[phaques]

Anybody have a place you like and recommend to send my injectors out to?

[Jase007]

Ivan Arzola at IMA has a full Bosch F.I. tester / cleaner setup.

Merrifield, VA.

Search on here and you'll see several examples of his work ... particularly for electronic FI injectors [911 carerra up, 944 up] which are more involved than the mechanical pop injectors on the CIS cars.

FWIW: I went through my CIS several years ago and simply:

1. new accumulator
2. new fuel filter
3. new injectors
4. got new injector sleeves and outer sleeve O-rings - didn't install ... yet.
5. New $$$$ fuel pump
6. flushed tank, was OK.

[Rick Lee]

Ivan did my 993 injectors too. I spent about $1000 tracking down the problem and $160 on cleaning the injectors, which fixed the problem.

[phaques]

I think I may have found a possible solution...I pulled the distributor cap, just to be sure, and the end of the rotor is a grey, charred stub with no portion of the metal contact visible at all...flakes of the plastic rotor head are sitting in the distributor, and the contacts on the cap are heavily worn....maybe this is it all along? I've got new cap and rotor coming in tomorrow, and my fingers are crossed...

[Rick Lee]

That's kinda weird. I changed the cap and rotor when I did plug wires, probably in Dec. '04.

[cmartin]

Check for play in the distributor bearing. Mark it before you pull it, then try to wiggle the shaft inside the housing.

[phaques]

Replaced the dist cap and rotor, which enabled me to start the car, but the rough running, backfiring, and falling off of power under load are still there....

I pulled all the injectors out of their ports and placed them, still attached to the fuel lines, into separate mason jars, jumped the fuel pump relay, and ran fuel through each injector to compare flow rates....#'s 4 and 5 look to be about 10% less than the rest.

I discovered that just about any good diesel engine shop will have bench injector cleaning machine that will clean and test these injectors. the local shop that I dropped mine off with today is going to charge me $50 to clean and test mine. I'll let you know how this pans out....

Also spoke with a helpful local old german mechanic (yes, the mechanic is german and he works on german cars too...lots of Mercedes and Volvos with this same CIS system) who said to pull the fuel lines where they connect to the fuel distributor and fish out the small screens that sit in each port on the distributor and inspect/clean them...

I'll keep you all posted...

Another tidbit - EuroEast seems to have a good price on new injectors - about $39 each.

Rick - you did replace the rotor and cap in 12/04, but they've got about 20K on them since then...and as you know, those ain't highway cruisin' miles, neither.

[phaques]

The Final Resolution...
CMartin was closest to big money...
After taking it to a local mechanic, he found that a small screw on top of the distributor shaft had worked itself loose, and the shaft had become loose enough to chew itself all up. No spark. Voila. Nothing to do with fuel whatsoever. Oh well - now I have a clean gas tank, new pump, clean fuel lines and injectors.....

[HoodPin]

Originally Posted by phaques

The Final Resolution...
CMartin was closest to big money...
After taking it to a local mechanic, he found that a small screw on top of the distributor shaft had worked itself loose, and the shaft had become loose enough to chew itself all up. No spark. Voila. Nothing to do with fuel whatsoever. Oh well - now I have a clean gas tank, new pump, clean fuel lines and injectors.....

Wow....talk about your magical mystery tour...

Glad to hear you were able to resolve the problem, albeit the long way around...But it sounds like the car is ready for another 25 years of abuse.

[OldTee]

You have a head. Take small wooden hammer and bang away on it a few times. You earned it.
ARF