gsmith
NAXJA Forum User
- Location
- Shingle Springs CA, 95682
Have 96 XJ recently was idling in driveway and just died. Wife calls me up I go home and check fuel pressure at the rail. There is none. So as hot as its been in Nor-Cal lately I assume the fuel pump was done since she always runs it low on fuel. I replaced pump and filter only to find it still wouldn't start. I never checked spark at first since there was no fuel no bad relays or maxi fuses. I instantly figured bad pump. Well after that it still would crank and not fire, I then checked spark to find there was none. So the next logical suspect was CPS. I checked it through the helpful advice and specs found here and it was bad. Replaced it and it fired instantly. I dont mind doing the pump and the filter was necessary as P.M. My question is, will a bad CPS cause the fuel pump to not get power and run with the key on? I am just curious and also thought maybe it would help someone else from mis-diagnosing the same problem.