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ordered ford19#injector for my 96xj will they work, help

M

mramr1974

NAXJA Forum User
Location
idaho
Like the title says i just order ford 19# injectors for my 1996 xj 4.0 after reading several post it seemed the way to go untill i came across a flow chart now i think i may have made a mistake. If you have done this swap in a 1996 or have some info pleas let me know here the link for the flow chart. http://www.jeep4.0performance.4mg.com/tech_specs.html. Any help would be welcomed the sooner the better maybe i could still cancel the order thanks
 
Ok, did you run the formula on your link?

(lb/hr) = (HP x 0.5) / (CYL x 0.8)

(lb/hr) = (190 x 0.5) / (6 x 0.8)

(lb/hr) = 95 / 4.8

19.79 lb/hr

This was a**uming an 80 % duty cycle for the injectors.

Looks like you are good to go.
 
Some peaple who are looking for a performance increase may be dissapointed, but the better spray pattern/atomization of the Ford injectors should be an improvement and your probably better off with a stock flow rate with a stock Jeep.
 
May be this will help.
injector-1.jpg
 
Rainman said:
May be this will help.
injector-1.jpg
Click to expand...

Nice looking form, with errors in it: there are lots of EV1 injectors with 4-hole disc nozzles, that feature didn't magically appear on EV6 injectors.

Also, not sure why the chart recommend 22.5 lb/hr injectors for a stock XJ 87-90 4.0 that uses 18.6 lb/hr OEM, the Ford (Bosch) 19 lb/hr injectors work fine and no, you don't need a newer fuel rail or pressure regulator to run Ford 19 lb/hr injectors on a stock 4.0 engine.

Also, you can run 19 lb/hr Ford fuel injectors on the 91-95 4.0 with no problems, even though OEM for those years would be 21 lb/hr, when you use the formula (lb/hr) = (HP x 0.5) / (CYL x 0.8) you get (lb/hr) = (190 x 0.5) / (6 x 0.8) or (lb/hr) = 95/4.8) lb/hr = 19.79 at an 80% duty cycle (the 0.8 in the formula) SO, you can use EV1 Ford (Bosch) 4-hole disc type nozzle injectors in your 4.0 engine.

May be good information in option 2, but no descriptions of what mods would need to be done to take advantage of the performance upgrades.

Like I said, nice looking chart.
 
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mramr1974 said:
Dont understand willit help no , It just needs to run normal the jeep there going in currently has no injectors and the ford19# are less exspensive. Could you clarify your responce
Click to expand...

Plus in your case with no injector! ( you didn't list this in your first post) Go for it.

I have never read any hard numbers of improvement. Pitting a ((((FRESH))))) SET of stock or stock type and a set of multi shooters. I mean real numbers not "she runs better with more pickup and I now get 3 more MPG. I think because I never really check my MPG before the mod " Or my ET or top end but I am sure it's all good.
Show me the numbers or until then! It's NO help.
 
Saying it isn't an improvement without numbers to back it up, is just as bogus as claiming gains without numbers, wouldn't you say?

Joe, they go into ponderous and confusing detail in the threads there at the bottom, under "More indepth info in these threads". They condensed it for a reason, I think.

edit- I tend to think there's a reason manufacturers use a 4 hole design instead of a single, and if I can replace less efficient injectors with a different design that work as well or better than OE, and are cheaper, I'd consider that an improvement, even if it's not a dyno proven power gain. I have no access to a dyno, and if I weren't concerned with doing things on a budget, I'd just take it to a dealer and have them throw stock replacements in- multiple dyno runs every time I did something would wipe out my budget in no time. The cost is probably why no one is posting hard numbers on injectors either way.
 
Last edited:
hubs97xj said:
Saying it isn't an improvement without numbers to back it up, is just as bogus as claiming gains without numbers, wouldn't you say?

Joe, they go into ponderous and confusing detail in the threads there at the bottom, under "More indepth info in these threads". They condensed it for a reason, I think.
Click to expand...

Yep, bookmarked those for future reading--I'm getting smarter every day!

My OEM and original injectors were so bad that drinking gas and P/ing into the intake would have been better than what I had. So, I don't make any personal claims for using the Ford (Bosch) 19 lb injectors in mine. That said, I believe the 4-hole disc type nozzle is superior to the single pintle, with the singular exception that the single pintle will pass bigger pieces of contamination that could choke off a disc type nozzle, and the 4.0 owners I know that have also made the change all claim a smoother idle, but that is anecdotal and so much depends on other factors.
 
joe_peters said:
Nice looking form, with errors in it: there are lots of EV1 injectors with 4-hole disc nozzles, that feature didn't magically appear on EV6 injectors.
Click to expand...

