Rockinrowley

I have a 1995 classic when you drive it normally it runs fine but if you drive it hard it can drop its revs all of a sudden as if there is not enougth fuel getting through ?? if you let off and then put your foot down again its fine until you drive it hard again - please help ?????

myblackwrx

iTrader: (1)

Do you mean a violent cut off nearly putting your head through the windsceen?

Rockinrowley

exactly that it almost put me through the windscreen is it a fuel pump issue ??

joz8968

iTrader: (13)

Yes, the ECU will all of a sudden cut fuel to the injectors if it senses there's somrthing wrong. When this happens, does it occur when the engine's cold and you've tried to boot it using boost or, perhaps, when hooning round corners when low on fuel e.g. 1/4 of a tank or less.

These are jus a couple of classic scenarios when this phenomenon happens...

myblackwrx

iTrader: (1)

That wuld be fuel cut.
Check the intercooler pipework and boost hoses for leaks to start with.

Rockinrowley

it seems to do it more when cold, not so much when going around corners - I have had the car for a couple of years and ran without fault this only started happening a couple of days ago - i will check all of the pipes and hoses - shall I just check everything is tight with no splits ?? - if everything ok would that siggest it was a fuel pump ?/

myblackwrx

iTrader: (1)

check pipes are connected,not split and connected properly.

Check the bottom hose off the boost solenoid (drivers side suspension turret) as it should have a restrictor pill in it

Boost Solenoid Plumbing

Do you know if the car has been modded in any way (induction kit,decat etc)

Rockinrowley

thanks for that, it has a decat pipe, back box and dump valve all came with the car when I bought it

myblackwrx

iTrader: (1)

Well check all the pipes you can especially the dump valve.
How long has it been overboosting?

Rockinrowley

about 2 days ago ran fin up until then, I am going to check all the pipes e.t.c and have just ordered a new fuel pump anyway as the current one is a standard one and looks to be original.

Its strange as the problem occured on Friday and then I drove it again later that day and quite hard around some back lanes and it was completely fine, got in it saturday night after it had been stood and it started misbehaving again after only a few minutes -I have not used it since.

joz8968

iTrader: (13)

You really shouldn't be attempting to boot it when the engine is not upto normal operating temp - not good for turbo and engine. Wait until at least the water temp needle gets to its normal postion - about a needle-width below halfway i.e. when it doesn't rise any futher.

Even then, it's best not to hoon until you have driven from this point on for about 10min more!, as oil takes a longer time to reach its own normal operating temp, when compared to the coolant...

Rockinrowley

Hi I always let them warm up correctly but this problem is occuring when its up to temp

joz8968

iTrader: (13)

In that case, if you're happy to rule that out, then follow myblackwrx's advice above... Chances are a pipe of the BCS has popped off/split badly