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Fri Nov 14, 2008 10:09 pm

While rebuilding my '70 FI engine, I left the fuel injectors in the back of my SB. With the engine out, that left a big hole for Mud dauber wasps to fly in and build their nests in the fuel intake part of the injector.

For those of you that don't know, Mud dauber's are wasps that build individual nests out of columns of mud. They lay a single egg in each column and the young wasp then digs his way out of the mud when mature.

Each injector was completely plugged with dried mud and although I was successful in digging it out, I'm sure that some is blocking the screen in the injector at the bottom of the rubber inlet hose.

Any suggestions as to how I can clear it? My budget can't handle 4 new injectors.

Fri Nov 14, 2008 11:18 pm

let it soak in carb cleaner for like an hour then scrub as much as your can

Sat Nov 15, 2008 8:34 am

OGSquare wrote: While rebuilding my '70 FI engine, I left the fuel injectors in the back of my SB. With the engine out, that left a big hole for Mud dauber wasps to fly in and build their nests in the fuel intake part of the injector.

For those of you that don't know, Mud dauber's are wasps that build individual nests out of columns of mud. They lay a single egg in each column and the young wasp then digs his way out of the mud when mature.

Each injector was completely plugged with dried mud and although I was successful in digging it out, I'm sure that some is blocking the screen in the injector at the bottom of the rubber inlet hose.

Any suggestions as to how I can clear it? My budget can't handle 4 new injectors.

Water maybe? (I don't know if it's ok to soak injectors in water) but carb cleaner doesnt penetrate dust, my own experience.

Jack

Sat Nov 15, 2008 8:50 am

Keep water away from the injectors. It is their mortal enemy.
Carb cleaner would probably be the best.

Sat Nov 15, 2008 9:42 am

Use one of those cans of spray carb cleaner (with the tube), so you can get all the way to the bottom (at the screen). You might want to remove the short hoses off the injectors as well, since they might be old enough to cause leaks or be cracked. You are replacing the rest of the fuel hoses on the car? You should since the system is dry right now, and it's cheap insurance against leaks.

Sat Nov 15, 2008 10:33 am

And if you are going to use a pressurized carb cleaner then also wear a face shield -- safety glasses at a minimum. Protect your peepers!