Sounds like fuel pump relay contacts not making up. My '89 Suburban
started taking about 15 to 20 seconds of cranking to start. (usually
took 2 to 5 seconds). It was worse when hot (100 plus degree air temp
and pulling a boat trailer). The contacts on the fuel pump relay
(mounted on the fire wall above the distributor) were pitted and not
making up. I was camping, so just burnished the contacts and it's
been fine ever since (8 or 9 years!!). The pump is powered via an oil
pressure switch when running, the relay just provides pump power at
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