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nofire 3/4

  • Thread starter Thread starter monte
  • Start date Start date
M

monte

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new 1100 16v engine installed, 3/4 getting strong spark and gas but will not fire. 1/2 run ok. very weird because 3/4 are different coils. Any ideas?
 
carbs gummed up on that side? Not getting fuel? Slides not moving?
 
thanks cafekid, but carbs are fresh off my old engine which ran well.
plugs are wet on both cyls.
 
pulled the plugs to see if you get spark?? might have bad wires...yeah they're on different coils, but its an idea...battery strong? bad thoughts..valve stuck open? compression issue?
 
160 lb.s across the board. my spark tester shows hot spark on all the new plugs gapped at .028. rechecked carbs, no apparent problems.
 
Wild! I cant think of anything past that...timing?? noo..two seperate coils...man..have you tried swaping the plugs from two to three and one to four? they may not reach, but two and three should...

err that should be plug wires...not the plugs..

and you could try backing the gap off on those two just a bit..otwoeight is the wide side of the gap...
 
Last edited:
What are the carbs off of?
Maybe you're rich on the pilot circuit or the carbs aren't synced to the motor.
Is the battery good?
 
monte said:
new 1100 16v engine installed, 3/4 getting strong spark and gas but will not fire. 1/2 run ok. very weird because 3/4 are different coils. Any ideas?
Click to expand...

Take CLOSE LOOK to see whether you've inadvertently swapped 3 & 4 coil wires at the plugs. THIS will give the type of problem you're seeing with good carbs and the rest of the ignition in good condition and yet unaffect the paired plugs on the opposite side. Make sense?
 
drain plugs

drain plugs

unscrew the carb drain plugs of 3 and 4 to see if any fuel in coming thru/
 
You beat me to it SPARKSS. I had exactly that happen to my 550. Took me a week to work it out. It wasn't till I removed the tank and traced the individual wires to the plugs that I realised I must have put the leads on the wrong plugs. Good as gold once I swapped them back.
 
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