read a few threads about swapping out fel injectors with ones out of a dodge neon, and a few different model fords.
couldn't find one neon with the 2.4, and the ford v8's were all super high mileage. One of the threads mentioned using a ford taurus duractec engine's injectors.
found a taurus with only 100000 km's on the clock, and it was really easy to get at the injectors. 8 bolts hold the upper intake manifold on, and four bolts to get the egr tube off and you have easy access to everything, took 10 minutes. injectors are blue in colour and no, i forgot to get the serial numbers off them. paid a whopping 7 bucks for all 6.
took a little fighing to get them installed,
removed fuel rail and old injectors, and cleaned out bores with a toothbrush and throttle body cleaner.
it was much easier installing the new injectors to the rail first, lubbing the o-rings with trans fluid, and then installing the whole assembly to the head.
avereage mileage according to the trip computer before was 16.8 miles to the gallon with 50 / 50 cty / hwy. 280000 kms on the clock with a fresh tune and oil change and free-flowing exhaust (stock cat, cherry bomb glass pack, and junkyard tailpipe off a v8 GC that has a larger diameter)
no BS the trip computer now reads average of 22.8 in city with a much better seat of the pants feel. haven't run it on the highway yet, we'll see.
real easy swap / upgrade if you have the patience.
:2thumbsup:
If the new injectors flow more than the old ones, the engine computer will adjust the fuel trim to compensate and keep the proper air fuel ratio (based upon feedback from the O2 sensor). Since the computer doesn't know the flow rate has changed, it will assume that the reduced injector on time means it is injecting less fuel into the engine when it sends calculations to the trip computer.
Dear god I dunno how/why this became known as the "Neon injector upgrade" but that idea needs to die die die DIE!!!
You're not going to find them on a Neon.
You want the 703 from 2.4L 95-97 Chryslers. I've pulled 3 sets from 3 different Dodge Stratus now. Fuel rail is literally sitting right there, 2 bolts and it's off. Must have took me under 3 minutes to pull em off. Ford is 715 off mid 90s 4.6 and 5.0L.
I definitely noticed a difference after I installed them, engine runs smoother and I'm getting about 20-40 miles more per 20gal fill-up.
Dear god I dunno how/why this became known as the "Neon injector upgrade" but that idea needs to die die die DIE!!!
You're not going to find them on a Neon.
You want the 703 from 2.4L 95-97 Chryslers. I've pulled 3 sets from 3 different Dodge Stratus now. Fuel rail is literally sitting right there, 2 bolts and it's off. Must have took me under 3 minutes to pull em off. Ford is 715 off mid 90s 4.6 and 5.0L.
I definitely noticed a difference after I installed them, engine runs smoother and I'm getting about 20-40 miles more per 20gal fill-up.
Except they don't flow more fuel... Flow rates are the same.
They just do a much better job of creating a fine mist of fuel vs a thick single stream which results in a more efficient, complete burn of the fuel in the cylinder.
This mod is definitely on my list of to-do's. Think I'll go with the Ford 4.6-5.0's though. Just seems to me that the Chrysler 2.4's are too close to being maxxed out, causing a shortened injector lifespan...
I love these injectors! Chrysler had a mini van with a 2.4 as well. There are different connectors on different years. I read a thread on cherokee forum explaining it all. So I set out and bought the correct ones and it's nite and day difference!!!!! Definitely improves the crappy idle of the 4.0.
Sweet! I think I'll need to do this to my zj. I might even be able to get them for free! Even if you only gain say 1 or 2 mpg over a year that adds up. Especially since I put over 15k per year on my pickup alone. My bike get another 10k or so. That's a l of. Miles
Zander do you have a 4.0? If so get a 99+ intake manifold for it. I just put on mine this past weekend and it's great. Just filled up so we'll see how it does mileage wise this next week.
'scuse my ignorance, but what are the differences/advantages of the newer model intakes? I'm due an exhaust manifold, so the convince me i need to find a 99+ intake to install while I have it apart. :help:
Just makes it easier to go in once if possible. I even managed to find the trans mount brackett that has the exhaust pipe mount bushing on it. Three places told me it was no longer available.
Zee, from what I've absorbed you get a smoother idle and a shift in the torque curve towards the lower end. The straight runners are biased toward the upper rpm's. I don't think mpg is a real player in it but alot of people who have also went to the four hole injector claim to have picked up some mpg.
The manifold itself does hold a larger volume of air but unless throttle body modifications are made you are still drawing air through the stock ID bore. With all the hiway you do i'm not sure it would be worth it but those who know more than me will chime in hpoefully.
Pre-99 manifold has a tiny tiny plenum chamber with only 2 runners which feed the end cylinders. The middle 4 branch off from those at harsh angles. It's almost laughable what a poor design it is when you compare it to the redesigned 99+ manifold. The plenum chamber is huge and feeds each cylinder directly with curved runners. The pictures speak for themselves.
I've had mine on for a week. Low end grunt is great, pulls hard from a standstill or rolling start. On the highway I barely have to touch the throttle to maintain speed. I'm seeing pretty good mpg numbers so far, about halfway through my tank. I'll get a proper number when I fill up in a couple days. I'm trying to take it easy but it's hard not to keep punching it to the floor
LOL,thanks melk for "pointing that out" to us. Looks like a good install. Damn you got big toes,lmao. How did the vac lines go in? Have to splice alot? Was trying to do my own thing and change the oil, fix a wiper washer leak,put another coat of clear on the 5.9 rims, but nooooo, the GF had to go on b+++ch fit and I broke the top of the sending unit off. $51 for a socket and unit later at advance, she's getting close to being replaced also.
My rear ccv vac line did not reach so I just left it unplugged for now. One of the sensors needs to be extended. Other than that no real issues.
93-95 needs some work with the PS bracket but 96-98 is a direct bolt up.
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