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> fuel problems
70-914nut
post Apr 12 2011, 07:43 PM
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Need help with fule injection for 1.7 1970. cant get the fuel to the engine. tried putting fuel in every line. checked fuel flow to the pump. seems to have a little air past the filter (new) pump is sluggish after rebuilding and cleaning the varnish out. i would think yhay the pump would pull fuel to the bay right? with the engine turning over but not starting the pump runs. i do have some vacuum lines gone but the big main one is there and the distributer line as well. please help. im ordering a new pump because i just dont think it is operating as it should. thanks
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RFoulds
post Apr 12 2011, 07:56 PM
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The fuel comes from pump to pressure regulator. if the pump is operating, but no fuel to the injectors, it may be the pressure regulator.

You need an inline fuel pressure gauge to check for sure.
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poorsche914
post Apr 12 2011, 08:57 PM
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Have you pulled the injectors and tested to see if any fuel sprays out when the pump is on? That will at least tell you if the pump is working.
Or simply look at the lines running up into the engine bay to see if fuel is moving in them. I was having similar issues and found out fuel was not getting to the pump. I disconnected the line at the filter and the gas came running out from the tank. Hooked it back up, and it started fine. Had an airlock so wasn't moving the gas.

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70-914nut
post Apr 13 2011, 09:54 AM
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pump isnt pumping sufficiently at all.
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pt_700
post Apr 13 2011, 10:16 AM
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after replacing my fuel pump, i'm at similar loggerheads. 70-914nut, what did you pay for your new pump and where did you get it?

thanks for your post, poorsche914! i'm thinking my replacement pump needs to somehow be primed before it can move any fuel.
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Dave_Darling
post Apr 13 2011, 04:47 PM
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The two most likely problems are that the hoses are hooked up to the wrong ports on the pump, or that the wires to the pump are plugged on to the wrong pins.

S == Suction; gets the hose from the fuel filter
D == Druck (German for Pressure); goes to the driver's side fuel rail
R == Return; goes to the Y that is hooked to the fuel pressure regulator and to the return port on the fuel tank

--DD
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70-914nut
post May 7 2011, 03:37 PM
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auto atlanta rebuilt mine. just installed it but cant get fuel past the regulator on the supply line. trying to get it unclogged now.
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914 shifter
post May 7 2011, 04:42 PM
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QUOTE(70-914nut @ May 7 2011, 01:37 PM) *

auto atlanta rebuilt mine. just installed it but cant get fuel past the regulator on the supply line. trying to get it unclogged now.

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Dave_Darling
post May 7 2011, 04:44 PM
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The regulator goes on the return line, not the pressure ("D") line. The pressure line goes to the right side fuel rail, that gets connected to the left side rail, that gets connected to the regulator, which gets connected to the return line. (And the Y fitting to the "R" port on the pump.)

--DD
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70-914nut
post May 8 2011, 08:21 AM
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getting fuel to the injectors but not out of them. not a drip. relay good, not sure of the wiring. NEED HELP!
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sfrenck
post May 8 2011, 08:38 AM
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QUOTE(70-914nut @ May 8 2011, 10:21 AM) *

getting fuel to the injectors but not out of them. not a drip. relay good, not sure of the wiring. NEED HELP!



Your injectors may be "stuck". Take them out and push on the "pintle" (little metal piece at the end of the injector where the fuel should spray out) and see if you can feel it move / click (if you still have them hooked up to the fuel system, gas will come out). If it doesn't easily do this, you need to send them out to be cleaned (www.cruzinperformance.com) - or buy new ones.

Also, you need the correct fuel pressure to make them work. Tee a gauge into the line ahead of the FPR. Report back your fuel pressure on your next post so everyone here can help you.
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70-914nut
post May 8 2011, 09:00 AM
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if the wiring is not correct, which i am searching now ie open from the oil pressure switch power will not get to the injector. at least thats what the wiring diagram says. my wiring is not in great shape. trying to sort out and make sure all of the connections are where they need to be. By the way where is the oil pressure switch located. i cant seem to find it
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70-914nut
post May 8 2011, 10:23 AM
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injectors stuck. trying to free them.
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sfrenck
post May 8 2011, 10:39 AM
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QUOTE(70-914nut @ May 8 2011, 12:23 PM) *

injectors stuck. trying to free them.


Don't "try" too hard. Better to send them out to be cleaned/tested by someone who works with them then mess them up. And the oil pressure switch is on top of the engine close to the distributor IIRC.
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70-914nut
post May 8 2011, 11:45 AM
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Thanks scott going to buy new ones monday. 48.00 a piece plus cores from AA hat going to them but i cant find any other sorces
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Spoke
post May 8 2011, 01:13 PM
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Do you know if your FI is energizing the injectors?

You can test this in 2 ways:

First, disconnect the +12V from the ignition coil. Tape the spade up if you think it might hit chassis ground. Removing +12V from the coil will allow you to turn the ignition on and test the FI w/o burning up your points or Pertronix.

With +12V off of the coil, turn ignition to ON and open the intake butterfly.

You should hear the injectors click. This should test if the injectors even operate.

Then remove the distributor. You can take the cap off, that is not needed here. But do keep the FI contacts connected.

With the ignition ON, spin the distributor with your hand. This will simulate the engine running, and the fuel pump should turn on and as you spin the rotor, you should be able to hear the injectors opening and closing.

You can even test for fuel flow by pulling out the injectors and placing them in a jar to see the spray. But you have to keep turning the distributor.
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70-914nut
post May 8 2011, 02:07 PM
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GO STEELERS Im not even sure my pressure regulator is conected correctly. I applaud your info on testing the injectors which may also be my problem. I do know the relay is good! thats about it. pretty frustrated at this point.
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70-914nut
post May 8 2011, 02:35 PM
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does anyone have a pic of the 1.7 pressure regulator and the hose routing? I am a little confused. I may have mine installed incorrectly.
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Spoke
post May 8 2011, 02:59 PM
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Here's my engine before installation.

In the pic, the fuel runs to top right cylinder (#4), across to #3, down the left side to #1, then over to #2, then to the pressure regulator, then back to the fuel tank.


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swl
post May 8 2011, 03:11 PM
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QUOTE(70-914nut @ May 8 2011, 12:35 PM) *

does anyone have a pic of the 1.7 pressure regulator and the hose routing? I am a little confused. I may have mine installed incorrectly.

http://www.pelicanparts.com/914/technical_...4_18FI_diag.htm

That diagram is not for your car but it clearly shows the positioning of the presure regulator.

Probably the first thing you want to do is see if you have fuel pressure. There is a tap on the drivers side fuel rail to hook up a guage. If you don't have a guage you can at least put a hose on that port and make sure you are moving fuel. If you aren't you have to first look at your connections as per Dave's post. If the plumbing is all good then you may have to suspect the pump. The 3 port pumps can be a pita.
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