View Full Version : Engine loom identification?
Can anybody tell me what loom should be on my engine? im just checking a few details as im struggling to get this going.
I bought the engine as an early type with dizzy and coil, the manifold doesnt have a lambda sensor but the inlet has the vent valve,the engine came with no loom.
So if i put the engine number on here can anybody help?
:(
An early loom. With out a lamdba plug. They all have vent valves i believe. Burgo its a 20xe.
Benn im sure the engine number is c20xe blah blah blah, Im going to get it now because somethings not right !
Right engine number is 20XE 14129182
was looking at the pic you posted of the wiring. It looks like the right loom as only astra gte looms had the plug there, what code is on your ecu? fx?
The ecu that i have with the engine is a GD, but i also got one with the loom and it is a motronic but no code on it?
Jon_nova1
15-10-09, 09:46 PM
Would it matter if a different engine loom was used? aslong as the sensors matched up? thought i'd ask, since theres a topic here about wiring lol
Would it matter if a different engine loom was used? aslong as the sensors matched up? thought i'd ask, since theres a topic here about wiring lol
How would it be a different loom if the sensors matched up? lol
I dont think so,every plug on the loom goes to the appropriate sensor etc, but compared to the later engine its a pain to connect up ive tried both ecus and both come up with same fault ,the last one of these later spec c20xe i put in my mk4 astravan it only used 3 wires iirc to start the thing,this ones doing my head in lol
Jon_nova1
15-10-09, 09:55 PM
How would it be a different loom if the sensors matched up? lol
for example, i have a loom, it has 6? pins for the throttle position sensor, other than that it matches, if i got the 3 pin throttle position sensor that would fit, would that work?
for example, i have a loom, it has 6? pins for the throttle position sensor, other than that it matches, if i got the 3 pin throttle position sensor that would fit, would that work?
Doubt it, and that would be a case of the sensors not matching up as 3 does not equal 6 lol They have 6 or 3 wires for a reason.
what exactly is it doing/not doing?
List what wires you have connected,
xe loom (colour) - - nova loom (colour)
Anyway back to me ! lol
Anybody got any ideas? Could i have wired something wrong that causes the ecu to think the sensor is faulty?
Xe loom Nova loom
Red (big) =Red (Bat positive)
Blue (big) =Red Blue (fuel pump)
green =Green (Rev counter)
white = Not required (trip computer on gte)
Black yellow =Ignition (tempory taken from wiper motor)
Brown blue =Brown and blue Ecu light
Jon_nova1
15-10-09, 10:01 PM
lol which sensor is showing as faulty?
Anyway back to me ! lol
ASW!
Wiring looks ok to me :tard: Did you check that lives are live and sw lives are live with ignition on, and not just the wrong end of the right colour wire?
Crankshaft sensor code 31,so i went and got a new one from autovaux and its the same, ive spent £70 on crankshaft sensors and it doesnt change a thing.
Yes lives are correct , permanant and ignition
Jon_nova1
15-10-09, 10:10 PM
Have you checked the wiring from the crankshaft to the ecu?
Well its a short loom and the sensor is new so thats half of it lol , i didnt really want to split the factory coating unless i have to
you will always have a crank sensor code present without the engine running, is it turning over? Whats happening when you try to start it? Is it arming the fuel pump? sparking ok? all your earths connected up?
Was it a known running engine?
Well its a short loom and the sensor is new so thats half of it lol , i didnt really want to split the factory coating unless i have to
Just get a multimeter with continuity check on it.
Multimeter i will check the continuity tommorow im sure this is ok and intact,the car is turning over fine and the engine was supposedly a good engine but was sold without wiring due to bodged loom off donar car (so i was told) the relay is clicking but the pumps not priming? ive read that it wont spark or prime with the crankshaft sensor faulty? The ecu light stays on even when turning over,but will go out after the paperclip test.
To check the resistance of the coil between the two points what sort of reading should i get? just to rule that out also?
so you have no pressure in the fuel rail at all? got another relay to try? have you checked for a spark?
