If you manually add fuel to the intake, will it start?
I.E. spray starting fluid into intake or add some gas via Power booster hose
If it starts then dies you have fuel problem
If it doesn't start then you have a spark problem
That's the 50/50 test, tells you alot.
The 3rd reason a gas engine won't start is low compression, this usually isn't a sudden thing unless timing chain/belt breaks but you would know if that happened in a 2.9l
So I would rule out compression issue unless you think that is something to look at.
That's the big 3 for gasoline engines
TFI system was marginal when new, so at 28 years old it is always suspect with any engine problems.
Good read here on testing TFI: http://www.therangerstation.com/tech...agnostic.shtml