Vapor Lock/Bonehead admissions

[Mark Woodland]

Hello listers
After replacing the fuel distributor and injectors on Max ('87 5KTQ), I
didn't replace the rubber boot over the injector lines, or the injector
cooling fan's hose(ripped) and injector air diffuser plenum (cracked/broken/
disintegrated on removal).

All was well until June, when it began no-start conditions when hot. Between
battery ailments (it was in the process of dying)and home/work demands, I
just shelved the whole issue, putting only the odd hour or so into diagnosis
every week or so.

After replacing the battery, and getting it  ready for state inspection.
its finally dawning on me that its probably vapor locking, as it has always
started from cold, and always failed after being warmed up, then shut off
for ten minutes.
Questions:
1. Does the rubber injector line boot need to be refitted?
2. Does the vapor lock diagnosis sound plausable?
(Anybody out there have a decent used air plenum for the injectors?)
I just find it hard to believe that the injector cooling fan can bring the
injector temps down when the block/head temps are so high.
I suppose that I should know better.. its all there for a reason.
Duh
Mark


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