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Old 1st February 2018, 10:12   #41
KenR
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Just out of interest, how would one unplug and remove an injector?
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Old 1st February 2018, 11:14   #42
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this does not make any sense. If you remove one spark plug lead, you only disable the plug that is connected to that lead.
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Quote:
Originally Posted by murphyv310 View Post
Hi Ken.
The 1.8 K series in the 75 and other Rovers only have two coil packs. It uses a "Wasted Spark" system, in other words one end of the coil goes to one plug and the other end to another, what happens is one plug fires just before TDC on the compression stroke and the other in the exhaust stroke on the opposite cylinder and vice versa same with the other coil.
The problem here is if you pull a plug lead off then you'll be disabling two cylinders and it then gets confusing.
......
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Old 1st February 2018, 19:18   #43
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If the coolant sensor was broken or its signal was lost, the high speed cooling fan would start at ignition on. Since you haven't mentioned the fan, the ECU is receiving a temperature signal signal. The question might be asked, what signal (temperature)? You might run the Trip Screen Diagnostic Routine without starting the engine and checking what it says about coolant temperature.

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Old 1st February 2018, 20:10   #44
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I'll run it tomorrow and report back. Don't the diagnostics give a reading for the injectors too or did I imagine that? . Just out of interest, how is the fan operation linked to the rough running and other related skullduggery?
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Old 2nd February 2018, 09:31   #45
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Okay, decided to run the car up to temp this morning irrespective. Que tons of 'emissions' out of the exhaust but, when up to temp an idle was obtained. Still doesn't sound quite right but much better and as I said, it seems to hold a steadier idle at normal revs.

The seepage from the exhaust manifold was more so, not gushing but now involving two spots on the right hand side of the manifold as you look at it from the front. Wet stuff dripping down therefore cannot be oil as the stuff should have combusted given the amount on there and the engine temps involved, ergo..... coolant. No major coolant leakage seen anywhere else.

I had a better look at the nuts holding the inlet manifold in place and I swear two of the three 13mm nuts looked a little 'moist'. Two of them actually accepted some nipping up. Am going to lob some more petrol in the tank later, along with a bit of injector cleaner. Can't do any harm, right. The inlet manifold gasket will be fettled tomnorrow.
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Old 2nd February 2018, 09:55   #46
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Sounds like it's getting there.
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Old 2nd February 2018, 12:43   #47
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Hi, just reading this thread and you mention no3 plug fouled up, as another member mentioned, you need some diagnostics on the old girl.. compression test, possible piston ring stuck, T4 for sensor issues, intermittent coil fault, would save you a load of time.
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Old 5th February 2018, 12:42   #48
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Quote:
Originally Posted by kaiser View Post
this does not make any sense. If you remove one spark plug lead, you only disable the plug that is connected to that lead.
Surely.
Hi Kaiser.
You need to allow a return for the plug left in the cylinder to fire, so pulling one plug lead means there is no current flow. Ideally put a bolt or length of wire in the plug cap and ground it to the head etc, this will ensure the opposite plug fires.
I remember reading threads on occasions where a plug lead had been pulled on a 4 pot "K" and the engine only runs on two, also in the 2CV pulling one plug lead the engine stops.
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