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Old January 8th, 2021, 16:14
CRBMAN CRBMAN is offline
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OK guys, A buddy and I just purchased an 01 xj with a blown motor. He wants the donor jeep after I pull a few things off it. It has an after market billet aluminum fuel rail and Bosch 4 hole injectors. I have no idea how long ago they were installed. I've already pulled them off and they look good . However, is there a way to test them before I install them on mine? They physically look good and all the o-rings look good. Or do I just hit them with some carb cleaner and go for it? Also, is the fuel rail really an upgrade, or just eye candy?
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Old January 8th, 2021, 18:04
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XJCreeper XJCreeper is offline
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Re: Injectors

This guys has a pretty good way of doing it with a battery, couple wires, rubber hose and a can o carb cleaner.
I've done this before to test if an injector was good.

I had a couple dirty ones. I've got Ford 5.0 injectors in there now.
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Old January 8th, 2021, 19:26
CRBMAN CRBMAN is offline
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Re: Injectors

Thanks for the info. Think I'll try it.
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Old January 9th, 2021, 10:00
Black1990jeep Black1990jeep is offline
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Re: Injectors

there are write up on the four hole verses stock. Some say the four hole spray pattern has issues, others swear by them. some folks who say these i jectors are golden cure alls, probably think so cause they replaced bad injectors with good four hole injectors.

If your injectors are running ok now, I see no reason to change them at this time, else it is eye candy or bragging rights. Unless you got a bad injector now, you likely wont notice any improvement. if you suspect dirty injectors, run a bottle of fuel tank injector cleaner thru the system. I run the chevron cleaner thru at least once a year on my injected cars as a preventative
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