Can having the wrong year distributor cap cause a GMC Jimmy not to start?


Asked by Mar 10, 2015 at 08:15 AM about the GMC Jimmy

Question type: Maintenance & Repair

I have a 1993 GMC Jimmy with a 1996 or 1997 engine, I asked the guy I bought it
from and he said that he couldn't remember what year the engine actually was. I am
leaning towards a 1997. Anyways, a few months ago I was riding down the road and
my truck started spitting and sputtering, it was kind of like a jerking motion.
Eventually it cut out completely, I waited a few minutes and tried to crank it back up,
it cranked and I made it about 1/4 a mile before it cut out again. I managed to do this
over and over until I could get it to my house. I replaced the fuel pump, fuel filter,
distributor cap, coil pack, secondary coil pack, air filter, both ignition relays, the fuel
harness has been rewired, and the O2 sensor... Then I found out that the engine was
a 97 not a 93. Could these parts being the wrong year cause my truck not to start. It
will crank it just won't turn over. Please any help will be greatly appreciated, I have
been dealing with this truck since December of 2014 and it still isn't fixed. And I really
don't want to get rid of it.

1 Answer

Andrew Olsen

93 and 97 4.3 engines were very different. They don't really interchange. The biggest thing is the heads and intake. Your 93 harness will only plug into a 93 distributor. Both distributors can be put into each motor but the wiring and ecu are different

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