Jonathan12uiz

Hey guys my car isn't getting any injector pulse.

Fuel pump it pumping fuel, fuel injector amp is showing good continuity, maf is humming... what could it be? bad injectors?

junito1

I had a similar problem like this.

My primary injector wasnt firing. Therefor my motor was running on one rotor.

YOu should check the resistor pack on your engine bay. ALso you could check the injector pins right in the ecu. If those work fine then it should be your injector plug went bad.

Soulder in new injector plugs. This is what i had to do.

Jonathan12uiz

how to i check the injector amp resistor. it has 5 pins. power comes from the middle one. there is continuity through all the pins from the power pin. does that mean its good? is there a resistance test for it, because i'm getting 6ohms of resitance to each pin.

junito1

Ok, im not sure on this. BUt 4 of those should read the same. ABNd one is a ground i think.

YOu could also skip that process and go directly to the injector clips. Put the key on the on (not crank). ANd see if your primary injector plugs read the same.

If one is weaker than the other it could be that injector plug.

HAILERS

They should read approx 6 ohm from the middle pin to any of the other pins. IF so, then there is no problem there.

Instead of pulling the intake off to look at the injector plugs, pull the small plug off the ECU. Key to ON. Check the green/red, green/white, green/black and pure green wires for batt voltage. It should be there on all those wires. If so, then there's nothing wrong in the engine bay.

IF you have not had the harness on the engine off recently, then there is no reason to think the ECU ground is bad. Got me what's wrong.

The middle wire is Black/Yellow and supplys power to the other wires. The other wires go directly to the fuel injector plugs. The OTHER wire on each injector plug goes to the SMALL plug on the ECU I just mentioned above.

It's called a Solenoid Resistor Package. It adds approx 6ohms to each fuel injector circuit.

junito1

yEAH.. HAILER IS THE ONE THAT HELPED ME.

so follow his steps. Mine were half *** anyways=)

good luck. and be patient.

HAILERS

Always good to have others pipe in. Thank you.

Jonathan12uiz

Ok my solenoid resistor package checked out good. the middle pin to each 4 pins read 6ohms.

my fuel pump relay solenoid and resistor pack were questionable. specs were: pins:
a-b = 0 ohms
c-d = 68-92 ohms
e-f = 0.64 ohms

my test results were:
a-b = 0.3 ohms
c-d = 80 ohms
e-f = .8 ohms

as you can see the a-b and e-f pins had a difference of about .3ohms. i'm giving it some leway since i have a pos craftman voltmeter. or do you think .3 ohms is too much difference?

also i tested the small ecu plug
g/r - batt volts
g/w - batt volts
g/b - batt volts
g - batt volts

so if your right, everything in the engine bay should be good right? now what is this ecu ground problem you speak of?

I just bought the car for 1k and it's been sitting for a while. I don't really know what they have done to it so far I'm just starting with the basics and where my problems lie.

you think this could be a faulty ecu since my ecu plug readings are good?

Jonathan12uiz

new developments guys... found that my fuel pump is getting power from the blue wire going to it, but it's not coming on. no fuel going to the fuel filter or anything?

thinking i might just have a bad fuel pump, since all my other readings were good.

btw... there are 4 wires to the fuel pump. blue is the power wire according to the wiring diagram. black is the ground, but what is the black/white wire and the red wire?

HAILERS

Your colors confuse me. See my second jpg. It's the wire colors in the fuel pump plug located on the back of the left rear strut tower. Blue is the power wire and black the ground. The other two wires are as seen in the first jpg and are for fuel level and the idiot light that comes on when the fuel is low.

Wire colors on the pigtail of the fuel pump itself are not mentioned in the FSM but all you have to do is see which of the wires in the Harness side of the plug they mate with, to tell what they do in life. You know that. I just mentioned it just in case.

Fuel pump does not run by putting the key to ON alone. Pump runs with key On and the yellow fuel pump check connector jumpered. Pump comes on with key ON and the engine actually running (afm vane moved aft at least a 1/8"). Fuel pump runs when the key is HELD to START.

So, if the afm vane is pushed aft or the yellow check connector is jumpered you have power on the BLUE wire at the left strut tower plug. Pump should run if the black gnd wire is.........grounded. It obviously does not. So pulll the pump out and clean the *sock* on it, look for loose connections.....try to jump power and gnd to it from the batt to see if it'll run........if it does not run get another.


The A TO B being 0.3 ohms is just fine and dandy. That switch should be closed and showing continuity from A to B. The 0.3 is continuity and is mostly the resistance of the meter leads. Turn you meter on and put it on ohms. Touch each lead to the other. I bet it shows 0.2 to 0.3 ohms.

Jpg out of the series five FSM shows they changed that value of e to f to what's shown in the jpg.

Jonathan12uiz

quick question, where is this connector where i can jump the yellow wire to test the fuel pump. funny thing though is i already have battery power to the blue power wire on the pump when i put the ignition on. so where is this connector at so i can just double check.

hanman

The yellow connector is right by the air filter box.

HAILERS

The plug with the BLUE wire. Tell me. Is this on the elect plug on the aft side of the left rear strut tower? OR NOT?

It sounds like your looking at something else. You mentioned a black/white wire. The black/white is on the pumps PIGTAIL and is connected to the BLUE wire at the back of the left strut tower. LEFT REAR, STRUT TOWER. Under the carpet.

I really did mention all this in my above posts. The BLUE wire on the pigtail IS NOT THE FUEL PUMP POWER.

The BLUE wire in the PIGTAIL is for the low fuel warning light. Not the pump power.