What is this relay and can it cause engine to die?.....

[Archaeor]

'89 4.0 4x4/manual.   What is this relay next to the ballast resistor? It looks melted on the bottom. I'll start the motor, it will idle just fine and then die after three to ten minutes. I've replaced the ballast resistor, same problem. Could the relay be the problem? It ran fine last winter. Also, is a vacuum hose missing on the vacuum valve below the resistor? Thanks.......

[eaglescout526]

Looks like an E-fan relay. Probably for AC. 

[fiatslug87]

Yes, fan control relay and it does not look like you’re missing a vac line. That’s the EGR solenoid which has a plug on one port of the vacuum line.

[Archaeor]

Thanks for the info.  So, if the fuel pump ballast resistor is good, what else would cause the engine to die? It doesn't sputter, just stops running.

[eaglescout526]

If I had a 4.0 with the ballast. I wouldn’t run it it all. Bypass it and be done with that thing. All it did was quiet down the fuel pump for the XJ. 

[pizzaman09]

Does is restart right a way or does it need some time to come around before it will restart?

[Archaeor]

It will restart right away, run for a few minutes then die again.  I'm thinking maybe a fuel delivery problem like the fuel filter. or the pump. I also live in the mountains and have had rodents, spiders and wasps etc. live under the hood, but not for a few years since I got a couple of mousers. It ran okay last winter, and no recent sign of critters under the hood.

[jdog]

Hook up a fuel pressure gauge to it and watch it when it does, if it drops to zero it's a fuel issue