5 of the 6 injectors have pretty good access. I did most with a regular allen wrench but a short stubby would have been handy or best would be a ball allen. You can probably reuse the insulators but might as well change them and you'll need both new insulator O rings and new injector seals. Flare wrenches are handy. I also just changed the fuel filter. The insulators with new O rings are a tight fit. I tapped them in with a 15mm socket. Oil liberally around the new O ring with fresh oil. Take care when pulling out the old insulator. There will be a lot of dirt and grit there stopped by the O ring. Liberally oil the shaft of the new injector before you press it into the new seal. What I did was to hold the new insulator, insert the new seal into the insulator, oil up the new injector and press it in. Make sure the injector is correctly seated into the seal and then pull it and the injector back out of the insulator. Put the new O ring on the insulator and press into the block and then plug in your new injector w/seal.

I bought a new cold start valve gasket. It is just a piece of stiff paper.

The new injectors did not fix my stumble start but the car does run even smoother and throttle response seems to be crisper.

If you have and tips concerning the cold start valve, let me know. That is my next step.

Thanks,

glenmore
1991 300CE
2000 C280
1990 LS400

Very good write-up:
http://www.peachparts.com/shopforum/showthread.php?t=159346

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joel

Prayers bring forth enlightenment.

Another post suggested bleeding fuel through the distributor by taking the metal pipes one by one.

Anybody tried this with success?

__________________
joel

Prayers bring forth enlightenment.