Engine Loom

[Steve B]

oh i no it will be back..   ..you get different stages with it... before i played around today it was constant. now its gone away and i think its all because the offending wire or wires have been pulled around... but there is only 5 of them on the coil pack so it must be one of them 

[05omegav6]

Clearing the codes works for a bit, which is frustrating, but does suggest variations in the resistance within the loom...

[Steve B]

And them 5 wires that we plug in the coil pack go to here do they..so i could strip back tape/wrap and renew 5 only wires all about 2-3 feet long 



Just for STMO 

[05omegav6]

You want to be three inches nearer the bulkhead... Will take a pic of where you get to for where the common feeds split

[Steve B]

Be nice to see a wiring diagram for these coil packs... is there one anywhere 

[Steve B]

Ive seen it chuck up 302 304 &306 Al  But always 300 first then 306 then 302 and last of all 304

[05omegav6]

At its worst, mine had five misfire codes plus 0300 and both knock sensors...
Could be that the solder/crimp where the common feeds join is breaking up from heat/vibration cycles

[Steve B]

At its worst, mine had five misfire codes plus 0300 and both knock sensors...
Could be that the solder/crimp where the common feeds join is breaking up from heat/vibration cycles

And there is also a join in the Earth at pin 1..When it goes from 1.5--2.5mm wire 

[05omegav6]

That's the other common wire

Joints are both taped in the cable tray, about halfway tween the spur from the ecu and the bulkhead end of the tray

[Steve B]

Are the 2.6 & 3.2 Identical looms 

[05omegav6]

Yup only difference is manual and auto

Will try to remember to get you the loom part number and ident from my 3.2 auto loom

Thinking out loud Robsey MV6 is breaking a 3.2 auto...

[Marks DTM Calib]

There is no ground connection associated with the coil pack, there is a common pos feed and then each coil is pulled low by the ECU to energise them (the spark occurring when the ECU turns the current off)

[05omegav6]

What's this then?



In particular Pin1 on both coil packs...

Without a loom infront of me, they join in the cable tray and iirc return to ecu

BkRd being the common ignition feed +12v

[Steve B]

Right Gonna get my hands on a engine loom tomo off a auto and make a start on the swap over (dreading it) So whats involved..What needs to come off in order to get loom out...Take it you start at the ECU

[05omegav6]

Up on ramps, unplug the lambdas and gearbox plugs, and pull the lower loom over the top of the box to the lefthand side.

Remove plenum and front cabletray cover...

Then unplug...
Front multiram and Maf sensor,
both knock sensors,
cam and crank sensors,
135 cp,
purge valve,
ecu temp sensor (mark this one),
temp gauge sensor,
rear multiram,
injector loom,
246 coilpack,
ecu plug including earth lead to the mounting plate,
two round plugs by battery,
lift off, pulling the cat/gearbox wiring up as it comes...

Bish bash bosh