I am currently having problems with my '93 at part throttle. As part of the repairs, I had my injectors cleaned at Fuel Injection Specialties. They flowed the units before and after cleaning to see the difference. It was very worth the $170 I paid. I would recommend anyone with 50k miles or more on theirs to have them cleaned.
Here's the data:
Open flow (20 seconds)
Before After
1 - 100 ml 100 ml
2 - 100 ml 100 ml
3 - 97 ml 99 ml
4 - 96 ml 99 ml
5 - 95 ml 99 ml
6 - 98 ml 100 ml
7 - 100 ml 100 ml
8 - 104 ml 101 ml
Pulsed Flow ( 60 secs, 720 RPM)
Before After
1 - 90 ml 90 ml
2 - 92 ml 90 ml
3 - 92 ml 90 ml
4 - 90 ml 88 ml
5 - 86 ml 88 ml
6 - 87 ml 89 ml
7 - 87 ml 91 ml
8 - 92 ml 90 ml