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Engine blow-back?
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Stuggi
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Location: Jakobstad, Finland
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PostPosted: Tue Feb 19, 2008 2:41 pm    Post subject: Engine blow-back? Reply with quote

I made this small video for engine sound reference, watch what happens when I pull the throttle the first time.

http://www.youtube.com/watch?v=DQvT48d1aDU

The car's exhaust vent from not visible to whiteish smoke, it was sub zero centigrades outside though.

Any thoughts? The carb is a PICT30, the dist. is a 009, the timing, dwell, carb and idle has been set (by a first time noob, but still). The valves haven't been adjusted though.
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PhotoAaron
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PostPosted: Tue Feb 19, 2008 5:38 pm    Post subject: Reply with quote

Looks like you are not getting enough squirt from your accel pump. Could just be a clogged squirt jet or maybe an adjustment to the accel linkage or you might need a new diaphram.

To confirm, take the filter off, pull back the choke, and look down the carb to see if you have a healthy squirt......with engine off but a full float bowl.
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mailman
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PostPosted: Tue Feb 19, 2008 5:55 pm    Post subject: Reply with quote

Seemed to me as though it popped back through the carb when you pulled on the throttle the first time. Makes me wonder about two things; valve adjustment and ignition timing. Adjust the valves first, then set the timing. See if that helps....
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Stuggi
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PostPosted: Wed Feb 20, 2008 5:04 am    Post subject: Reply with quote

Yeah, since I haven't adjusted the valves yet, that might be a really good idea. When I get my front brakes back together, I'll jack up the rear and try to get some work done there.
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