All or Nothing: My 3L Turbo Install

[gamiller]

Originally Posted by DanG

My dad used silver rod on the fuel rail. I wouldn't recommend they take the fuel rail apart if they can help it- I'm afraid it won't go back together and align with the UIM and fuel lines properly. It should NOT be an issue to re-braise the connections (as well as the compression fittings to ensure a permanent fix) in-place. What is the issue exacty?

As you can see in the photo below, there was a hole between the brass fitting and the fuel rail. I hope it wasn't a result of the fuel rail making contact with the motor mount while driving. Anyway, the second shop to which I took the rail brazed over the hole with silver rod and pressurized the rail underwater to 30 psi - at which point an injector unseated. The compression fitting was tightened up a bit as a result of the pressure test. I picked up the rail last night, purchased some tools at Sears, and then got dinner. I didn't get to commence reinstalling everything until after work today. I hope I can recall from last week how everything goes back together!

[warmonger]

Good luck with everything!

[gamiller]

Originally Posted by warmonger

Good luck with everything!

Tom, what do you and Joey think about my discovery? We can discuss this offline if you prefer.

[warmonger]

Originally Posted by gamiller

Tom, what do you and Joey think about my discovery? We can discuss this offline if you prefer.

Hmm, some how I missed that 38# thingy. Well simple really, we'll exchange them no problem. Not an issue for us because we'll make sure Precision makes good on it for us too.
Where did you get the information that they are 38# injectors though? I want to know the information is reputable before I go ***** them out with guns loaded.

[gamiller]

Well, there are several car forums (e.g. BMW, Z28, LS1) that mention what is what, but the sites that carry the most authority are probably vendors:

01D030B Injectors (42#)
01D030B Injectors (42#)
D1163BA Injectors (38#)

I'm quite curious as to whether the impedances are anywhere close as well, but I won't have access to an ohmmeter until my buddy returns from Cali. Both injectors are manufactured by Lucas, who was apparently recently acquired by Delphi.

Precision Turbo sells both types on their website. It seems likely that they got the two products mixed up:

Part#     Flow Rate  Impedance  Resistance  Open     Close    Nozzle  Spray
041-0380  38 lb/hr   High       12Ω         1.660    0.970    Disc    N/L  	
041-0420  42 lb/hr   High       12Ω         1.660    0.970    Disc    N/L

Tom, would it be unsafe to drive my car with this setup? I should have gone with my gut and looked up those numbers sooner!

[gamiller]

Today was going to be a good day. I had the newly-repaired fuel rail in hand along with my new in-lb torque wrench. After torquing down the fuel manifold and intake manifold and plumbing the intake, I pressurized the fuel system about five times and took a look under the hood. Would you believe the other end of the repaired fitting was spitting at me! Apparently the shop didn't tighten things up enough. I wish they had brazed the threads of all the fittings! At least the fitting wasn't pissing fuel like before!

A few turns of a wrench later, the fuel rail seems up to the task of a short drive to AutoZone for some engine oil. I let the car find idle, then show it 1500 RPM for a minute, then I hit the road. On the way out, the car acted like I was power-shifting. The throttle would spike 1000 RPM when I put the clutch in and selected a gear. On the way home, things got much worse...

Twice when I approached a stoplight, depressed the clutch, and put the car in neutral, the RPMs soared to 5K! HOLY THROTTLE HANG, BATMAN! I feared it would bounce off the rev limiter! It didn't, but it took almost ten seconds for the RPM to come back down so I could shift into gear without spinning the tires. My plan was to change the oil tonight, but I'm afraid the car will try to kill me once I crawl under it. I guess I won't be driving to work next week.

The only DTCs I have thus far are the following:
P0172 - System Too Rich (Bank1)
P0175 - System Too Rich (Bank2)
P1000 - Monitor Testing Not Complete
P1405 - DPF EGR Sensor Upstream Hose Off or Plugged

[PREDATOR]

I hope you get the issues worked out... that looks like a killer set up

[StealthyWeasel]

Yeah, I am familiar with that throttle hang problem.

Let me tell you something- the throttle system is extremely sensitive to changes. I noticed when you have the car completely stopped it will come down, I assume the IAC takes everything over when the vehicle speed is zero.

Is the cable in the EXACT right position?
Does the throttle body have the ability to turn past wide open throttle? (Reason I ask is that if it does, it has the chance to overturn and break the return spring in the TPS, and will make the throttle hang like that)
Have you modified the throttle body in any way?

[FastCougar]

I too experience this and will be replacing my TPS sensor soon to see if it solves the problem.

[gamiller]

Do you guys experience the rev climb as well as the throttle hang? It's as if I stomped on the gas pedal in neutral! Even at a complete stop, it takes awhile for the revs to start to come down.

Originally Posted by StealthyWeasel

Is the cable in the EXACT right position?
Does the throttle body have the ability to turn past wide open throttle? (Reason I ask is that if it does, it has the chance to overturn and break the return spring in the TPS, and will make the throttle hang like that)
Have you modified the throttle body in any way?

The throttle cable is in about as good a position as it can be for the 3L UIM. I will check to see if the throttle can be opened too far. No mods have been made to the 3L TB.