What year?
Fuel starvation would be RPM
and load dependent.
Originally posted by fomoco:
This is the first tour/Zetec I've owned - it seems to fall flat at about 3800 RPM - no power, and won't even get past 4500. Oh - manual trans, if that matters.
- Static timing (timing belt)
- Exhaust backpressure (clogged CAT)
- MAF is a possibility
Originally posted by fomoco:
One thing I noticed is I can't run regular gas. It makes a horrible sound around 3800 - like it's a diesel engine. Alot better on 93 octane, but still no power.....
This is usually from a lack of EGR, but it may go away when you fix the other problem.
Have you actually tried to pull codes? 
