newly rebuilt long block will fire but won't run

[charlesd22]

I have an 85 xj with 2.8L Just put a new rebuilt long block in it. It will fire but it won't stay running. I have spark, and great compresion, anf the carb definitely shoots fuel. Can anyone help me?

OH YEAH, i DON'T WANT ANY OPINIONS THAT SAY ANY THING ABOUT "YOU SHOULD OF PUT A 4.0 IN THERE"

[churky89]

Are you sure all vacumn line are hooked up correctly?
Timing set?
Loose distributor?
Plug wires on right?
Hope it turns out to be somthin simple.

[HossHoffer]

Just for starters check your float level. The timing may be off also. Can you smell unburnt fuel?

[WebEditor]

Fuel pressure... when I put in a new 2.8 in my old XJ I was flooding it and I had to put in a manual pressure regulator which allowed me to drop down the pressure.

Kejtar
P.S. You should have put in a 3.4 in it :) it's a drop in :D

[charlesd22]

Timing is correct
Vaccum lines have been checked and rechecked

Iwill absolutely check the float and fuel pressure

thanks for quick replies guys

[Matthew Currie]

Does the thing have a ballast resistor for the coil? If so, check that.