Novak Conversions Jeep Wrangler YJ radiator

4.0 only runs for a couple seconds

PNW Rob

New Member
Joined
Mar 14, 2026
Messages
1
Location
Washington
Took about an 80 mile trip and died while on the freeway. It had been running fine up until then. I found that I cannot hear the fuel pump when ignition is turned on and no fuel coming from the schrader valve. I removed the fuel pump relay, jumped the pins and heard the pump humming and got fuel to come out of the schrader. Replaced the relay and same issue, no fuel pump sound and nothing coming from the schrader.

I've already replaced the fuel pressure sensor, the TPS and the air idle control valve. The fuel pump (Omix brand) and fuel filter were replaced a couple years ago, probably only 5 or 6k miles on both. Any ideas?
 
Novak Conversions Jeep Wrangler YJ radiator