Join Date: Jan 2000
Location: In the process of finding it
Thanked 1 Time in 1 Post
Driving me nuts.
1985 4.2L CJ7 with Hesco MPI (1994 YJ converted to fit 4.2).
Been having cut-out, etc in hot weather.
Elec. Fuel Pump
Lines to filter from tank
Checked tank, pickup, float, all good.
Re-positioned fuel pump lines to go on passenger side, to avoid exhaust on drivers side. Lines are good, not crimped. Pump is high, near the wheel well.
Problem: Sometimes when I start it, it seems to take a long time to get fuel pressure. There is gas in the line at the rail fine, and the pump sounds like it is pumping air for the 20sec it takes to get the fuel pressure to raise.
Question: Anything create air in the lines up to the pump intermittently? I parked it last night for an hour and it took 20 sec to get pressure. I Started it this morning and instant pressure, it jumped to 10psi when the computer ran the initial pump when the key is tuned to on.
1985 CJ7 T.H.O.R
"He brought me up out of the pit of destruction, out of the miry clay, And He set my feet upon a rock making my footsteps firm."