Question about paint chips in fuel system

[stouchton]

My boat is a 2004, so I have dealt with this - basically changed fuel regulator (3x) and fuel cell. But wouldn't this also effect the injectors?? I do not know much about my injectors, besides being over 20 years old. The engines are 4.3GXI-E. I do not know if these injectors have screens, or if paint chips could simply get to the nozzle/valve.

If paint chips can gather in the injectors, can they be cleaned?? Or should they just be replaced?

I am planning on pulling the injectors this winter and having them tested. I do not have any real issues, just down a little on power (3800rpm max instead of 4200/4400). When I had way too much fuel pressure I had no issues with power. Now that fuel pressure is corrected (55psi idle, 50psi 2000 rpm no load) got me thinking I may not be getting proper fuel delivery.

Pulling the injectors might be a difficult project - clearance is nil.

I appreciate any thoughts.

 

[Scott Danforth]

do a compression check.

yes injectors can be cleaned

if you can get the spark arrestor off, you can get the injectors off.

 

[stouchton]

do a compression check.

yes injectors can be cleaned

if you can get the spark arrestor off, you can get the injectors off.

Thank you

I can get the arrestor off, so should be good to go.

Good idea on compression check. Changed the plugs yesterday but forgot my compression gauge, but simple enough now that I finally found a decent spark plug socket that fits under my GLM manifolds.

 

[cyclops222]

EFI engines can ruin engines with lightly blocked injectors. They start to run some cylinders smoothly LEAN.

 

[ESGWheel]

Please read this thread (link) explains a lot....