injectors

[shawnxj]

So the ford 24# injectors were way too big and I couldn't turn the pressure down far enough to make them work. So if I take my 19 pound stock injectors and turn them up to 44 or 45 pounds do yo do you think that would work? I'm concerned that if I turn the pressure to high it'll damage them

[grainofsalt]

I don't think that 10 psi over stock would be a problem, I'm no expert tho.

[SilverXJ]

I think they will be fine. Considering that later model Jeeps use 49+ Psi.

[grainofsalt]

If I remember correctly there was a TJ that had 60 psi. I don't remember the year tho.

[shawnxj]

i'm more concerned with taking an injector rated at 39 psi and pumping 45 to 50 psi through it and it breaking

[SilverXJ]

Its not like you are trying to push 100 psi though them. It won't be a problem.

[Muad'Dib]

So the ford 24# injectors were way too big and I couldn't turn the pressure down far enough to make them work. So if I take my 19 pound stock injectors and turn them up to 44 or 45 pounds do yo do you think that would work? I'm concerned that if I turn the pressure to high it'll damage them

How did you determine they were too large?

I also have a RENIX (your profile says you have an 88) and I also found that 24# injectors were too large. I ended up taking my stockish 18.25# Ford Mustang injectors and turning up the fuel pressure to 48psi. This made them effectively flow at 19.2#.

[shawnxj]

when i installed the 24# ford injectors i set the fpr at 43#'s and the wideband was jumping between 10 to 12 at idle until i turned them down to about 35#'s and it would jump from 16 to ---. i would adjust about a 1/2# at a time and give the jeep 4 or 5 minutes to run to get used to the new pressure but it just didn't seem to like those injectors

interesting bit of trivia my stock renix 19# injectors are the 4 pintle

[shawnxj]

well it likes the 19# injectors better but idle is low...around 400 and it still won't rev over 3000. changing the tps did nothing

[shawnxj]

checked my distributor indexing again and it's dead on. i moved it 1 tooth back and it ran like crap and the rotor was way in front(counter clockwise) of the #1 post. really don't understand why it's losing spark and fuel at 3000 rpm

[Cheromaniac]

If I remember correctly there was a TJ that had 60 psi. I don't remember the year tho.

The '05-'06 4.0L TJs run a fuel pressure of 4 bar (58psi).