94 dak 3.9L What is the correct pressure? What tool does one use on that Schrader valve? I have the Harbor Freight kit which does not have a schrader valve capable attachment. It's actually quite useless as it comes.

 

The Harbor Freight kit I have, purchased about five years ago, did have a Schrader valve compatible fitting. However, you can rent one from Autozone or O'Reilly's (and possibly other chains!) for a net of $0 (you pay the deposit, you get it all back)

To answer your question, for 1995, it's 35-45 PSI. No, I haven't scarfed up a 1994 book, but the fuel pump assembly interchanges for 1994 and 1995, so I'd think the pressures should be the same (since the regulator is part of the fuel pump assembly.)

RwP

 

I agree with your reasoning on the pressure. I'm trying to eliminate the excuses folks who claim to have experience with these motors are giving me. I get the feeling they want me to spend money instead of help me and make a long term customer. I looked up the HF kit and they have a Master fuel injection pressure test kit. That's not the one I have. It will cost me as much to buy it as pay someone to test it. I don't think this is my issue but if I don't eliminate it..... I still suspect that it is the fuel sync is causing me engine trouble. Do you know if the SnapOn MT2500 or Solus can do a fuel injector sync? If so How does one use it to do what the DRBIII calls the 'set sync' function?

 

Well, rather than buy that master set, I'd lease a set from O'Reilly, AutoZone, or Advance Auto - there's probably a chain that does that where you live.

As to the others, sorry, my 3.9 is a "bear skins and stone knives" variant (i.e., dizzy with a reluctor to fire the plugs, no cam or crank sensor.)

RwP

 

I got a gauge and it is at 37-40 PSI holds steady as I rev it. Now if only I could find out about what OTC scanner will do an injector Sync.