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Unread 02-01-2011, 10:46 PM   #61
bowtieman55
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This may be floating around the 'net; I don't know. But, this is a good write-up about using the '703 injectors.

"I know a few of us have swapped 4.0's into their FSJ, and lots more of us have baby jeeps with them so I thought I would post about this upgrade. If mods need to, you can move it to off topic, I figured it was relevent to the subject. I did however do this to my YJ.

After reading on another jeep site that the dodge 2.4L 4cyl injectors are a direct replacement for the 4.0 injectors, and are the newer EV6 design with the 4 hole spray pattern. I decided to give it a try. It's supposed to give a smoother running engine and be a little more efficent because of the better spray pattern.
You can get them from 96-97 cryl cirrus and seabring and dodge caravan with the 2.4 4cyl. The injectors on these engines are real easy to get to and are right in the front, remove two bolts and pull the fuel rail. It has to be the 96-97, any newer and they will have a diffrent style plug for the wires and wont work.
The injectors can also come from 95-97 dodge neon and stratus and plymoth breeze with the 2.0 4cyl, BUT it has to be the DOHC 2.0, NOT the SOHC 2.0. These are a lot harder to get to the injectors, the ones I looked at in the yards, the injectors are on the back of the engine burried under the intake and a bunch of other mess way too much work to get too unless you have no choice.

Before you pull them you can check the numbers on them to make sure they are correct. With the inlet facing you and the connector on top, the numbers will be on the left side. It will be tiny and kinda hard to see, but it will say 0280155703.

I went to one yard and pulled 4 from a seabring, but it was the only car there with the correct year range. All the other were either missing the engines, were V6 vans or too new. But I scored 4 for $5 each. I went to another yard and pulled two more from another seabring and got them for $10 each. Picked up some new O-rings ar the parts store and swaped them out. I wont go into much deatail on the swap as its pretty much straight forward. No mods or anything has to be done. Just pull the old ones out and push the new ones in. USE PLENTY OF LUBE ON THE O-RINGS!!! I tore two trying to push them in the fuel rail cause I didnt lube them good enough. Use a lightweight oil that wont harm rubber.

Once I got it primed and checked for leaks after cycleing the fuel pump a couple times I fired it up. After it got done working the air out it settled down to a WAY smoother idle. In the 11 years I have had this jeep, I dont think it has ever idled this smooth. I do a test drive and just about everywhere it runs way smoother. No increased power, but I wasnt expecting any, they are stock flow, they just have a better spray pattern. I get back to the house, shut it off and clean up some. I decide to make a run to the dumpster and crank it back up, it starts WAY quicker.
Drove it to work today and this moring (cold start) it starterd quicker, idles smoother, and run better when cold.

So all and all I am very happy with the easy and cheap swap. I would reccomend this to anyone with a 4.0. Mine has 263K on it and had the factory injectors put in at the factory in 1993 and had not been touched since...lol If your high mileage 4.0 still has the original injectors its definitely worth it, even low mileage ones would probably benifit.
After driving it a few weeks I will report back and see if there is any change in fuel mileage

Updae 1:
Now that the computer has had a couple days to adjust itself I have noticed it pulling hills better and while accerating the engine even sounds smoother while driving. It hasnt run this good in recent memory (several years!)
It was in the 30's here this morning and it would usally spitter for about a second after I started it in the cold. Now it doesn't do it. It starts right up and goes straight to a smooth idle. I also used to have to give it a little more gas when cold when pulling out or it would want to die if I didn't. But that was only when I pull out for the first time. Now even when cold it doesn't do this anymore. I juat barely touch the gas to pull out. And last there is a stop sign about 1/8 mile from my driveway, when cold I would let off the gas to slow down it would always kinda blop blop blop out the exhaust, sometimes flat out backfire if I had the rpm's up. But that's only when cold, wouldn't do it warm. Now with the new injectors it no longer does this. So I am very happy with this swap"


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Unread 02-01-2011, 10:46 PM   #62
ZJ5point2GCL
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Awesome! Thanks

Quote:
Originally Posted by bowtieman55 View Post
Bosch 0280155703 Injector donor vehicles.