This are not EV1 but EV1.3, which have 4 holes but this not the whole story, the basic design is the same, the reaction speed is the inferior to EV6, made of two part which can leak or even break, made of metal that absorb heat...
And most important, EV1.3 should be used at a specific pressure, the pressure they were design to work at. EV6 can be used at almost any pressure.
The cone shape is also important, not just the flow. For that, Ford injectors are lacking and the Neon, 703, fit best.

joe_peters said:
Also, not sure why the chart recommend 22.5 lb/hr injectors for a stock XJ 87-90 4.0 that uses 18.6 lb/hr OEM, the Ford (Bosch) 19 lb/hr injectors work fine and no, you don't need a newer fuel rail or pressure regulator to run Ford 19 lb/hr injectors on a stock 4.0 engine.
Click to expand...

Well, you misleading, stock 87-90 Jeep injectors,53003956, are 240 cc/min @43PSi, Ford injectors are 210 cc/[email protected].
What you did is comparing Jeep injectors flow at 39PSi to Ford injectors flow at 43.5PSI, which is a fundamental mistake. Flow comparisons must be done at the same pressure.

Even so, you suggest using 19lb/hr EV1.3 where a 19.79lb/hr is needed, by your calculations. Which mean a duty cycle of more than 80%, this, in turn will cause injectors failure, lean condition at high rpm....

The stock flow at 39PSI is 234cc/min (91-95 Jeep), with the Ford 710, 19lb/hr @43.5psi (210cc/min), you'll get ( sq. rt.(39/43) x 210 = 198cc/min )
So, using 198 cc/min where 234 is needed is not wise. By using the 48PSI FPR with the Ford injectors the flow at 48PSI is ( sq. rt.(48/43) x 210 = 220.6cc/min ) which is more likely.
With the more efficient EV6 injectors it is safe to use a bit lower flow injectors, not with EV1 or EV1.3.

joe_peters said:
May be good information in option 2, but no descriptions of what mods would need to be done to take advantage of the performance upgrades.

Like I said, nice looking chart.
Click to expand...

No mods are needed, the two options are stock replacement, this injectors flow is a match to the stock injectors flow. The advantage is of using better injectors with better cone pattern, better solenoid time reaction, better heat isolation, better atomization and of course, are newer.

The use of the 48PSI FPR with the lower output injectors will yield even better performance, the higher the pressure the better the atomization.
 
For a 1990 you probably want the ford 19lb orange fuel injectors. I put them in my 90 after people made claims of better gas mileage and performance. I do seem to have a bit more power and it now does about 13MPG as opposed to the 11MPG I was getting. So they did make an improvement.
 
i think what the new (at least new to me) claim is that for the 19# injectors to work their best, it would be necessary to update the fuel pressure regulator so that our Pre-96 XJ's will have fuel pressure up to 43.5, rather than the 39 we are pushing now.

i've done a bit of reading and while there are varying ideas, i personally have been running the 19# on my 93' 4.0HO with no issue for the past 4 months (no amazing MPG gains to speak of, but my stock injectors were toast). I might toss on the new FPG next time i have 65$ laying around. But from the research i have just done (maybe someone else can correct me?), it looks like the up-graded FPG would be the best benefit at WOT.
 
hightime81 said:
i think what the new (at least new to me) claim is that for the 19# injectors to work their best, it would be necessary to update the fuel pressure regulator so that our Pre-96 XJ's will have fuel pressure up to 43.5, rather than the 39 we are pushing now.

i've done a bit of reading and while there are varying ideas, i personally have been running the 19# on my 93' 4.0HO with no issue for the past 4 months (no amazing MPG gains to speak of, but my stock injectors were toast). I might toss on the new FPG next time i have 65$ laying around. But from the research i have just done (maybe someone else can correct me?), it looks like the up-graded FPG would be the best benefit at WOT.
Click to expand...

The fuel pressure regulator is for 49 psi on the fuel rail at Wide open throttle. This will only be of benefit with 19# ev6 injectors. ev1 & ev1.3 injectors should be run at whatever pressure the fuel system they came from run at.

