No.1 CHT and EGT lagging and low

[Flyin'Bryan]

I just had an interesting conversation a few days ago with an RV-7A owner with a fuel injected Superior Engine. He told me a story about how he was on a cross country with another RV pilot with the same engine and the same amount of fuel on departure. When they stopped to refuel he discovered that had to put in about 9 more gallons of fuel than the other pilot, and he could not figure out why.

The investigation later revealed that a sleeve on one of the injectors was missing, and was allowing much larger quantities of fuel into that cylinder as a result. Apparently it was missed during assembly of the injectors. Not saying that is your specific problem, but perhaps this is something else to consider......

[Derek]

Originally Posted by BobTurner

This is sometimes called the coke bottle test. Loosen all tubing clamps, remove injector #1 and at least one other, direct injectors into clear containers like coke bottles. Mixture full forward, turn on electric fuel pump until easy to see fuel is collected. Compare bottles, does bottle #1 have more gas than others?

The test sounds simple enough, I'll give it a go.

[Derek]

Originally Posted by Flyin'Bryan

I just had an interesting conversation a few days ago with an RV-7A owner with a fuel injected Superior Engine. He told me a story about how he was on a cross country with another RV pilot with the same engine and the same amount of fuel on departure. When they stopped to refuel he discovered that had to put in about 9 more gallons of fuel than the other pilot, and he could not figure out why.

The investigation later revealed that a sleeve on one of the injectors was missing, and was allowing much larger quantities of fuel into that cylinder as a result. Apparently it was missed during assembly of the injectors. Not saying that is your specific problem, but perhaps this is something else to consider......

Sounds like a simple check, I can do this at the same time Im checking the fuel flow.