1997 Chrysler Cirrus LX Sedan 4-Door 2.4L 2429CC 148Cu. In. l4 GAS DOHC Naturally Aspirated View
1997 Chrysler Cirrus LXi Sedan 4-Door 2.4L 2429CC 148Cu. In. l4 GAS DOHC Naturally Aspirated View
1997 Chrysler Sebring JX Convertible 2-Door 2.4L 2429CC 148Cu. In. l4 GAS DOHC Naturally Aspirated View
1997 Chrysler Sebring JXi Convertible 2-Door 2.4L 2429CC 148Cu. In. l4 GAS DOHC Naturally Aspirated View
1997 Dodge Caravan Base Mini Passenger Van 4-Door 2.4L 2429CC 148Cu. In. l4 GAS DOHC Naturally Aspirated View
1997 Dodge Caravan SE Mini Passenger Van 4-Door 2.4L 2429CC 148Cu. In. l4 GAS DOHC Naturally Aspirated View
1997 Dodge Neon Base Coupe 2-Door 2.0L 1996CC 122Cu. In. l4 GAS DOHC Naturally Aspirated View
1997 Dodge Neon Base Sedan 4-Door 2.0L 1996CC 122Cu. In. l4 GAS DOHC Naturally Aspirated View
1997 Dodge Neon High Line Coupe 2-Door 2.0L 1996CC 122Cu. In. l4 GAS DOHC Naturally Aspirated View
1997 Dodge Neon High Line Sedan 4-Door 2.0L 1996CC 122Cu. In. l4 GAS DOHC Naturally Aspirated View
1997 Dodge Neon Sport Sedan 4-Door 2.0L 1996CC 122Cu. In. l4 GAS DOHC Naturally Aspirated View
1997 Dodge Stratus Base Sedan 4-Door 2.4L 2429CC 148Cu. In. l4 GAS DOHC Naturally Aspirated View
1997 Dodge Stratus ES Sedan 4-Door 2.4L 2429CC 148Cu. In. l4 GAS DOHC Naturally Aspirated View
1997 Plymouth Neon Base Coupe 2-Door 2.0L 1996CC 122Cu. In. l4 GAS DOHC Naturally Aspirated View
1997 Plymouth Neon Base Sedan 4-Door 2.0L 1996CC 122Cu. In. l4 GAS DOHC Naturally Aspirated View
1997 Plymouth Neon High Line Coupe 2-Door 2.0L 1996CC 122Cu. In. l4 GAS DOHC Naturally Aspirated View
1997 Plymouth Neon High Line Sedan 4-Door 2.0L 1996CC 122Cu. In. l4 GAS DOHC Naturally Aspirated View
1997 Plymouth Voyager Base Mini Passenger Van 3-Door 2.4L 2429CC 148Cu. In. l4 GAS DOHC Naturally Aspirated View
1997 Plymouth Voyager SE Mini Passenger Van 3-Door 2.4L 2429CC 148Cu. In. l4 GAS DOHC Naturally Aspirated View
1996 Chrysler Cirrus LX Sedan 4-Door 2.4L 2429CC 148Cu. In. l4 GAS DOHC Naturally Aspirated
1996 Chrysler Sebring JX Convertible 2-Door 2.4L 2429CC 148Cu. In. l4 GAS DOHC Naturally Aspirated View
1996 Dodge Neon Base Coupe 2-Door 2.0L 1996CC 122Cu. In. l4 GAS DOHC Naturally Aspirated View
1996 Dodge Neon Base Coupe 2-Door 2.0L 1996CC 122Cu. In. l4 GAS SOHC Naturally Aspirated View
1996 Dodge Neon Base Sedan 4-Door 2.0L 1996CC 122Cu. In. l4 GAS DOHC Naturally Aspirated View
