MS3x help with starting/cranking tune
#5
I agree, every now and then the crank spins backwards, which means its too retarded. This tune that I have likes the 80 degree days I have , so...how would that manifest in colder days, I know I have enough fuel as it indicates 12.5, but when I change the timing and it cranks well I get 19:1 which means its working. It doesnt turn on so..something still not right.
Heck, I'm back to the stock ecu, other than this mishap, using a Megasquirt is pretty easy. After I saw auto-tune work its magic I began to understand how to tune.
Heck, I'm back to the stock ecu, other than this mishap, using a Megasquirt is pretty easy. After I saw auto-tune work its magic I began to understand how to tune.
#6
Boost Czar
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it's impossible for the crank to spin backwards.
if it's combusting in bangs and not quite starting, or you need throttle in order for it to catch, you need to lower the crnaking pulsewidths in that CLT temp zone.
if it's combusting in bangs and not quite starting, or you need throttle in order for it to catch, you need to lower the crnaking pulsewidths in that CLT temp zone.
#7
My brother saw it spin backwards during cranking. Terrible terrible sounds. Ploof, plop, bang. Ever took an engine apart after this? I doubt visually I will be able to see this when I open the engine, but just wanted to know. Good thing I'm moving towards a 01 block.
As far as cranking goes, if I move timing one way it hardly seems like its going to fire. If I move timing the other way there's a sweet spot where it just doesnt catch, but spins nicely. And then there's the "i think this car has a carburator" zone where I think I'm choking it and tons of bangs go on.
As far as cranking goes, if I move timing one way it hardly seems like its going to fire. If I move timing the other way there's a sweet spot where it just doesnt catch, but spins nicely. And then there's the "i think this car has a carburator" zone where I think I'm choking it and tons of bangs go on.
#8
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I'm pretty sure that this actually can happen. If your timing is too advanced during cranking and you're cranking somewhat slowly, then you have combustible mix in the combustion chamber, the crank position is BEFORE TDC and when you get a spark it wants to go backwards. Cranking usually stops at that point. Causes the starter to sound pretty funny too!
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