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post #1 of (permalink) Old 08-16-2000, 11:56 AM Thread Starter
 
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trivial timing

Man,my sammi backfires no matter where I adjust my timing.Ive tried 10 degrees @ 800 rpms like it has under the hood(ran like its on its last breathe)and Ive tried 0 degrees at about a thousand rpm.What is the most common setting seeing how the hood and the shop manual just isnt doing it?Is this some voodoo thing thats only happened to mine?

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post #2 of (permalink) Old 08-16-2000, 12:02 PM
 
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Re: trivial timing

Did you remove your distributor? you might have it 180 deg. out. Quite possibly you might also have a sticking or burnt valve. Is it backfiring out of the exh or intake side? I'm assuming it is not fuel infected. Was the timing belt changed recently, if not it might have slipped a tooth.

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post #3 of (permalink) Old 08-16-2000, 12:47 PM Thread Starter
 
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Re: trivial timing

Yea,I did put a new distributor in,but I put it back in exactly the way it was removed.And the burnt valve thing...maybe i do because it does burn oil and puffs out black smoke,but not bad.Ill run that engine till the hogs go to bed (southern thing)if itll last that long.

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post #4 of (permalink) Old 08-16-2000, 03:18 PM
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Re: trivial timing

have you checked your vacuum advance? When you timed it did you pull the vac advance off and plug the line?
Sounds like you should do a compression test , should be in the 180-200 range min 175 I think. all cylinders with in
a few psi of each other. if you have a low one squirt oil in it and see if the compression goes up. if it does then rings, if not then its the head/valves. make sure you have no blockage in the air intakes. (Try running with the
intake line off the airbox for a bit and see if it helps. )
good luck.

Glenn Loud
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post #5 of (permalink) Old 08-16-2000, 04:21 PM Thread Starter
 
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Re: trivial timing

Yea,vaccum advance comes with a new dist. Whats the consequeces of running with a burnt or sticking valve if in fact i have one?Also,did a comp check and each cyl blows about 169,170 psi.

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post #6 of (permalink) Old 08-16-2000, 06:39 PM
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Re: trivial timing

is it really a back fire or a bad hesitation? How is your EGR valve? Operational? Stuck open? make sure your cat con isn't clogged.

Glenn Loud
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post #7 of (permalink) Old 08-16-2000, 06:50 PM
 
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Re: trivial timing

find top dead center set your distributor to #1 plug wire
set your valves. then retime your motor. according to my suzuki manual 170 is min. compression per cylinder but its
affected by valve setting- engine should be warm and choke
wide open. i would check the egr valve also if you still
have problems.

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post #8 of (permalink) Old 08-16-2000, 08:45 PM
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Re: trivial timing

forgive the stupid question, but you tested at 10 degrees before tdc, not after tdc, right?

post #9 of (permalink) Old 08-17-2000, 02:58 PM Thread Starter
 
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Re: trivial timing

Didnt think i had to find tdc again if I didnt turn the engine over with the distributor out.Anyway,I can get an engine for 300$ from this engine shop whos going out of business,Im probably gonna hook up with him.Besides,my engine now burns a quart a week!

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