fuel pressure and injector checking (99 S70 T5)

t5ftw · Post by **t5ftw** » 26 Sep 2010, 18:53

I am trying to see if my fuel system is causing high long term fuel trim problem I have. Mine is 99 S70 T5 with 97000 miles on it.
I need to know whether my fuel injector resistance is within spec.
Ohm meter results are 13.0, 12.8, 12.8, 12.7, and 12.6 for injector 1, 2, 3, 4, and 5 respectively. Are these normal values?
Also, my fuel pressure at schrader valve at the end of fuel rail is 56.5 psi while idling.
The fuel pressure spec I could find was 54-57psi which is much higher than that of 850 (which I believe 40-45psi). According to this spec, my pressure is OK, but I want to make sure it is.
If my fuel pressure is OK, does it mean that my fuel pressure damper is ok too? I don't see anything leaking out around injectors or fuel pressure damper. My fuel pressure damper does not have vacuum line attached, and I believe there is no return line.

I also looking to see if there is any vacuum leak. So far, I could not locate any. But I found a line which I am not sure if it is a vacuum line or a electric cable. Can anyone identify what this line is in the picture? It is under the air box and above the transmission. Is it true that my model has no SAS, air pump, and EGR?

t5ftw · Post by **t5ftw** » 26 Sep 2010, 23:02

Someone said the cable is shifter cable. So, it has nothing to do with vacuum.
I found the spec for my injector Bosch 280-155-830. It's 12 Ohm.
Then, my next question is if my injectors are all 13 Ohms, will it affect long term fuel trim and how much?