Now back to fitting the O/D gearbox installation project that started all this 7 months ago!!!!!!

LAV1000 · Post by **LAV1000** » Sat Jun 24, 2017 12:18 pm

Thanks for the feedback, we all make mistakes.
Thats why we know so much!

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