924Board.org

rcarson25 · Joined: 14 Dec 2020 Posts: 45 Location: Middle TN

I am continuing to work through issues trying to resurrect my 1981 Turbo that has sat for almost a decade. Everything is together and the car starts but it wants to idle very rough around 500rpm. I have done a compression test and all looks good there, and now I am looking to get a baseline fuel pressure set. I don’t have a CIS tester with valve but my tester does have a banjo fitting that I hooked up to the top port of the fuel distributor. I figure hooked up this way I should see control pressure? If so what should I be seeing for control pressure? Currently I am getting about 6.5 bar.
Are there any other fuel pressure test I can/should run with my standard fuel pressure gauge?
Sorry for not having a picture but I don’t have a good way to add them to this forum since I don’t have a hosting site to create a url.

Rasta Monsta · Joined: 12 Jul 2006 Posts: 11723 Location: PacNW

Proper CIS tester is worth the investment. Also recommend having your intake smoke tested for leaks, and your injectors professionally serviced.
_________________
Toofah King Bad

WeiBe (1987 924S 2.5t) - 931 S3

rcarson25 · Joined: 14 Dec 2020 Posts: 45 Location: Middle TN

I would like to not have to buy another $150 plus specialty tool I will probably only use a handful of times if I can avoid it. Really hoping that I can get some info based on what I have.

Smoke test is a good idea, I will be sure to do that. I have replaced the injectors with new ones, so those should be good to go.

Fasteddie313 · Joined: 29 Sep 2013 Posts: 2596 Location: MI

Putting a fuel pressure tester just on the top port, having disconnected the WUR, you will see system pressure..

If you buy a tester it will easily resell here when you are done with it..
_________________
80 Turbo - Slightly Modified

rcarson25 · Joined: 14 Dec 2020 Posts: 45 Location: Middle TN

Point taken, is there one that would be recommended?