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703/784 injector swap write up

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Old Oct 21, 2012 | 10:40 AM
  #211  
dukie564's Avatar
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From: Aberdeen, MD
Year: 1995
Model: Cherokee
Engine: 4.0L HO I-6, 703 Injectors, Brown Dog Super Engine Mounts
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784s
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Old Oct 21, 2012 | 07:00 PM
  #212  
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From: U.A.E
Year: 2001
Model: Cherokee
Engine: 4.0
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ok , after the swap any real deference in power or responding or MPG ??
Im planing to do the swap but is it worth it !!
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Old Oct 22, 2012 | 07:27 AM
  #213  
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From: Virginia Beach by way of Michigan
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Any mpg increase is due to running clean injectors. smoother idle and better throttle response are the benefits you will actually get from doing the swap and it's worth it IMO.
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Old Oct 22, 2012 | 04:25 PM
  #214  
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From: Nashville, TN
Year: 2001
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For guy who have done this. How long did it take you to complete this swap.
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Old Oct 22, 2012 | 04:43 PM
  #215  
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i did mine a couple days ago...took less than an hour
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Old Oct 22, 2012 | 04:51 PM
  #216  
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From: Baltimore, Maryland
Year: 1994 1993
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Engine: 4.0
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Originally Posted by jsavage
For guy who have done this. How long did it take you to complete this swap.
The fastest I have ever timed myself doing it from the time someone yelled "Go" until I had them swapped and restarted the engine was 14 mins 36 seconds . But any home mechanic with average skills and just 3-4 common tools can swap injectors in a Cherokee in under an hour easily without rushing. There are some step-by-step write-ups on it on the forum and online but some ask you to remove way more stuff than you really need to. There's nothing wrong with removing more stuff but it isn't really necessary. As no rdplz mentioned the main purpose for the swap is performance but some people get a mild mpg gain just by getting rid of clogged old injectors.
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Old Oct 22, 2012 | 05:43 PM
  #217  
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From: puyallup
Year: 2001
Model: Cherokee
Engine: 4.0
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just picked up 4 784's from the junkyard today... all the other cars were either different, already taken or in a fire

hope to hit another junkyard tomorrow and pick up a couple more
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Old Oct 22, 2012 | 05:56 PM
  #218  
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From: Parham, ON
Year: 1999
Model: Cherokee
Engine: 4.0L OBD-II
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Originally Posted by jsavage
For guy who have done this. How long did it take you to complete this swap.
Some simple advice in this case: travel to your local pink-n-pull junkyard and practice on an XJ or ZJ if you're nervous. A JY visit to me is always a learning experience

Originally Posted by mehoff_400
just picked up 4 784's from the junkyard today... all the other cars were either different, already taken or in a fire

hope to hit another junkyard tomorrow and pick up a couple more
F&$#ing 782 injectors! I could only find 4x 784s I could also only find 6x Ford XF2E-C4Bs so took those instead.

Great thread... will be joining the ranks soon
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Old Oct 22, 2012 | 06:00 PM
  #219  
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From: Indianapolis
Year: '99 and '91
Model: Cherokee
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I had found 4 at the JY too. Then never found anymore for about 5 months. Ended up buying 4 off a guy on CF. Now I need to find four more to make another set!
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Old Nov 6, 2012 | 09:24 AM
  #220  
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From: Flushing, MI
Year: 1993
Model: Cherokee
Engine: 4.0
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Here's my Injector Swap story,
I took a chance on an ebay offering and bought 12 703s. 6 for my daughter's 160,000 mile '98, 6 for my '93. soaked them overnight in injector cleaner and sprayed the heck out of them with carb cleaner. I didn't do the whole hook it to a battery and backflush thing...call me lazy.
Installed them in my daughter's '98 and BINGO! the thing runs like a champ. I may have had similar results with a complete cleaning of the injectors I took out of her Jeep. A failed/clogged injector on #6 started this process, everything was scary dirty including the fuel rail. But I wanted to try the 703 swap after reading so many success stories.
I also swapped 703s into my 70,000 mile '93. I had a hard time getting it started, still not sure why but after many, many tries and letting it sit for a couple hours it finally fired up. The improvement is not as dramatic (again, the '98 was really dirty) but part throttle response is improved.
Ready for the improved MPG!
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Old Dec 11, 2012 | 07:40 AM
  #221  
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From: Texas
Year: 1999
Model: Cherokee
Engine: 4.0
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Maybe I'm blind, but what vehicles should I look for the 784s
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Old Dec 11, 2012 | 08:38 AM
  #222  
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From: Parham, ON
Year: 1999
Model: Cherokee
Engine: 4.0L OBD-II
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784s are found in Dodge/Chrysler/Plymouth vehicles around 1998-2000 with the 2.4L engine. This includes the Neon all the way up to the Caravan.
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Old Dec 11, 2012 | 10:54 AM
  #223  
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From: Texas
Year: 1999
Model: Cherokee
Engine: 4.0
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Originally Posted by salad
784s are found in Dodge/Chrysler/Plymouth vehicles around 1998-2000 with the 2.4L engine. This includes the Neon all the way up to the Caravan.
Thank you
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Old Jan 1, 2013 | 09:51 PM
  #224  
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From: glendale az
Year: 1988
Model: Cherokee
Engine: 4.0
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I have a couple extra sets of 703 injectors if anyone needs any
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Old Jul 21, 2013 | 05:19 PM
  #225  
wingit's Avatar
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From: Birmingham, Al
Year: 2001
Model: Cherokee
Engine: 4.0
Default Reset ECU

Is it necessary to reset the ECU after doing the upgrade? I just did this today and did not reset it.
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