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[Spanners_601]

After having fixed a small coolant leak from the back of the engine somewhere under the bulkhead with K-seal as no one could actually find it Ive developed a another problem.

The car drives perfectly apart from a strange power loss/misfire/shut down at 3400 rpm ?

If I put the car in neutral and rev it up to 3400 it just misfires away till it drops back down below these revs. Under this number it works perfectly no smoke, no excess water from exhaust full power etc.

So any ideas what happens at 3400RPM then that might give me a clue as to where to look for unplugged sensor, water contamination or failure etc.

Thanks in advance

PS. Its a W reg facelift Elite 2.5V6 auto BTW

[Peter H]

May be down to the dual ram thingy opening.

As you can tell I am a expert!

[cem_devecioglu]

May be down to the dual ram thingy opening.

As you can tell I am a expert!

 

second front one opens at 3400 RPM..

[markey mark]

for a start you should never use k seal in anything !! check plug wells for oil if so could be tracking or dispac knackered  

[Spanners_601]

for a start you should never use k seal in anything !! check plug wells for oil if so could be tracking or dispac knackered  

"K seal" I know its a last didtched attempt to keep it going as two garages reached "the couldnt be arsed, couldnt find it, your f***ed sell it" stage despite offering clues. Still it was my last hope and it did stop the leak Im hoping this is just something like dislodged connector or water contaminated wiring (althought the leak was well away from anything electrical)

So where is the location of the second ram air flap or the sensors involved ? - sounds like the right area !



Cheers again

[Martin_1962]

for a start you should never use k seal in anything !! check plug wells for oil if so could be tracking or dispac knackered  

I'd use it in a window if I lived up where they are based!

[ngrainqey]

i have a spare multiram if you need any bits matey!

[albitz]

The water leak was probably the heater bypass valve,it usually is.
It may have soaked the dispack which could knacker it and cause the misfire.although if it is happening at a point where the multiram operates it may be worth checking that first.

[Kevin Wood]

Is it rev limiting at 3400 or just hesitating?

if it's rev limiting maybe it's in some sort of limp-home mode. Have you checked the engine ECU for codes?

Kevin

[Marks DTM Calib]

Is it reaching a 3400rpm celing which it wont rev past or is it just (lol) miss firing through this small section of the rev range

[Spanners_601]

Its misfiring / dieing and dropping back down I really dont feel its a "clean" enough cut its not like reaching the rev limiter. It definatly feels like a fault condition not some sort of get me home mode. There is no fault warning light perminantly on and I havent flashed out the codes yet but may have time later today.

[Marks DTM Calib]

Its misfiring / dieing and dropping back down I really dont feel its a "clean" enough cut its not like reaching the rev limiter. It definatly feels like a fault condition not some sort of get me home mode. There is no fault warning light perminantly on and I havent flashed out the codes yet but may have time later today.

Its certainly worth a code read.....I assume the fuel filter was changed fairly recently?

No air leaks or pipes off after the work?