linderpat

Just got my new injectors from Roger
Car is a k-jet, CIS set up. My injector system uses the hard lines.
Any gotchas before I dive in? I've done a search and couldn't find anything special to worry about.
What about things like running frst with the relay out to depressurize? Obviously must counter-hold nuts as they come apart. What else?

fraggle

I'd soak everything in PB overnight as a precaution before trying to undo and fittings. If you botch even one you'll be in tough shape.

Ducman82

ya, dont want to round of the the line nuts, thats for sure.

GlenL

Be prepared to use a vicegrips to remove the big sleeve from the runner. Supposedly you can unscrew it by wrenching the injector but it's probably too frozen for that and the sleeve with yield around the injector.

docmirror

This shows some service procedures that also apply to the 928. There is a good puller tool pictured.

http://www.birdmanferrari.com/servic...ctor_clean.htm

linderpat

what runner Glen? Now you have me worried. Are you thinking of the later configuration? Mine go right from the hard line to the injector, altho there may be something there I haven't seen yet until I start to take it apart.

linderpat

perfect - this is very helpful. Thanks.
Glen - mine are like the injectors in the link from doc.

GlenL

Right.

Look at the first pic in the doc. The large threaded sleeve should be unscrewed from the runner (legs) to replace the injector. Some people may pull them out and shove them back in but with 30+ yo rubber you want to be gentle.

linderpat

thank you.

Lizard928

the CIS injectors in our 928 are different.
our CIS injectors actually are threaded into the bung which is then threaded into the runner. Everything else applies.

linderpat

So just unscrew the injector or the whole bung from the runner?

GlenL

928 CIS injectors are like in the pictures on that link. The injector isn't threaded. It's the sleeve that unscrews. I'm not sure what Colin is describing.

Jadz928

Best trick I found is to unscrew the 3 part assy (injector, sleeve, and cmpression seal) as a whole, using a long nose socket. Then spray with pen. oil, rethread into intake runner (hand loose), then pull with hook tool.

Good talkin' with you Ed. Pls pm me your addy.

docmirror

The problem, as with all CIS setups is the slug which holds the seal in place needs to be unscrewed using the brass of the CIS injector. Soak it in PB for a bit, then extract the brass injector using the tool. Once the injector is out, use an Allen driver to remove the slug, and replace the injector seal below. The seal will likely come out in many pieces.

Try to get injectors which have very close opening pressures, otherwise the off-idle will be a bit lumpy(I have that problem with a CIS car now).

LT Texan

+1