p38 2.5 diesel economy? lol

well it seems this is common to more than just my p38,all the ones i have heard when they throttle off it runs on 5 cylinders,sounds like a bag of ****, must be a fuel saver,were these the first to drop cylinders,must record it as for a modern vehicle what a step back just need the moggy mionor wheeze out the exhaust and the mini whining gearbox ahhhhhhhhh nostalgia.

If it does it is the first for me....

I know the BMW 8 Series used to shut down a set of opposed cylinders to save fuel so for the 840 it closed 4 cylinders and ran as a V4 and the 850 shut down 6 cylinders and ran as a V6....

I have never known a Diesel to do it....but I could be wrong.

Nah, mine works on all 6 all the time... My old man has the Lancia Lybra with a 5 cylinder 2.4 JTD engine, now that really sounds like something is horribly wrong with it... But it's not. The TDS is a happy kitten compared to that

chort said:

Nah, mine works on all 6 all the time... My old man has the Lancia Lybra with a 5 cylinder 2.4 JTD engine, now that really sounds like something is horribly wrong with it... But it's not. The TDS is a happy kitten compared to that

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but are you sure you have not got a faulty one,i have heard at least 6 that as soon as they throttle off they sound as tho it is running on 5.

Maybe you need an earing test.

Roddy, the engine is the only thing that works as it should on mine But still, there aren't that many around here, i've only heard two.

Another thing that bothers me is the problem for the engine that shutting down one of the cylinders would do. The inline 6 is firing three cylinders per revolution, in sequence of 120 degrees, so every one fires alone. AFAIK the engines that shut down the cylinders have more firing at the same time, and shut down those. Mind that i could be really wrong

As far as I can see there is no way it can shut down individual cylinders, the FIP is a simple mechanical pump with electronic control added but it can't shut individual cylinders.

Datatek said:

As far as I can see there is no way it can shut down individual cylinders, the FIP is a simple mechanical pump with electronic control added but it can't shut individual cylinders.

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You're right it can't. It's a union pump one out all out.

common fault whatever it is,still waiting for it to go completely, i am convinced it is the fip, but could be no4 injector, ain't replacing pump til i really have to.

roddy4 said:

common fault whatever it is,still waiting for it to go completely, i am convinced it is the fip, but could be no4 injector, ain't replacing pump til i really have to.

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If there was an injector fluffing it can't be the pump. Number four can give a wrong start of injection reading. But the pump cannot deliver less to one injector than another. If an injector is fluffing it's the injector that's duff.

roddy4 said:

but are you sure you have not got a faulty one,i have heard at least 6 that as soon as they throttle off they sound as tho it is running on 5.

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They must've all been knackered, mine runs just fine on all 6. Linkage.