XtrmTJ
Well-Known Member
Can anyone walk me threw a fuel injector (6) remove/install ? Special tools needed? Do's and Don'ts ? Tips to make it easy as falling off a cliff. TIA ! :awesomework:
I'm new here but I did this on my 97XJ a few months ago. E-bay has factory service manuals on CD; seriously, it's well worth the 30 bucks or so.
Go buy new injector o-rings (this is important). Disconnect the battery. Remove the schrader valve cap and bleed the fuel pressure from the fuel rail, a screwdriver and rag will do the job. Label, then remove the injector plugs (whiteout pen works great). Remove the clips that retain the injectors on the fuel rail (they only go one way and a screwdriver works). I believe 4 bolts secure the fuel rail, remove them. Yank and wiggle up on the fuel rail, evenly if possible, the injectors may or may not come out with the rail. Some of them will be remain in the intake a little wiggling and pulling will be necessary to completely remove the injectors.
Upon installation, the manual says to coat the o-rings in motor oil, I have used fuel lube or vaseline with similar effects.
If the clips are there holding the injector to the rail, they should come with the rail.:awesomework:
Yup, just pull the rail and injectors as an assembly and set the rail on a bench...just did my XJ last month...done in less than an hour.Yeah............ok , Not to be nitpicking:fawkdancesmiley:, in hindsight they're probably easier to pull from the intake rather than the fuel rail.
If you're replacing them, go with a set of Bosch's from a 4.0 explorer...much better injector, and a little more flow rating (noticed a bit more power (at least compared to the ones that were in my 89 XJ...)...
FWIW, you put 19lb/hr injectors in place of the stock 18.6lb/hr injectors in your '89 XJ, which is fine and is a common upgrade. Anything '91+ in a 4.0 is a H.O. motor and uses 21lb/hr injectors.
J
TY ! I was getting an error code says an injector was misfireing ? Got a set from Precision Auto Injectors, they say better starts, smoother idle, better throtle resonce and more mpg's. ALL that for 129.99 to my door ! :cheer: I'll put them in this weekend and let ya all know how it turned out. :hi:
Error Code # 43 Peak primary circuit current not achieved with maximum dwell time. Misfire detected in one or more cylinders 1 thru 6.
Along with 12 and 55. 12 is battery disconected from PCM in last 50 starts and 55 is end of error code check.
Hope is that new/remanned injectors will end this error code.