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Old May 1st, 2018, 12:34
lazyxj's Avatar
lazyxj lazyxj is offline
NAXJA Member #1310
Join Date: Mar 2004
Location: Los Angeles
Posts: 2,575
Re: Problems after 12 hole injection upgrade

Your scanner shows the evaporative system and O2 heater tests have not passed.
Neither is dependent on the injectors.

I have tried different injectors in several stock XJs.
IMO, most of the improvement people feel is the result of clean injectors, with a good spray pattern, compared to the old, dirty injectors they replace.
The factory supplied injectors are the right size for a stock engine.

It would be interesting to do side by side dyno comparisons between new, stock injectors and the newer injectors, with more holes.

Both XJs are still Real XJs
01 Sport, Russ Pottenger 4.6, AW4, 4" lift, 33 X 10.50 KM2, 4.56-8.25 TruTrac, D-30-E-Locker with alloy shafts, Hidden M8000 winch, Vanco front and ZJ rear disc brakes, Frame stiffeners, Lots of armor, Towing baseplate.
1997 Country, Mostly stock, 2" lift, Engine mods, NP242, Towing baseplate
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