*** I posted this in general discussions, but this is a better place for it ***

I've been to a rolling road today for a power run, and it only hit 134bhp @5300rpm....

This is with a K&N panel filter, Ashley manifolds, and Ashley exhaust system.
(I was hoping for more like 170 with this set up, but there you go!)

The graph looks smooth until it hits 100bhp @ 3600rpm, then it starts going
up and down, at the same revs, the torque jumps about 15lbft, then goes
on a similar rollercoaster ride as the bhp line... Torque caps at 145lbft @ 4250rpm.

I'm getting good even compression, and the spark is fine, CO is running at 0.21%

The guy that did the run said it was more than likely the fuel warm up regulator....

Does anyone here know of anything else that might be causing this?

!!! DEPOSIT KNOWLEDGE BELOW !!!
Help an ageing V6 perform to her potential, please.