Yeah, have the air mass meter's output checked. You should see about 175+g/s at 4500rpm ish minimum.
Also, make sure the inlet manifold is down tight and that the change over valves have not failed or have air leaks.
Leaky ijectors can cause this issue but so to can incorrectly fitted cam belt! Have it fault read. If there is a camshaft retardation fault present either the belt is on wrong or the valve timing variators have been refitted incorrectly. The cam shaft pulleys must be loose when tensioning the belt and this is often missed by garages and this can adversly affect the cam timing. Many of thes engines had the variators out as when the breather system blocks up (which it will) the engine forces oil out of the cam cover gaskets and the variator solenoid bases. On some engines the chain spacing on the 2 cams in each head for the variator can differ from one bank to another and be missed when re fitting.
Does it miss at idle at all??
|