Thread: Injector Plugs mixed up

Is it possible to mix the injector plugs up? If so how would you tell if they are on the wrong injector?

I just put them back on based on the length of the wires, but the efi wiring was stripped and re taped up.

Could this be making my disco run bad and blow heaps of black smoke?

Originally Posted by justinc

Injectors are separated by Bank only, so individuals on 1 bank can be swapped with no issue. The fuel temp plug LOOKS like the coolant temp plug but a different colour, IF they have been mixed up during the retaping experience this could be your issue. Black smoke however sounds like a possible airflow meter fault though.

JC

HI JustinC,

Thanks for your reply, i think i got the fuel and temp sensor the right way based on my notes below.

Water Temp Sensor
Blue/Green = 5.01v
Red/Black = 0
ohms @ plug 1.970
WARNING: No Buzz

2.72 resistance @ sensor (new sensor)

ECU ohms readings @ pins 35(blue/green) should be around 3760
results = 4.14 on 20k only
no buzzing

The Coolant Temperature Sensor should change resistance with heat, per the following specs.
10C (14°F) 9100-9300 Ohms
0C (32°F) 5700-5900 Ohms
20C (68°F) 2400-2600 Ohms
40C (104°F) 1100-1300 Ohms
60C (140°F) 500-700 Ohms
80C (176°F) 300-400 Ohms
100C (212°F) 150-200 Ohms

Results 2700 (good for temp today)

and temp sensor as follows
Fuel temp Sensor
RESULTS:
Red/black = 10.96v
Grey/white = 10.45
ohms @ plug = 1.970
WARNING: No Buzzing

ohms @ sensor =

ECU Readings
Results = 0, no buzz, unplug from ecu & 1.049 on 2k setting
Sensor Reading at pins 32(grey/white) & 25 should be 3880 of net
Results = 1.05 on 20k
19.83 with positive to red/black

I am by far no electrition but i think im on the right track (good learning curve).

I reset the maf to 1.3 along side the throttle position sensor

RESULTS:
My Volt Readings:
Red Wire 10.6v
Red/Black 11.05
Yellow 11.05

NOTES:OHMs
ECU Terminals 3 & 25 OHMS should be 4000-6000 ohms
Results = 5.1k

Terminals pins 20 to ground 4.2 to 4.9 on open throttle
and 0.085 to 0.545 closed
Results = 0.35v to 4.8v

It runs really bad and blows black smoke, you can here alot more compression when its running from the unburnt fuel, the oil now smells like fuel its burning that much.

I cant here a ticking from the injectors when it runs, so i thought i may have had them mixed up (but u have just clarified this) and im now thinking they are stuck on full time some how.