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Injectors have no power


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#1 Gusnofear

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Posted 31 August 2018 - 06:56 PM

Hey I need some help figuring out why my injectors arenít working itís on a 1984 conquest and canít find the problem

Edited by Gusnofear, 31 August 2018 - 07:11 PM.






#2 Preludedude

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Posted 31 August 2018 - 08:31 PM

Well first of all...Have you replaced the injector clips?



#3 87redcat

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Posted 31 August 2018 - 08:32 PM

Have you checked the injector resistor on the rad support behind the right headlight
I got blisters on my fingers!!!

#4 markhansenconquest

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Posted 31 August 2018 - 10:10 PM

Check plastic knock box on drivers side fender wall.................................

#5 croquest87

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Posted 01 September 2018 - 05:25 AM

Test if you are getting power on the wires that go to resistor first. Should be 2 wires that supply full 12 volts to it. If good?  Your problem is from that point to the injectors.  Also check the ground by the ecu.  The way it works. These are low impedance injectors!  Power is supplied through resistors  to one side of the injector. Ecu uses ground to activate injectors or to pulse them!   So if you have power to the injector on one side  the other side which is ground that comes from ecu could have issues.  Ground is very important here.

Edited by croquest87, 01 September 2018 - 05:27 AM.


#6 Gusnofear

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Posted 01 September 2018 - 11:09 AM

My resistor has 12v to it and the relay in the car I checked the ecu and itís working and has power, my clips on the injectors are clean

#7 scott87star

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Posted 01 September 2018 - 12:20 PM

The clips can be clean and still not make contact, teplace them.  Itís tripped many of us up and caused lots of these to be abandoned.  Thatís how I got my first.
Now selling true plug and play megasquirt!  Absolutely the best value in stand alone ECU's out there.

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ECU Vendor link:  http://www.starquest...howtopic=137426

#8 Gusnofear

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Posted 05 September 2018 - 07:23 PM

Ok so my engines running now but itís running super rich to the point my turbo was glowing. Any ideas on how to fix?

#9 tsi_tom

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Posted 05 September 2018 - 08:13 PM

View PostGusnofear, on 05 September 2018 - 07:23 PM, said:

Ok so my engines running now but it's running super rich to the point my turbo was glowing. Any ideas on how to fix?

What was wrong with the injectors?  Has this car been sitting for a long time?
Engine
20 over forged pistons
Stock injection system

My restoration project: The Missouri Project

#10 Gusnofear

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Posted 05 September 2018 - 08:29 PM

The injectors are working properly now. And yes it has been sitting for quite some time but I did a full rebuild on the motor and itís running really rich now


#11 croquest87

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Posted 05 September 2018 - 08:44 PM

Afr gage readings? Glowing usually indicates lean condition/overheating


Edited by croquest87, 05 September 2018 - 08:45 PM.


#12 tsi_tom

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Posted 05 September 2018 - 09:01 PM

The injectors need to be cleaned. What does the inside of the gas tank look like?  What was originally wrong with be injectors?  What did you do to fix them?

Edited by tsi_tom, 05 September 2018 - 09:02 PM.

Engine
20 over forged pistons
Stock injection system

My restoration project: The Missouri Project

#13 Preludedude

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Posted 06 September 2018 - 04:18 AM

Glowing could be a clogged cat?




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