help!!!

My 89 Golf gti cab Karman has a acceleration problem! :dontknow:  have recently replaced the Fuel tank, out of tank fuel pump, 4 new injectors, all filters, cap and leads, all spark plugs and changed the fuel metering unit!   When accelerating the car starts spluttering and then loses power.  If I turn the ignition off then on the car springs back into life but accelerate and problem is back again!   My mechanic just cant help me :roll: any ideas :dontknow:

It does sound like fuel starvation, check the fuel lines from pump to the engine bay for blockages.

Okay! have got the car ticking over so the metering unit seems fine, all the hoses and fuel lines have been blown throu and are clear , Both fuel pumps are working:?  and the wring seem to be in good order!  
But on accelaration there seens to be some kind of fuel starvation am about to check the Injectors are clear today :dontknow:

Anybody any ideas :dontknow:

There is a good injector test >>HERE<<

Are your fuel filters clean? Have you any debris in the fuel tank?  Is your filler neck in good order?

was fine! then took out a few times! mis fireing a little, starts great but reving a bout 1600.

at least it is running. a little spluttery thou? :dontknow:
shift like a bugger now!!!! acceleration is gud.  occasional splutter! xxx :wink:

Fires need 3 things to burn properly - fuel, air and a source of ignition.  Your engine is no different.  

Have you checked the coil?  I drove to an MOT one day but couldn't drive back - the coil just packed in, and gave symptoms much as you describe.  The Bosch ones seem to work best.  Some of the alternatives are really poor quality and don't last.  If the ignition module isn't clamped to its heatsink properly it can overheat and give a misfire, but it would take quite a while to get hot.

I knew someone who overtightened the air tube jubie clips from the metering head to the inlet manifold which distorted the tube and let stray air into the engine.  That will make it run rough too.  Did you have to adjust the mixture to get it to idle ok?

Good luck - Big