Hi to the great and the good of the forum
I have an IO- 320B1A in my RV 6A which has been suffering from a lumpy idle when hot , to cut a long story short the injector body ,distribution valve and nozzles have all been bench tested and are good , the mags have been bench tested and are also good . We got the engine running pretty good but the idle mixture adjustment wheel was almost at full travel in the rich direction .
After adding some additional heat shielding to the fuel system I then disconnected the mixture link and cantered the thumb wheel but keeping the overall length .
So now it all goes wrong on starting the engine pops and bangs and will not idle fuel flow and manifold pressure about 2gal hr and manifold press a bit 13 “
After adjusting the mixture we had more popping and banging and at some point during this fuel flow jumped to 6 gal hr and manifold press 22”
As I understand it this is indicative of an induction leak , initial visual check of the induction tubes ans connector sleeves all look ok .
Plan is to check for induction leak using the compression tester method and soapy bubbles .
Is there anything else I can check or something that may have produced these symptoms
Thanks in advance for any assistance
Mark
I have an IO- 320B1A in my RV 6A which has been suffering from a lumpy idle when hot , to cut a long story short the injector body ,distribution valve and nozzles have all been bench tested and are good , the mags have been bench tested and are also good . We got the engine running pretty good but the idle mixture adjustment wheel was almost at full travel in the rich direction .
After adding some additional heat shielding to the fuel system I then disconnected the mixture link and cantered the thumb wheel but keeping the overall length .
So now it all goes wrong on starting the engine pops and bangs and will not idle fuel flow and manifold pressure about 2gal hr and manifold press a bit 13 “
After adjusting the mixture we had more popping and banging and at some point during this fuel flow jumped to 6 gal hr and manifold press 22”
As I understand it this is indicative of an induction leak , initial visual check of the induction tubes ans connector sleeves all look ok .
Plan is to check for induction leak using the compression tester method and soapy bubbles .
Is there anything else I can check or something that may have produced these symptoms
Thanks in advance for any assistance
Mark