Taurus V6-232 3.8L (1989)
3.
Compare the deposits with the Intake Valve Deposit Rating System Chart, Figure 1.
a.
If either of the intake valves appear to have a carbon deposit level of 7 or less (lower number rating), intake valve cleaning is required.
b.
Proceed to the IVD Cleaning Procedure.
4.
If no carbon deposits are seen or the deposit level is 8 or cleaner, the drive concern may be the result of low volatility fuel. Refer to TSB 91-8-13
and proceed to Fuel Recommendation.
CLEANING PROCEDURE
NOTE: