Continual Problem

[Tazzy]

well ive had this problem for a while now, and everytime i think ive sorted it, i seem to of not have, ive spent alot of money on changing many parts from alot of different opinions and advice, well ive no more money to change anything else, this problem needs sorting

ive already changed the following...

Pipercross Air Panel Filter
NGK Spark Plugs
New Radiator
New Fuel Injection Pump Relay
New Fuel Pump
New Fuel Filter
New Mass Air Flow Sensor
New Crankshaft Sensor
New Lambda Sensor
New Thermostat
New Starter Motor
New ECU
New Clutch/Compression Plate/Thrust Bearing

the problem is that it wont rev past 4.5k rpm, it stuggle, which of course in fifth gear is 80mph

now today, it seems to of got worst, it now struggles at 3k rpm, which is an issue as im not going to be able to go on the motorway, cant really be doing 50mph now can i

what could it be? with numerous diagnostic readings, nothing is appearing, so it must be mechanical?

is it voltage? slipping clutch?

im out of ideas, its not like i redline it, mainly because i havnt been able to for a few years now, plus i live in birmingham, capital of traffic jams mainly because theres many re tards here that got their licenses from a cereal box :-)

1.8 20v non turbo

cheers ta, thanks very moochos

[T_J_G]

Ummmmm what car?

[Jin_C]

Was just about to ask the same, what engine?

This suggestion is pretty out there but could it be a very stretched throttle cable? Can you rev it higher if you manually move the TB yourself? (Assuming you have Drive By Cable)

[Big-G]

First thing to come to mind is fuel filter ? Changed it ?

[GTi_James]

horse in the back? 

have cleaned everything out? really bad boost leak? coils gone? any codes at all?

[Tazzy]

ah sorry, i knew i forgot something, oops

mk4 (obviouly)

1.8 20v non turbo  125bhp

ive also chance the fuel filter and fuel pump

i havnt tested pulling the throttle from the engine, ill try that tomorrow

anything else?

[navmk4gti]

I would think throttle body problem too

Can you rev it all the way when just siting idle?

[Tazzy]

nope, whether im stationary or moving, it does the same, it also idles alot at 1k, which, with a loud exhaust also, i get some evil looks 

[navmk4gti]

Hows your mpg? Sounds like maf or ignition amp

[Tazzy]

i do use alot of fuel, already changed the maf