4x4kiwi

I have the genuine ford sierra '90 wiring diagrams but have been unable to locate the 3 firewall plugs that connect the engine loom to the main loom. I am sure they are in there somewhere and I must be blind. I would expect them to show up in diagram 5F which is the engine management - fuel injection for the cosworth as this shows the ECU connector and all engine sensors but it does not seem to show the firewall plugs. Antone else with these drawings come across them or have a diagram of which sensors go through which plugs. Also does someone know which sensors use shielded wiring and weather the shield is supposed to be connected via a pin on one of these plugs (as opposed to just the inner wires being sent through the plugs) Thanks David

kosienutter

This is the wiring diagram I use for mine if that helps. Yours is a 4x4 isn't it??



Plus is it these plugs (circled) your on about???

cossiestu

Aren't these renown for causing all kinds of hassle due to damp in the joints? Got rid of mine years ago, looks a lot neater too!
Was just thinking, if yours were also cut out previously, that'll be why you can't find them!?

kosienutter

Yes they can be a nightmare. I have a new loom with those taken out and make the loom as you say much neater.

cossiestu

Glad it wasn't just me then?! Lol

kosienutter

Waiting for my cars current loom to do something like that lol

Paul_RS

iTrader: (4)

Those plugs were the cause of a missfire on my car as well. Cut them out ta fook!

cossiestu

The annoying thing with mine was that they were a really tight fit and looked clean, so never doubted them...

4x4kiwi

Thanks for the reply's guys. kosienutter - yes it is a 4x4 and yes those are the plugs. I had also hard wired out one of the plugs many years ago but when I recently took the head off I found it much easier to recut this connection rather than removing all the loom from the engine. When reassembling I redid this plug with a new sealed Deutsch
type plug and socket and am also intending to do the other two to hopefully get rid of an intermittant miss that I get particularly when cold. The symptoms are a loss of the CPS signal (tacho dropping ) so I was wondering which of these plugs this goes through. I have got the copy of the diagram shown and also the genuine ford set but cannot see the three plugs shown on any of them. Thanks again David