ok i have a bosch 044 fitted to my cosworth and its got a really bad splutter as if on 3 cylinders but once its right up in the rev range it seems fine. ive noticed that when the ignition is switched on the pump only primes for a second not the normal 2-3 seconds is this normal? ive replaced the cps cts phase sensor (gapped correctly) new spark plugs genuine 071`s its running stage 3 msd chip 803`s T34-55 3 bar map sensor etc this car has had my life and all im doing is chucking money at it with no success! can somebody please tell me where im going wrong? thanks in advance!!

 

That doesn't sound like fuel pump at all, as long as the back of the pump is flooded then it will be fine, also the fuel rail is all at the same pressure so it would not miss one cylinder.

My personal and expensive opinion is new engine loom, standalone ecu and coils on plugs.

 

cheers for the reply mate yeah im trying to avoid the dreaded new loom but if it needs it then so be it. its as if its being choked on low down power very spluttery.

 

also on the fuel rail feed there is some sort of saucer shaped valve? can i remove this? what is it?

 

Can you take a pic of it? I expect it needs to be there.

Might be worth checking the correct spark plugs and gap specs along with cleaning all earths.

When I got mine I junked the lot and went with new loom.

 

Just take it to a specialist you have posted more problems yet again..

Save the hassle and time get it sorted before you have to build a new engine.

 

That is a good point, give it to one expert to fix, do it once and do it properly.

 

Hi

Always start with a few basic checks
Even so called profestionals some times slip up here.

Do a conpression test to make sure your engine is good mechanicaly before you get too technicial

If thats all good a fuel pressure test would be good---ok

Check all your multiplug conections

Make sure there are no air leaks and all the pipes are on the plenim

Check the Map sensor pipe and that there is no petrol contamination

Cheers Tim

 

Hi tim and thanks mate i will go over everything you have mentioned in the morning however i have good compression across all cylinders the map sensor is brand new but i must say it is an unbranded one. i will clean all connections too. Thanks.