Help...one last try

[majicwrench]

TEST. "T" in pressue gauge ( CS vavle is good spot), turn key on, read pressure. What is it?? OK, or extreme??. Pinch return line, see if pressure goes up ( it should). If it does line is OK.
Measuring ohms and volts is fine, but this thing is not off an ohm or two. Put meter away. Pull a plug. Is it wet or dry?? Lay it on head..does it spark?? If it sparks and is dry, piss some fuel in cylinders, put plugs in, turn key. Did it fire?? If plug is soaked, unplug injectors, put plug back in and hold pedal down and crank. Did it fire??
Good luck,
Keith

[maytag]

Hey, your comment here made me scratch my head and wonder about my own issue, but I didn't want to hijack Divers' thread.
I have my IDF's setup with a holley fuel regulator sitting between them, and the pressure gauge on the other end of one carb. So, effectively dead-headed.
Does that mean that my 2.5-3lbs I'm reading is likely incorrect?

Why are changing the line?? You are guessing and assuming and that is your problem. Change the line if it is plugged. Quit guessing. Test.
Without diggin back thru old posts on this, didn't BEEK get it running??
As has been mentioned if you are dead heading the pump it will show way high. The regulator may, or may not, be able to deal with that much pressure. But the ## that really matters is to "T" into the pressure side of things and see if it is reasonable----38lbs etc.
Keith

[maytag]

Hey, your comment here made me scratch my head and wonder about my own issue, but I didn't want to hijack Divers' thread.
I have my IDF's setup with a holley fuel regulator sitting between them, and the pressure gauge on the other end of one carb. So, effectively dead-headed.
Does that mean that my 2.5-3lbs I'm reading is likely incorrect?

my ign doesn't care about 1 or 4, waste spark fires both cylinders so just set it up on 12btdc. You can't accurately measure fuel pressure by dead heading the pump, it has to be tee'd into the line. Are the spark plugs wet?

[majicwrench]

Maytag,
Not clear on your set-up, but "dead-head' refer to having no way for the fuel to return. If your return line is still hooked up it is not dead-headed. Hope that is clear as mud
Keith

[Divers]

Ok...ran all new return line this evening...hooked up gauge inline. Pressure reading is zero. Pulled a plug...dry as a bone. Does this mean regulator?

Kinda pissed since I set these to okiinjectors for cleaning and ASSUMED they would check the regulator.

Guidance?

[maytag]

I know nearly nothing about the FI on these cars. But check to see you've got fuel going INTO the regulator.

And I'll start a new thread for my question.

[Divers]

Yes...pressure into fuel rail.

[majicwrench]

Hooked gauge inline to what?? Return line?? It SHOULD read zero. Feed line?? It SHOULD read 38psi or so. AN injector shop is not going to check the regulator.
Keith

[bradartigue]

I'm going to have to say that you can test the thing to death but you've got to stop and understand the system. It sounds like you're attacking things without an understanding of how the whole system works, replacing individual parts, sending stuff off. You're going to go nuts.

I'll gladly email the Bosch L-Jetronic introduction booklet (from Bosch, not FIAT) as well as FIAT's diagnostic guide. Shoot me an email.

Here is the pressure test procedure from a Bosch/FIAT FI booklet.

You can use a commonly available fuel injection test kit to test fuel system pressures. To do so you connect the test kit to the cold start valve fuel line. With the pressure regulator vacuum line disconnected the fuel feed pressure should read 2.8-3.2 bar (39-45 psi).

If the pressure is out of range:

1. Disconnect fuel return from the fuel pressure regulator.
2. Connect a fuel hose to the regulator with the opposing end in a glass jar.
3. Operate the starter and check gauge.
4. Reconnect return line.
5. Determine:
• If the pressure is too high, replace the regulator.
• If the pressure is in specification, inspect the return hose and line for blockage.
• If the pressure is too low, pinch return line. If pressure increases, replace the regulator; if it remains constant inspect the input lines for blockage; if blockage does not exist, replace fuel pump.
• If gauge shows no pressure, check that the fuel pump is running; if it is, inspect the input lines for blockage; if blockage does not exist, replace fuel pump.

[Divers]

How could such a nice engine be causing me so much grief

Brad, it will be impossible for me to follow the fuel injection troubleshooting guide because as you have pointed out a couple times, I am not using a Bosch fuel pump so I would fail step #1 (pressure). Maybe I can follow the "spirit" of the guide? As far as replacing parts ad hoc. I do not believe that I have done this (except the dual relay). The injectors were sent out due to 30+ years old. The fuel lines were replaced due to 30+ years of use. If I choose to replace the regulator it would be under the same theory. I believe you pointed out that even Bosch parts have a life expectancy and 30+ years is pushing it I really do value your input. Some of the things I have done recently were actually oversights on my part when restoring the car (like ALL the fuel hoses in the system (including vent lines).

[Divers]

...and before the flaming starts....yes I was tired last night and now realize I put the fuel pressure gauge in the wrong place!

R

[4uall]

I think I have it! The reason for all the issues is because your blues are non-matching

[bradartigue]

NOTICE (ATTENZIONE!): In light of being criticized for harshness this message has been replaced with the following serene image:

[Divers]

o dear god....I give up! Its an OLD CAR....was I supposed to put old rubber hose, 65 amp alternator. Just forget it. I will figure this out somehow. I should just get a parts car and put 30 year crap on it.

PLEASE to all NO MORE POSTS TO THIS THREAD....MARK please delete or lock the damn thing..its just not worth it.

[bradartigue]

NOTICE (ATTENZIONE!): In light of being criticized for harshness this message has been replaced with the following serene image: