2 possibilities:

1. Carbon deposits causing higher than normal compression.

2. Carbon deposits causing clogged EGR passages.


For #1, use Seafoam to clean.

For #2, use carb cleaner, brushes, and pipe cleaners to clear blockages.

"A young man who does not have what it takes to perform military service is not likely to have what it takes to make a living." - John F. Kennedy

Proud owner of an 88 Montero (with a blown engine).