Problem after changing head on E30 325i

Post Sat Nov 18, 2006 7:08 pm

Hiya,

My mate has just swapped the head on his E30 325i tourer. The head he's put on has got re-profiled cam. His engine builder has assured him that the cam should not cause any engine running problems, however...

The head has now been fitted but on tickover the engine surges from between 800rpm to 2k rpm and the engine does not seem to want to accelerate.

Can anybody think what the problem is? He's checked all the vacuum hoses and electrical connections and everything seems to be ok?

Any help would be appreciated.

Thanks
Matt

Post Sat Nov 18, 2006 7:40 pm

sounds like an air leak some where. Is the oil breather pipe between the block and inlet sealed ok ?

Where are you in cambs.

Post Sat Nov 18, 2006 9:15 pm

I'd second that, definate air leak methinks.

Check the corrugated hose from the TB to the AFM, these are prone to splitting especially underneath out of sight.

Also a blocked breather as has been mentioned above would cause this problem.

Post Sat Nov 18, 2006 10:38 pm

Also the pipe from the face of the inlet manifold to the fuel presure regulator - mine pops off now + then and runs lumpy as fook!!

Post Sat Nov 18, 2006 11:10 pm

Fuel lines the right way round ?

Post Mon Nov 20, 2006 5:22 pm

just a stupid suggestion (i've done this myself) is the air flow meter plugged in?
i drove round for a few days like this it took a woman to spot it it was that daft!