mk3 2.0 8v poor acceleration

[golf8v]

hi guys and girls, i have a mk3 gti 8v just lately it has no accerleration from 3/4 to full throttle it drives well had dont miss a beat just really flat can any one help plz

[Khare]

More details please.

What do you mean no acceleration from 3/4? Does it misfire, or what? Maybe the cable not opening the throttle body properly?

[golf8v]

its moving full thottle ok, just car is holding back like theres no power

[dom]

I've said it before and i'll say it again, it's a Mk3 - deal with it

[thai-wronghorse]

Yeah, could be a sticky accelerator cable or throttle body butterfly. Are the revs cutting off at any particular point ie. 5000rpm?

[thai-wronghorse]

How long have you had this car, are you familiar with mk3 Golfs?

[golf8v]

no just had loads of mk2 golfs, yes 5000 would be where it gets flat

[thai-wronghorse]

Generally when a mk3 cuts off at 5000 rpm it means it has gone into 'safe mode', have you changed the timing belt or had the timing adjusted recently?

[golf8v]

no nothing done, it was running sweet but decided to go flat on me

[Khare]

To be fair, an 8v won't go much more after around there...

This is a standard engine graph




As you can see torque drops a lot, and after 5500rpm the HP falls too.

And now this is the same engine with a rally spec cacmshaft and some mods



Torque still drops a fair amount, but it holds peak HP for a little bit longer.

8v's don't really like to rev...

Generally when a mk3 cuts off at 5000 rpm it means it has gone into 'safe mode', have you changed the timing belt or had the timing adjusted recently?

If the limiter kicks in at 5000rpm then yes, but if it revs above then no...