89 190E 2.6 Need to do a fuel pressure test How is it done ? and what psi am I looking for ?

Among others Harbour Freight.com carries a low price CIS fuel testing kit.
A pre requisite to testingfuel pressures
mak

I found a test gauge/hose/valve kit on Ebay for a good price (under $30 as I remember). Basically you have to hook to the top and bottom chamber fittings on the fuel distributor, and have a switchover valve system to the gauge. Do a search here, but my memory says the pressures are about 75 PSI, with one chamber being about 5 PSI lower than the other - this is the critical measurement, the deltas between the upper/lower chambers. This controls the fuel flow to the injectors. There are some very definitive articles in the archives here on the procedure.

DG

I made a tester as far as I can see there only one port to plug the tester in to it next to the main line coming in to the fuel dist, ok got a reading of 60 psi Key on motor not running drop to 4o psi as soon as the key is off one hour later it zero confused:

Some of those rigs have chk valves for american iron. You might have to take it out.

If you want to adjust the EHA.. it will depend on gauge accuracy.

I think the line I was thinking is the main was the return line it the line to the pressure regulator I plug my gauge in next to that