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K series overfueling
matty h - 14/5/13 at 07:13 PM

I have a 1.4 rover k series striker but it is running rich, it is runing mems 2j with obd2 port which I have had a diagnostic tool plugged into, it found no faults and I carried out full function tests and everything worked as it should.
On removing the plugs cylinder number 4 is running rich or not burning correctly as the plug was wet with fuel.
I have chaged the injector and swapped the plugs around as well as checking for a good spark.
I am trying to get a comprestion tester that I can screw in.
Anyone got any ideas.

rusty nuts - 14/5/13 at 07:26 PM

Coolant temperature sensor fault perhaps

matty h - 14/5/13 at 07:29 PM

Thought that myself but diagnostic tool said all was well and problem only seems to be on cylinder 4.
Matty

rusty nuts - 14/5/13 at 07:44 PM

Are you sure the plug is wet with fuel and not coolant. The standard inlet manifolds can leak coolant into the inlet port due to a leaking manifold gasket which isn't always obvious , it can , in bad cases cause bent con rods due to a hydraulic lock. If the compressions show up low on the cylinder that's causing the problem it could explain why the plug is black due to incomplete combustion

britishtrident - 14/5/13 at 08:16 PM

With an injection system anything that stops the plug from firing will result in the plug getting wet.
As already by matty h the inlet manifold gasket on cars with plastic manifolds is prone to both vacuum and coolant leaks on either of te end cylinders, Rover introduced a modified gasket ("the green gasket" around 1997/98 and also modified nuts & studs and revised tightening procedure.
****If the car has a a dizzy replace the cap and rotor arm these were frequent problem on pre-2000 Rover engines.*****
It is also worth checking the MEMS unit has a good clean earth to the body, this a known problem particulary on the 200 and 25 where the ecu earths to the bonnet landing panel.
A compression test might tell you something but looking at the live sensor data from OBDII might tell you something

matty h - 16/5/13 at 06:54 PM

Done a comprestion check, all good around 14-15 bar each.
I am rather puzzled now.
Only thing I can think now is HT lead breaking but have checked spark and resistance of the leads.
Matty

britishtrident - 16/5/13 at 07:06 PM

quote:
Originally posted by matty h
Done a comprestion check, all good around 14-15 bar each.
I am rather puzzled now.
Only thing I can think now is HT lead breaking but have checked spark and resistance of the leads.
Matty



Is the engine on coil packs or a dizzie ? MEMS2.xxx can be either depending on what vehicle the engine is fitted to.
An HT spark in open air means very little as under compression the HT voltage required is much higher.

If the car has a dizzie change the cap and lead, if the car has coil packs cchange the coil pack and lead both are very common Rover problems.
Also note K16 engines with dizzies require a narrower spark plug gap from that specified for engine with coil packs.

matty h - 16/5/13 at 07:10 PM

Thanks for the help I have fitted a new dizzy cap and rotor arm so probably need to change the ht lead.
Thanks Matty

matty h - 25/5/13 at 07:31 PM

Changed the leads then the car would not start seemed would try to turn over but starter motor ws stalling,took the plugs out and turned over and water came flying out number 4 cylinder.Head gasket gone.
Has been sorted now with an new gasket and slight head skim.
Matty

britishtrident - 25/5/13 at 08:20 PM

quote:
Originally posted by matty h
Changed the leads then the car would not start seemed would try to turn over but starter motor ws stalling,took the plugs out and turned over and water came flying out number 4 cylinder.Head gasket gone.
Has been sorted now with an new gasket and slight head skim.
Matty


You could have saved yourself a lot of work
I think it is much more likely Inlet Manifold Gasket was leaking -- as was suggested earlier in the thread.





[Edited on 25/5/13 by britishtrident]

matty h - 25/5/13 at 09:12 PM

Was 100% head gasket seen the gasket and where the leak was and reused the inlet manifold gasket as I fitted it new over winter.
Thanks Matty

rusty nuts - 26/5/13 at 06:13 AM

Not a good idea reuse an inlet manifold gasket on a K series IMHO, they are a known weak point and the cause of bent con rods