Wrestling with getting injectors off the fuel rail.
Accidentaly pulled 2 wires loose.
They are female crimps and should fit a plug that inserts into a socket on the MAF unit.
It happens somebody one time must have wrecket the plug, because I find those wires were just pushed onto the blades in the socket.
The wires are red/white and green/white.
Can anybody help me to say which is uppermost in the plug.
Not sure if the polarity is important but best be safe.

I searched to find a way of releasing the fuel line from the fuel rail.
Took a while to get an answer.
The photo shows what you need ( there are variations of this tool )

Release tool for fuel line

Loose wires on MAF
and there is a Youtube video about releasing Ford fuel and AC lines with such tools..

 

Which engine is in your XJ? Can you post a picture a bit further back showing where the wires connect? The photo above is too close to tell what's what. That does not look like the MAF to me. Looks like a temp sensor.

 

Thanks for reply, appreciate the help.
Engine is a 3.5L V8, NA.
That looks like a stepper motor on the side of the MAF.
There is a 4 wire connector to drive the motor.
The 2 loose wires could be a temperatiure sensor.
I will temporarily just put the crimps back on the socket blades.
Later look for a proper plug.


V8 3.5L

 

Follow up to wire colours.
I tried to measure any resistance across the 2 blades of the socket.
Very awkward to get at, but 95% sure it is an open circuit.

Seeing the plug/socket is on the side of the stepper motor it may be something like a microswitch to show full travel of the throttle, or to show zero travel.
In that case it would not be polarity sensitive,
I could start the engine without the connection and take it from there.

All the same, much happier to know which colour is which before starting.

 

And another follow up.
After much effort found a wiring diagram for my 2003 3.5L V8
Vin is G00869, a very early car.

So the 2 wires are for a DC motor, no stepper motor here.
That meas if wires reversed buterrfly will drinve wrong way and flag an error.
We put re/white on top and that worked, engine starts and throttle response O.K.
Seems to be misssing on 2 or 3 cylinders, or maybe low fuel pressure.
Will put scanner on it tomorrow and see what gives.

 

The part in question is the Throttle Body, not the MAF (Mass Air Flow). Looking at the 2004 electrical diagram, it does appear there are 2 separate connections on the early style TB: 4 wire for the TPS (throttle position sensor) and 2 wires for the motor drive. Red with a white stripe, and green with a white stripe are the 2 in question. Unfortunately it does not indicate which is the correct polarity. I'm not familiar with the early TB design, so hopefully someone else with the early year can verify. But sounds like you have it working. I'd definitely get a replacement connector as soon as possible, that's not a connection you want to fail while driving down the road.

 

My mistake MAF versus throttle body - not up to speed on drive by wire details.
Now I take a closer look obviously MAF is separate to TB
Once I had the correct wiring diagram for this early car it was plain sailing to figure out a fix.
The two wires for the DC motor actually slipped out of the plug. I have found the plug.
I have an electronic manufacturing business and we have many types of connector which are industry standard outside the automotive field.
Automotive connectors are a different breed mostly becasue of specific requirements such as weather proofing.
So the two crimp contacts from the plug do not seem to have the usual tangs to lock them.
For now I am not sure how they do lock in to the plug, but plan B is silastic will make sure they stay put.

This car has given little reason to go poking around the engine since about 2010 when fuel pump and fuel pressure sensor failed.
Apart from giving it routine oil changes, a change of brake fluid and transmission fluid, new plugs and a few minor fixes there has been little to do.
I spend far more time with my two XJ-Ss.

 

Rough engine was 2 injector plugs not fully seated.
This car donated to my stepson who wanted to take all 8 injectors to a specialist for checking.
I could have done that with ultrasonic cleaner in my factory, without flow test.
Specialist said never seen such clean inijectors, just replaced O rings.
The Ford injector bodies had some cracks but not terminal issue.
The plugs used by Ford not so good, locking tangs broken on 2 of them hence problem.
Judicious use of silastic will keep them safe.

Don't think Ford injectors & plugs are as rugged as Bosch ones on my V12 XJ-Ss.
I have been using Lucas UCL on all 3 Jags for last 3 or 4 years.
Lucas makes extravagant claims about benefits.
I just want to add a bit of lubricity to fuel to help fuel pump and injectors last a long time.
Maybe it works well !!

 

all the engine management equipment is Denso. this is the throttle motor plug in a car i'm working on, it's also held together with RTV. the fuel injector plug is EV6 type, cheap and easy to find.

 

[QUOTE=xalty;2374437]
the fuel injector plug is EV6 type, cheap and easy to find.]

I can certainly believe cheap.
Thanks for info, the "Junior Timer" plugs used on the old Bosch injectors not so fragile.