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> L-jet wiring at coil
r_towle
post Dec 29 2005, 12:33 PM
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aar has vacuum hoses to it and the intake...

all vacuum lines need to be in place correctly, not monkey rigged...

This is a very touchy system versus the djet...no mony rigging allowed....

I spent several days trying to get it started and until all was correct it would not start.

Rich
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bd1308
post Dec 29 2005, 12:34 PM
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guess i need to go to FLAPS.

b
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bd1308
post Dec 29 2005, 12:35 PM
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but okay, whats the deal with no power at the fuel pump when the AFM is moved?

is it that yellow wire?

b
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John
post Dec 29 2005, 12:41 PM
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You could jumper a ground to make the fuel pump run per this pic.

This would energize the fuel pump relay when the key is on (as long as you are still using the fuel pump relay on the relay board).



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r_towle
post Dec 29 2005, 12:42 PM
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The deal is that you changed the wiring to the fuel pump.

I would suggest that you put the wiring correctly to the fuel pump so that the AFM controls it as it was designed...

Rich
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bd1308
post Dec 29 2005, 12:44 PM
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well the issue here isnt that my fuel pump doesnt run--the issue is that, while my fuel pump runs, I get no indication that the FI system is working. I can only sumise from the bubbles that my regulator is hooked up correctly (and from the hose diagrams from Pelican it shows they are) and that I have spark. Besides from the clicking when connecting wires from the relay, I have no reason to believe that this is even on.

b
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r_towle
post Dec 29 2005, 12:46 PM
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hang on for a sec....

that is the djet relay setup....

I only have one relay there...

Look in the haynes manual...it shows a pic of how the relays should look and the spare wire that is connected to the open bank of tabs.

Rich
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bd1308
post Dec 29 2005, 12:49 PM
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HUH? (IMG:http://www.914world.com/bbs2/html/emoticons/ohmy.gif)

I have the same relay board.

I'm screwed aren't I?

b
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r_towle
post Dec 29 2005, 12:51 PM
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no the relay board is the same.

The LJET uses only one relay from that board.

The other relays are under the battery tray and are bigger..

Rich
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John
post Dec 29 2005, 12:56 PM
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B

The relay boards are the same D-Jet or L-Jet. It's the wire harnesses that are different. The spare relays shown in the pic are spares (I believe mainly to keep dirt out of the pin holes).

Does your fuel pump wiring still use the fuel pump relay?
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bd1308
post Dec 29 2005, 12:59 PM
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at this present moment, no. I have the Haynes manual and I found pin II on the relay board, so the yellow wire is connected. As soon as I get this running, I was going to go to radioshack to pick up some connectors and wire my fuel pump the *RIGHT* way.

b
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bd1308
post Dec 29 2005, 01:10 PM
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following this troubleshooting guide for L-jet motors, I get to the part where it suggests to replace the dual relay...

is this a FLAPS part, or special order?

b
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lapuwali
post Dec 29 2005, 01:15 PM
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You should be able to test the relays themselves. There's nothing magic about them, they work just like other relays do.
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r_towle
post Dec 29 2005, 01:22 PM
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dont make it so complicated in your mind.

to make it fire and start you need gas, air and spark.

You have spark.
you need fuel.

You can run the pump all the time , and it will last for a bit, but eventually it will burn out.

So for this test, jumper it so it is running and make sure you have fuel at the injectors, at the right time...

I take out both injectors from one side, put them in baby food glass jars, run the pump and turn the motor over...

You should get fuel in each jar...if not they are not getting the signal to fire...

it is an electrical signal of something like 3volts.

Again a test light will work here also.

If you find one is getting fuel and the other is not, switch them to make sure the injector is not clogged.

Make sure you have pressure at the injector as well.

Dont be looking for relays just yet.
As I recall they control the fuel injectors, so you need to determine which one is bad, if any.

Rich

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Mueller
post Dec 29 2005, 01:27 PM
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QUOTE (bd1308 @ Dec 29 2005, 12:10 PM)
following this troubleshooting guide for L-jet motors, I get to the part where it suggests to replace the dual relay...

is this a FLAPS part, or special order?

b

I think it's a specific dual relay, last time I bought a new one it was $75.....

you should easily be able to duplicate the dual relay using the stock relay board or use 2 of the GM style square relays, I'd lean towards using the 2 GM square relays, just make sure you use insulated female spade terminals and crimp them good....GM type relay should be less than $10 each

it's pretty basic, AFM energizes 1 relay* which turns on the fuel pump...easy

the second relay gets energized via either from the 1st relay or the AFM as well which then supplies 12vdc to the injectors (the + goes thru the resistors before the injectors, very important to follow that)

*(without looking at the wiring diagram, not sure if it really supplies + or if it supplies ground to complete the circuit)
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bd1308
post Dec 29 2005, 01:30 PM
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now the battery is dead.

this day is good.

b
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jim912928
post Dec 29 2005, 01:39 PM
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Easy way to check if your injectors are opening/closing on an ljet before popping them off is to:

1. remove the distributer cap
2. make sure the points are closed
3. turn on the ignition
4. open and close the points (don't use a metal instrument..don't want to fry anything!)

By doing this, you should be able to hear the injectors opening/closing...you'll hear a noticble click at each one. This will tell you if you are getting juice to the injectors. If those are clicking...then you have a fuel distribution problem. Here I'd make sure you have oil the fuel lines hooked up in the right direction. I'd go look at mine but it's up in milwaukee and I'm in IN this week.

Jim
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bd1308
post Dec 29 2005, 01:48 PM
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uh, houston, no power to the injectors.

b
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Mueller
post Dec 29 2005, 01:59 PM
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QUOTE (bd1308 @ Dec 29 2005, 12:48 PM)
uh, houston, no power to the injectors.

b

relay problem.....do you have power to the resistor pack?

I'm guessing no....
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Mueller
post Dec 29 2005, 02:02 PM
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for testing ONLY......

you could run a 12vdc + to the resistor pack and fuel pump using a toggle switch (the toggle switch would "mimic" the AFM being opened and the relay circuit activated when flipped on)
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