1996 Dodge Neon Base Sedan 4-Door 2.0L 1996CC 122Cu. In. l4 GAS SOHC Naturally Aspirated View
1996 Dodge Neon High Line Coupe 2-Door 2.0L 1996CC 122Cu. In. l4 GAS DOHC Naturally Aspirated View
1996 Dodge Neon High Line Coupe 2-Door 2.0L 1996CC 122Cu. In. l4 GAS SOHC Naturally Aspirated View
1996 Dodge Neon High Line Sedan 4-Door 2.0L 1996CC 122Cu. In. l4 GAS DOHC Naturally Aspirated View
1996 Dodge Neon High Line Sedan 4-Door 2.0L 1996CC 122Cu. In. l4 GAS SOHC Naturally Aspirated View
1996 Dodge Neon Sport Coupe 2-Door 2.0L 1996CC 122Cu. In. l4 GAS DOHC Naturally Aspirated View
1996 Dodge Neon Sport Coupe 2-Door 2.0L 1996CC 122Cu. In. l4 GAS SOHC Naturally Aspirated View
1996 Dodge Neon Sport Sedan 4-Door 2.0L 1996CC 122Cu. In. l4 GAS DOHC Naturally Aspirated View
1996 Dodge Neon Sport Sedan 4-Door 2.0L 1996CC 122Cu. In. l4 GAS SOHC Naturally Aspirated View
1996 Dodge Stratus Base Sedan 4-Door 2.4L 2429CC 148Cu. In. l4 GAS DOHC Naturally Aspirated View
1996 Dodge Stratus ES Sedan 4-Door 2.4L 2429CC 148Cu. In. l4 GAS DOHC Naturally Aspirated View
1996 Plymouth Breeze Base Sedan 4-Door 2.0L 1996CC 122Cu. In. l4 GAS SOHC Naturally Aspirated View
1996 Plymouth Neon Base Coupe 2-Door 2.0L 1996CC 122Cu. In. l4 GAS DOHC Naturally Aspirated View
1996 Plymouth Neon Base Coupe 2-Door 2.0L 1996CC 122Cu. In. l4 GAS SOHC Naturally Aspirated View
1996 Plymouth Neon Base Sedan 4-Door 2.0L 1996CC 122Cu. In. l4 GAS DOHC Naturally Aspirated View
1996 Plymouth Neon Base Sedan 4-Door 2.0L 1996CC 122Cu. In. l4 GAS SOHC Naturally Aspirated View
1996 Plymouth Neon High Line Coupe 2-Door 2.0L 1996CC 122Cu. In. l4 GAS DOHC Naturally Aspirated View
1996 Plymouth Neon High Line Coupe 2-Door 2.0L 1996CC 122Cu. In. l4 GAS SOHC Naturally Aspirated View
1996 Plymouth Neon High Line Sedan 4-Door 2.0L 1996CC 122Cu. In. l4 GAS DOHC Naturally Aspirated View
1996 Plymouth Neon High Line Sedan 4-Door 2.0L 1996CC 122Cu. In. l4 GAS SOHC Naturally Aspirated View
1996 Plymouth Neon Sport Coupe 2-Door 2.0L 1996CC 122Cu. In. l4 GAS DOHC Naturally Aspirated View
1996 Plymouth Neon Sport Coupe 2-Door 2.0L 1996CC 122Cu. In. l4 GAS SOHC Naturally Aspirated View
1996 Plymouth Neon Sport Sedan 4-Door 2.0L 1996CC 122Cu. In. l4 GAS DOHC Naturally Aspirated View
1996 Plymouth Neon Sport Sedan 4-Door 2.0L 1996CC 122Cu. In. l4 GAS SOHC Naturally Aspirated View
1995 Chrysler Cirrus LX Sedan 4-Door 2.4L 2429CC 148Cu. In. l4 GAS DOHC Naturally Aspirated View
1995 Dodge Neon Base Sedan 4-Door 2.0L 1996CC 122Cu. In. l4 GAS SOHC Naturally Aspirated View
1995 Dodge Neon High Line Coupe 2-Door 2.0L 1996CC 122Cu. In. l4 GAS SOHC Naturally Aspirated View
1995 Dodge Neon High Line Coupe 2-Door 2.0L 1997CC 122Cu. In. l4 GAS DOHC Naturally Aspirated View
1995 Dodge Neon High Line Sedan 4-Door 2.0L 1996CC 122Cu. In. l4 GAS SOHC Naturally Aspirated View
1995 Dodge Neon High Line Sedan 4-Door 2.0L 1997CC 122Cu. In. l4 GAS DOHC Naturally Aspirated View
1995 Dodge Neon Sport Coupe 2-Door 2.0L 1996CC 122Cu. In. l4 GAS DOHC Naturally Aspirated View
1995 Dodge Neon Sport Coupe 2-Door 2.0L 1996CC 122Cu. In. l4 GAS SOHC Naturally Aspirated View
1995 Dodge Neon Sport Sedan 4-Door 2.0L 1996CC 122Cu. In. l4 GAS DOHC Naturally Aspirated View
1995 Dodge Neon Sport Sedan 4-Door 2.0L 1996CC 122Cu. In. l4 GAS SOHC Naturally Aspirated View
1995 Dodge Stratus Base Sedan 4-Door 2.0L 1996CC 122Cu. In. l4 GAS SOHC Naturally Aspirated View
1995 Dodge Stratus Base Sedan 4-Door 2.4L 2429CC 148Cu. In. l4 GAS DOHC Naturally Aspirated View
1995 Dodge Stratus ES Sedan 4-Door 2.0L 1996CC 122Cu. In. l4 GAS SOHC Naturally Aspirated View
1995 Dodge Stratus ES Sedan 4-Door 2.4L 2429CC 148Cu. In. l4 GAS DOHC Naturally Aspirated View
1995 Plymouth Neon Base Sedan 4-Door 2.0L 1996CC 122Cu. In. l4 GAS SOHC Naturally Aspirated View
1995 Plymouth Neon High Line Coupe 2-Door 2.0L 1996CC 122Cu. In. l4 GAS DOHC Naturally Aspirated View
1995 Plymouth Neon High Line Coupe 2-Door 2.0L 1996CC 122Cu. In. l4 GAS SOHC Naturally Aspirated View
1995 Plymouth Neon High Line Sedan 4-Door 2.0L 1996CC 122Cu. In. l4 GAS DOHC Naturally Aspirated View
1995 Plymouth Neon High Line Sedan 4-Door 2.0L 1996CC 122Cu. In. l4 GAS SOHC Naturally Aspirated View
1995 Plymouth Neon Sport Coupe 2-Door 2.0L 1996CC 122Cu. In. l4 GAS DOHC Naturally Aspirated View
1995 Plymouth Neon Sport Coupe 2-Door 2.0L 1996CC 122Cu. In. l4 GAS SOHC Naturally Aspirated View
1995 Plymouth Neon Sport Sedan 4-Door 2.0L 1996CC 122Cu. In. l4 GAS DOHC Naturally Aspirated View
1995 Plymouth Neon Sport Sedan 4-Door 2.0L 1996CC 122Cu. In. l4 GAS SOHC Naturally Aspirated View
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Unread 02-04-2011, 01:26 AM   #63
ZJ5point2GCL
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Where did you find the basket filters here in calgary?

