Fuel injectors 5.9 upgrade, to 4 hole injectors - JeepForum.com
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post #1 of 20 Old 06-27-2011, 10:45 AM Thread Starter
divco13
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Fuel injectors 5.9 upgrade, to 4 hole injectors

Has any of you swaped single port, to 4 port ( hole ) Injector's on your 1998- 5.9.
What Make, and Model / Year

Want to keep rate of flow the same, just better atomization.

Looked for a conversion chart on line, no luck


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post #2 of 20 Old 06-27-2011, 10:56 AM
zander21510
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I've done it on my 4.0...i've read from most places for the 4.0 and 5.2 the flow rate is the same, if its the same for the 5.9 then it should work. I pulled mine from 95-97 Cirrus. Look at your local JY for chrysler cars with 2.0 engines, the injectors have 2 numbers, one ends in 703. Its so easy I took the things out in about 10 minutes, installed in my jeep in about 20 minutes. Well worth it, idles smoother and better throttle response.
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post #3 of 20 Old 06-27-2011, 11:13 AM
melk
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Well worth the couple bucks to get new filter baskets IMHO
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post #4 of 20 Old 06-27-2011, 02:17 PM
Grand_ZJ
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Good info.

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post #5 of 20 Old 06-27-2011, 02:41 PM
Scottso699
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Quote:
Originally Posted by divco13 View Post
Has any of you swaped single port, to 4 port ( hole ) Injector's on your 1998- 5.9.
What Make, and Model / Year

Want to keep rate of flow the same, just better atomization.

Looked for a conversion chart on line, no luck
I switched to Ford Racing 24lbs 4 port injectors on my 5.9L. I saw a boost in fuel economy. I imagine due to it being a better flowing injector.

Scott

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2014 WK2 Limited
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post #6 of 20 Old 06-27-2011, 04:15 PM
zander21510
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I remember reading about the flow rate for the 703's, supposedly they are rated lower than they actually flow...a few bench tests proved that they flow at the same rate as the stock injectors.
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post #7 of 20 Old 06-27-2011, 05:08 PM
CatSplat
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My 5.9 runs great on the 703's, your '98 should have no problems, especially with the higher fuel rail pressure. Change the internal filters, as mentioned (and pictured) above.

1994 5.9L ZJ, retrofitted UC package, NP242 swap, 17" JK Moabs with 32" BFG MT KM's.
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post #8 of 20 Old 06-27-2011, 07:21 PM
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post #9 of 20 Old 06-28-2011, 09:22 AM Thread Starter
divco13
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  1. Just found this chart, on all fuel injector by Bosch.
  2. http://www.justfuelinjectors.com/ser...CHRYSLER_MOPAR
  3. Chrysler - Mopar Section, Look far right for application

  4. Is the Impedance, High or Low ?

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post #10 of 20 Old 06-28-2011, 09:25 AM Thread Starter
divco13
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Quote:
Originally Posted by CatSplat View Post
My 5.9 runs great on the 703's, your '98 should have no problems, especially with the higher fuel rail pressure. Change the internal filters, as mentioned (and pictured) above.

Change the internal filters
Where are this on a 5.9 fuel rail ?

Bob
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post #11 of 20 Old 06-28-2011, 09:58 AM
CatSplat
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Quote:
Originally Posted by divco13 View Post
Change the internal filters
Where are this on a 5.9 fuel rail ?
The injector filters are inside the top of the injectors themselves. They can be removed with an appropriately-sized (#10 usually works) metal screw and a pair of pliers.

This is the guide I followed the first time I did injectors; it is for older EV1 injectors with an external (and easily damaged) pintle, the 703s do not have that and thus are far less easy to damage:

http://www.rowand.net/Shop/Tech/DIYFuelInjectorCleaning.htm

The basics of replacing seals and filters is identical to the EV3s.

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post #12 of 20 Old 06-28-2011, 03:22 PM Thread Starter
divco13
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When we get done here we will have a nice data base, for All

There for, What is the full part # for the so called Bosch 703's

Bob
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post #13 of 20 Old 06-28-2011, 04:56 PM
CatSplat
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Part number 0-280-155-703.

http://www.jeepforum.com/forum/f13/d...4-0-a-1145336/

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post #14 of 20 Old 06-28-2011, 05:50 PM Thread Starter
divco13
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Quote:
Originally Posted by CatSplat View Post
[B][B]

Stock 98 injectors out of a 2.4 are 0-280-155-782 Bosch Injectors, part number 04669772.
21.3 lb/hr @ 43.5 psi.

Stock 96 injectors out of a 2.4 are 0-280-155-703 Bosch Injectors, part number 05277739AB.
16.75 lb/hr @ 43.5 psi.


Stock 97 injectors out of a 2.4 are 0-280-155-740 Bosch Injectors, part number 4669471AB.
21.1 lb/hr @ 43.5 psi

0-280-155-703 - - - Chrysler 4-2.4l, Dodge 4-2.0l

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post #15 of 20 Old 06-28-2011, 07:49 PM
jforse
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Quote:
Originally Posted by Scottso699 View Post
I switched to Ford Racing 24lbs 4 port injectors on my 5.9L. I saw a boost in fuel economy. I imagine due to it being a better flowing injector.

Are these what they call EV6 blue tops?

1997 TJ - Build in process.
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