bonus12

Now that I've driven a few hundred miles on the cleaned injectors, I can offer my review. First of all, I have a 1986 951 and I sent 'em to Mr. Injector. It was $16 bucks each, plus about $10 total for shipping. so, not a bad deal. Turn around time was 1 week.

I got them back and they were painted the original color. The flow rate of one improved by 7% and another by 4%. Right away I could tell the car ran better. Definitely, it was slightly but noticeably quicker. The idle became quieter with less "whirring." I'd say not bad!

If you want to try something out, send in your old injectors for cleaning. I used one place because it's good and cheap, but any place will do. My injectors do not appear in any of my records, so i had them cleaned, which was sort of a gamble because maybe they were fine. it turned out to be worth it, and i now see it as one big step closer to a great running engine.

Here is before/after flow testing.



Here are the cleaned injectors.

Ky944TurboNewbie

I used WitchHunter and learned that I had 1 leaky Turbo injector, and 2 that were mismatched. My Turbo had 2 correct injectors and 2 that were for a NA. I ended up with only one usable injector. I had the 2 NA injectors cleaned and if anyone is looking for an NA injector, I will sell them for $25 each shipped to continental US. PM me if you find you have a leaky injector that needs to be replaced.

Voith

I clean injectors like this




I have cleaned more than 100 injectors, and the difference before/after is very noticeable on 100.000km+ cars. Approx. 0.5/1L less fuel per 100km of fuel and better low/mid rev response.

odurandina

my injectors are cooking with 190 k miles.

change your damn fuel filter ever 20/25 k mile.

bonus12

I forgot to mention that the ac compressor squeal got much quieter, for some reason. Kinda odd but it was awesome.

Red1

In the old days we'd run a gallon of Xylene, 3 gallons of 93, and a couple WFO runs at 3AM to clean the injectors out.

gtroth

WitchHuntering smoothed-out my idle some.

Lizard944

I'm not a big fan of sending off 20+ y/o injectors to be cleaned, given the fact that you can buy new ones for approx $50 more than the cleaning. I had a misdiagnosis after a cleaning where the post cleaning report said all were good. This caused me to spend unnecessary time chasing down a hesitation and stumble after relying on the report to be accurate and ruling out the injectors as being the problem. It turned out to be a malfunctioning injector diagnosed by me checking the cylinder exhaust manifold temperatures with an infrared thermometer. The cooler cylinder was the defective injector.