Well if i press the valve on the rail i get fuel spitting out , there is no spark at all,tried a spare relay its the same
Are the plugs wet?
got an earth from gearbox to chassis leg? alternator bracket earth good? earth on starter?
Yes all earths are good gearbox strap as well and i checked continuity with multimeter to all points of earth. Plugs not wet no ( i will check that again tommorow ive been going round in circles) But you can smell fuel thinking of it when turning it over
Have you plumbed the fuel pipes to the rail the right way?
Yes I believe so , in on right and return on left next to regulator
If its getting fuel you can forget about the crank sensor,
tried to see if its sparking from the actual coil (not by leads). Check what the dizzycap is like make sure its not all green on the contacts
Checked just the coil still no spark, seems hot as well (the amp),contacts seem ok too
so its getting power into the coil but not sparking, is the coil bracket earthed through the inner wing? got a spare coil to try?
Yes at the plug im getting 12v between the live in and ground and the bracket is bolted into the inner wing also,i checked the continuity of that with the multimeter as well, are we running out of options?
Back to the xe loom plug there is also a small red/blue any ideas what this is for? on the diagrams all the red and blues seem to be fuel related but its small cable so not for the pump.
Rich have a look at this a guy on migweb sent and see if you can see anything i cant?
Or send me your email and i will send this on so you dont have to download it etc , it might be a good sticky also if we ever solve this lol .
http://www.mediafire.com/file/nmxtzwyhyyn/M2.5WD.pdf
Sounds silly but when u turn the wipers on does it work as u have ur ignition from the wiper motor which will only get 12v when the wipers aee on
Sounds silly but when u turn the wipers on does it work as u have ur ignition from the wiper motor which will only get 12v when the wipers aee on
He did say he checked the lives, so as long as that is +12v, and it's earthed on the engine loom, that should work.
No the ignition live is from the ignition side , the motor needs the ignition live as well to work as well as the switched lives from the wiper switch.
I can see me and a big hammer going out tommorow to sort this out lol
Anyone got any cheap throttle bodies lol
ok the small red/blue on the 20xe loom is not needed. the thick blue is the fuel pump feed on the 20xe loom which goes to the blue/red on the nova loom.
20xe loom -- nova loom
red ------------ red
thick blue ------ red/blue
black/yellow ----black
Thats all thats needed to start it, if you are getting feed to the coil but its not sparking looks like thats your problem.
How are you checking it for spark?
Been using the lead from coil to dizzy,(tried the ones off my running 1.2 also) and touched them against the head also had a screwdriver in there to the head as well :(
I will try and get a new coil etc tommorow to rule that out also.
Just dipping in to what i said at the start, if it has no cat/lambda its a 20xe.
Yes benn the engine number starts 20 xe
No mate im waiting for a coil pack,there harder to find than you would think lol
The Simps
19-10-09, 01:15 AM
Really scratching my head on this one. As I said in a PM, my SRi the, pump never wizzed until the engine was running. My old GTE however you heard it prime.
Is there anyone nearby with a running XE that you could use for testing? ie swap over coil then leads, then dizzy?
Where are you?
Im in wakefield near leeds, a lad called round the other day but his isnt a dizzy version so couldnt swap anything, hopefully it will be the coil simps
The Simps
19-10-09, 10:50 AM
If you get really stuck I could post you all my xe bits if you paid for postage (I have an astra gte XE) to try out. But would obviously be easier if you used someone closer.
hi simps, coil pack arrived today and its started straight up, will have to wait till the neighbours go out to test it fully as theres no exhaust on there yet lol
The Simps
21-10-09, 10:49 PM
Glad to hear it mate!!
diagnostics from the comfort of a computer chair :cool:
glad its running
Me too guys thanks for all you help i will give you some + rep for this !
After all that messing about it was the coil and amp , managed to get one off novarally for £14 posted so 4 long days searching the internet and we have cracked it.
Will be getting the driveshafts in tommorow and sorting the exhaust ready to get one custom made then i might even start a project thread lol
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