The 3 part numbers you can use are: Chrysler 4418850 or 5277829 or 5277864.- all 49PSI all will fit.
If you are a bit of a junk yard ferret -
Here is a list of cars that use this regulator:

CHRYSLER CONCORDE V6 3.5 F FI 1993-1995
CHRYSLER CONCORDE LX V6 3.5 F FI 1996-1997
CHRYSLER CONCORDE LXI V6 3.5 F FI 1996-1997
CHRYSLER DYNASTY V6 3.3 R FI 1991-1993
CHRYSLER IMPERIAL V6 3.3 R FI 1990-1991
CHRYSLER IMPERIAL V6 3.8 L FI 1991-1993
CHRYSLER INTREPID V6 3.5 F FI 1993-1997
CHRYSLER INTREPID ES V6 3.5 F FI 1995-1996
CHRYSLER LHS V6 3.5 F FI 1994-1997
CHRYSLER NEW YORKER V6 3.5 F FI 1994-1996
CHRYSLER NEW YORKER FIFTH AVENUE V6 3.3 R FI 1990-1993
CHRYSLER NEW YORKER FIFTH AVENUE V6 3.8 L FI 1991-1993
CHRYSLER NEW YORKER LANDAU V6 3.3 R FI 1990
CHRYSLER NEW YORKER SALON V6 3.3 R FI 1990-1993
CHRYSLER TC MASERATI V6 3.0 S FI 1990
CHRYSLER TOWN & COUNTRY V6 3.3 R FI 1990-1993
CHRYSLER TOWN & COUNTRY V6 3.8 L FI 1994-1995

DODGE CARAVAN V6 3.3 J FI 1994-1995
DODGE CARAVAN V6 3.3 R FI 1990-1995
DODGE CARAVAN C/V V6 3.3 J FI 1994-1995
DODGE CARAVAN C/V V6 3.3 R FI 1991-1992
DODGE CARAVAN ES V6 3.3 R FI 1993-1995
DODGE CARAVAN LE V6 3.3 R FI 1991-1995
DODGE CARAVAN SE V6 3.3 J FI 1994-1995
DODGE CARAVAN SE V6 3.3 R FI 1991-1995
DODGE DYNASTY V6 3.3 R FI 1990-1993
DODGE DYNASTY LE V6 3.3 R FI 1990-1993
DODGE GRAND CARAVAN ES V6 3.3 R FI 1993-1995
DODGE GRAND CARAVAN ES V6 3.8 L FI 1994-1995
DODGE GRAND CARAVAN LE V6 3.3 R FI 1990-1995

DODGE GRAND CARAVAN LE V6 3.8 L FI 1994-1995
DODGE GRAND CARAVAN SE V6 3.3 R FI 1990-1995
DODGE INTREPID V6 3.5 F FI 1993-1997
DODGE INTREPID ES V6 3.5 F FI 1993-1997
DODGE SPIRIT L4 2.5 V FI 1994
EAGLE VISION ESI V6 3.5 F FI 1995-1997
EAGLE VISION TSI V6 3.5 F FI 1993-1997
PLYMOUTH ACCLAIM L4 2.5 V FI 1994
PLYMOUTH GRAND VOYAGER LE V6 3.3 R FI 1990-1995
PLYMOUTH GRAND VOYAGER LE V6 3.8 L FI 1994-1995
PLYMOUTH GRAND VOYAGER SE V6 3.3 R FI 1990-1994
PLYMOUTH GRAND VOYAGER SE V6 3.8 L FI 1995
PLYMOUTH PROWLER V6 3.5 F FI 1997
PLYMOUTH VOYAGER V6 3.3 J FI 1994-1995
PLYMOUTH VOYAGER V6 3.3 R FI 1995

PLYMOUTH VOYAGER LE V6 3.3 R FI 1991-1995
PLYMOUTH VOYAGER LX V6 3.3 R FI 1994
PLYMOUTH VOYAGER SE V6 3.3 J FI 1994
PLYMOUTH VOYAGER SE V6 3.3 R FI 1991-1995

All this info is here:
http://www.cherokeeforum.com/f2/more-budget-injector-upgrade-questions-13848/index3/

With a synopsis here:
http://www.ausjeepoffroad.com/forum/showthread.php?t=92236
 
Last edited:
I put the gray top 24# injectors in my 96. I was under the impression they were the correct ones-by looking at 5omotorsports pages,
That was about 40,000 miles ago.
Wayne
 
I didn't see many options in this thread for a 2000 XJ. So I'm assuming that I need to go back with Stock OE injectors?
 
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