i have my Bosch +4 injectors off my 5.2 that i just replaced all the o rings and pintile caps, but i cant seem to find the filters for them


Quote:
Originally Posted by CatSplat View Post
OK, bump from a couple weeks ago but with relevant info.

I did some searching around and a few online charts listed the 0280155703 as a ~16lb/hr injector which gave me cause for worry. The guys at Witchhunter say theirs tested out at 238cc/min (22.7lb/hr) @ 3 bar (43.5psi). So I said to hell with it and dragged out my DIY flowbench to see what was what.

I tested sixteen 0280155703 injectors (cleaned and with brand new filters) at 40psi and got an average of 228 cc/min (21.7 lb/hr). Convert that to 3 bar and you get 237.8cc/min, almost exactly the results Witchhunter got.

So, bottom line? The EV6 Bosch 0280155703 is a pretty straightforward upgrade in injector design over the stock EV1 Siemens Deka units. Early ZJs with 39 psi regulators can see ~21.5lb/hr while later Jeeps with 49psi units can expect ~24lb/hr. Not a bad upgrade, available at your local junkyard.

Makes me wonder what would happen if you swapped the 39psi regulator for a 49 psi one.
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Unread 02-04-2011, 09:15 AM   #64
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I ordered my filters online, actually.

http://www.ioffer.com/i/100-micro-ba...tors-143145763

I bought them from that same seller, but I only bought 30 instead of the 100-pack.
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Unread 02-04-2011, 09:47 AM   #65
ZJ5point2GCL
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Quote:
Originally Posted by CatSplat View Post
I ordered my filters online, actually.

http://www.ioffer.com/i/100-micro-ba...tors-143145763

I bought them from that same seller, but I only bought 30 instead of the 100-pack.
I was hoping you bought them locally thats a good price, but i only need 8

i can't find there name or number any where but there was a fuel injector place here i called about cleaning and doing the o rings and such about a year ago.

i guess i'll keep looking for now.
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Unread 02-05-2011, 08:26 PM   #66
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http://www.fuelinjectorconnection.co...&productId=123

Sold individually. I just picked up some Ford #19 injectors today, plan to get a few extra baskets in case I screw them up on install.
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Unread 02-06-2011, 12:20 PM   #67
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Went to your link myetball, looks like a good dealer. I can't spring for $600 dollars for new 4 holes. Emailed the guy and told him what I had and he emailed back in just a few minutes. He said for the 4.0 grand cherokee I would get the 24lb 4hole for 135.00 shipped. All new orings {Viton}, pintles ect.

The closest I could find on ebay was 161.00 shipped. Only thing is I'm not sure the FIC ones are 703's.
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Unread 02-07-2011, 09:46 AM   #68
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Check out the flow on the Ford #19 injector. Note he states the Ford's #19 rating is based on a 37psi fuel system. At the more standard 43.5 psi they flow at #22. Take that up to our 49-50psi and you get an injector that flows right about #23.
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Unread 02-07-2011, 12:38 PM   #69
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http://injector-rehab.com/shop/home.php

This place has a wider selection of various parts. I ended up ordering the Ford specific filter baskets along with o-rings and Bosch-3 pintle caps.

UPDATE: Don't get the Ford screens for the yellow injectors, they don't fit. Stick with the Bosch screens. Another week of waiting to get these installed.
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Unread 02-22-2011, 04:19 PM   #70
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Picked up some 703 injectors at the jy yesterday and they all ohmed out at 12.6 ohms. The siemens injectors in the 98 4.0 ohm at 13. Will this affect anything?
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Unread 02-22-2011, 05:11 PM   #71
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0.4 ohms is pretty much negligible in this application, most manufacturers have a tolerance of +- ~1.0 ohm when testing injectors anyway. The Ford 19# injector is a common swap and it's 14.5ohm (+1.5), so I have no reason to believe your -0.4ohm difference will cause you any problems.
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Unread 02-22-2011, 06:03 PM   #72
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Thanks cat. I think the self clean rig looks pretty doable, and the rebuild kits at 28.00 for six injectors is cheap enough. But I,m kinds antsy about not having the flow test done. Can send them off and have all the whiz bang cleaning and kits installed for96.00. Thats still way cheaper than six new injectors.
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Unread 03-01-2011, 09:40 AM   #73
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Finally got around to installing the ford yellow injectors. Turns out my junkyard injectors were just that with only 5 of 8 injectors functioning properly. I'll probably end up taking six of them in for service/cleaning. While I was messing with the injectors I decided to put the stock Siemens injectors back in to see if I could tell a difference after running EV6 injectors for a good while.

Results? Felt like my Jeep was castrated. Throttle feels spongy with throttle response more of a waiting game than anything else. Excessive throttle required to accellerate and still nowhere near the accelleration as with the EV6 injectors.

Now that I know the 19lb. rating for the yellow injectors is bogus and they are actually 22lb. injectors I'm not so sure I need to change. At my fuel pressure of 50psi they would be 23.5lb injectors. The blue EV6's should be flowing at 25lb. at 50 PSI. Seems like splitting hairs at this point.

The best example is the effect when cruising up large hills. At 75-80 with the EV6 injectors I just need to press a bit on the pedal to maintain speed up hills, still in OD. With the Siemens injectors I cannot maintain speed in OD, I have to floor it and kick down into third to maintain speed.

So the blue EV6's will go back in this weekend.
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Unread 03-01-2011, 10:45 AM   #74
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What did you pull the Blue EV6's from?

I'll be hitting the JY this weekend. So much stuff on the shopping list!
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Unread 03-01-2011, 11:00 AM   #75
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They were out of a 3.0 DOHC Taurus, believe it's the 24 valve duratec engine. You'll need an 8mm socket.
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