This is XJ/MJ related, so here goes. I sold my '91 HO 4.0L AW4 Xj to a guy at work with an excessive crank time at startup. Probably like 5-10 seconds. He said that the shop he takes it to said fuel pump. I say the crank sensor. They say fuel pump because of the leakdown of the checkvalve, and the time it takes to build pressure. I said crank sensor, because when you cycle the key until the fuel system has built pressure(and the pump stops), and it still has the long crank time. Before I keep telling him to buy a crank sensor and am wrong...
So, who is right?
Rob L.