It's would be an unusual problem.
But, check the vacuum guage reading at idle.
Carb or fuel injection, it should be @ 20 in. Hg.
The valves may be tight due to misadjustment.
Is the distributor timing spot-on?
Sometimes the settings are sensitve.
Is compression important?
I discovered a problem with a 3.0 mazda MPV engine.
The timing belt was not adjusted properly with respect to the cam marks on the cylinder heads.
After this the engine accelerated impressively.
If the motor was sabotaged, a compression reading would indicate problems.
Is the compression good?
Barring sabotage or poltergeists, it may well be a timing problem.
Fuel filters, clogged exhaust, clogged air filters, etc.
The computer is only programmed to tell you what the factory wants you to know.
An interesting engine and problem.
Considering that the Triton V-10 couldn't possibly handle the 2000 hp. Requirements of a V-12 Mercedes engined Stuka, or Messerschmitt; nor fire through the crankshaft, one wonders how far technology has come.
So, check the basics like compression, vacuum, timing, etc.
I'm not a mechanic, but sometimes simple things are the cause.
Hopefully I was helpful.
Monday, July 30th, 2007 AT 1:21 PM