1974 Porsche 911 coupe: Bosch Mechanical Fuel Injector Test and Cleaning [4K] Ep119

This video has been in the works for 8+ years and today I will solve a long time issue. I have never been able to really clean up mechanical fuel injectors and make them work well over time. They always seem to clog back up. I will use an ultrasonic tank and some berrymans B12 and see if we can clean them up. I will then flow test them to see if they got better, but they do not get any better over time. They start flowing worse until they clog completely. I will discover the magic solution to this problem. I realize that they are $40-$50 each, but I would like to save that $300 on a set to spend on something else for my car.

0:00 Intro
0:23 Planning to clean up these injectors
1:46 Injectors I will be cleaning
2:33 Ultrasonic cleaner and injector tester
3:43 Clean all injectors in Berrymans B12 for 2 hours
4:18 Test clean fuel injector #1
5:31 Test clean fuel injector #2
6:09 Test clean fuel injector #3
6:52 Test clean fuel injector #4
7:23 Test clean fuel injector #5
8:08 Reclean clogged fuel injectors
8:17 Berrymans B12 is not working in the ultrasonic tank
8:39 Soak in Berrymans B12 for another 24 hours and retest
10:39 What inside is making this happen?
11:05 Using acid to destroy contaminants
11:32 Cycle HCL through open pintle valve
12:21 Rinse, run test fluid through open pintle
13:08 Remove horseshoe and retest for flow
13:29 How an injector is supposed to flow on the tester
14:29 Rinse injector with WD 40 for storage
15:18 I finally figure out how to clean these!
16:46 Bonus different type of injector before and after

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