ghr Posted June 4, 2011 Report Posted June 4, 2011 Intermittent fault - starts okay but sounds and feels like there is only three cylinders contributing to power like a petrol with a dirty spark plug. Runs like this but switch off and restart once, twice maybe three times and then it's fine. Grateful for any help. Cheers Quote
ghr Posted June 5, 2011 Author Report Posted June 5, 2011 Connected up a Vagcom and got the following results: Vascom.doc Could the MAF fault reported be responsible for the Injector electrical fault reported? Many thanks. Quote
Floydey Posted June 6, 2011 Report Posted June 6, 2011 The wiring loom to the injectors sometimes suffers from poor contacts resulting in a misfire to one cylinder. This is located inside the rocker cover. It is connected to the cylinder head with a multipin plug. One turn will disconnect this. It may be simply this plug. Otherwise you will have to take off the rocker cover to gain access to the loom and it's connections to the injectors. Good luck. Quote
ghr Posted June 6, 2011 Author Report Posted June 6, 2011 The wiring loom to the injectors sometimes suffers from poor contacts resulting in a misfire to one cylinder. This is located inside the rocker cover. It is connected to the cylinder head with a multipin plug. One turn will disconnect this. It may be simply this plug. Otherwise you will have to take off the rocker cover to gain access to the loom and it's connections to the injectors. Good luck. Thanks for that. I've borrowed the correct security torx driver from work and was going to try cleaning the MAF tonight but will now check the connector continuity first. I suppose the connector is at the back...you know..some Godforsaken place where not even the three armed long fingered Ford mechanic can get to. Cheers again Quote
Floydey Posted June 6, 2011 Report Posted June 6, 2011 Looking into the engine bay the multiplug is on the right had side of the rocker casing near the front Quote
roy202 Posted June 6, 2011 Report Posted June 6, 2011 Hi i had this problem and turned out to be the injector loom in the head, think i had to remove exhaust manifold to get the rocker cover off as there are bolts i couldnt get to at the back. fitted new loom and job done, Quote
ghr Posted June 6, 2011 Author Report Posted June 6, 2011 Disconnected the Rocker cover plug and checked the connections, gave them a tug and they all looked sound. The MAF connector wires were also sound. I didn't check electrical continuity as I didn't know where the wires end up. Removed the MAF and the plastic was bit oily. Sprayed it with isopropanol and let dry off and then refitted it. Headed off to the motorway. Definite improvement. Still the chug-a-chug-a-chug...... but the acceleration at higher speeds is much better. Pulling away and accelerating from standstill much chug-a-chug but once the revs increased then it speeds up quite well. Noticed that the MPG display drops to 8 mpg when accelerating from a standstill. Although taking much longer to get there I got to 90 just and left it there for about 5 miles (mpg 25). Does it sound like the MAF? Just going out to try the Vagcom again. Thanks for your help. Quote
ghr Posted June 6, 2011 Author Report Posted June 6, 2011 The previous Vagcom MAF sensor error has now disappeared but the electrical fault on the injector still shows. Looks lke the rocker cover is coming off the weekend to check the cable. Are injectors easy to get at if necessary? I don't suppose the fuel supply could be clogged to one injector could it? Quote
ghr Posted June 6, 2011 Author Report Posted June 6, 2011 Hi i had this problem and turned out to be the injector loom in the head, think i had to remove exhaust manifold to get the rocker cover off as there are bolts i couldnt get to at the back. fitted new loom and job done, Thanks Roy, Floydey, I bow to your experience and will check the connections to the injectors. Is a new loom expensive or can it be repaired? Quote
ghr Posted June 10, 2011 Author Report Posted June 10, 2011 You know that big plastic tray under the engine that catches all the dropped screws and 10mm sockets? How do you remove it? Quote
ghr Posted June 10, 2011 Author Report Posted June 10, 2011 You know the big plastis tray thing that catches all the bolts and 10mm sockets? How do you remove it? Quote
chrispb123456 Posted June 10, 2011 Report Posted June 10, 2011 4 bolts 2 nuts.10mm socket and long extension Quote
ghr Posted June 10, 2011 Author Report Posted June 10, 2011 10 mm socket? Thought so. Neighbour gave me a magnet which I jammed into a length of white pvc oval conduit. Got them all out. Attached a picture of one of the connectors in the rocker cover. How do I disconnect this? Don't want to break it if I can help it. Does it just pull out? Quote
ghr Posted June 10, 2011 Author Report Posted June 10, 2011 Got the loom out. I managed to get the bolt in front of the EGR valve out with a flexible coupling but it was more luck than anything else. The real pig is getting the loom out. A metal clip came off and teetered on a ledge in danger of dropping to the depths. Second use for the magnetic pick up tool. There is a long plastic conduit which carries the wires and you have to feed this and the plugs through a series of narrow hole and also pinch together the metal clips. I found that there is not enough room to get it out without removing the battery and undoing a couple of bolts to loosen part of the plastic enclosure that separates the battery from the rest of the engine. Unfortunately I didn't do this to get the loom out and it cracked. So hopefully I can get one tomorrow or in the next few days and refit it. If this doesn't do the job I may as well get a new MAF as well. Thanks to the forum and for for all your help. Quote
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