After discussing this with some co-workers today, it was suggested that I try pulling a vacuum on the FPR to see it was good or bad.

Since my wife had been driving the car today and it was still very warm, I decided to get this done before the rain came. Upon removing the vacuum line to the FPR I no longer had a clicking noise at the FPR. Interesting. I attached the vacuum pump and pulled the fuel pressure down from 44 to 38 and it held very nicely.

I did some research and found that the vacuum line goes to the front of the car and is controlled by this part:

https://www.fcpeuro.com/products/volvo-vapor-canister-purge-solenoid-c70-s70-v70-8627005

After I found it, I went out side and I was no longer getting any type of pulsation from it. I also tried pulling a vacuum at the line and I could not, so I must have a break somewhere as well, which now needs to be found. Ugh!

I've placed the vapor canister purge solenoid in my freezer for a while to see if the solenoid at least works. My thought is that it will, but when it gets warm it no longer will, therefore needs to be replaced.

Yea for me.

Problem solved, finally!!

Matt
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1989 - 245, 1990 - 245, 1991 - 245, and 1993 - 245