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renix rough low idle

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Old 08-27-2012 | 11:52 PM
  #16  
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Originally Posted by cruiser54
Caged is trying to tell you something here. The factory original injectors were a fire hazard and should be replaced with upgraded injectors.

+1
If yours is spraying gas when you twist it, it is a fire hazard NOW. You are past the grace period, lol. Please change them before you have a permanent "overheat" event.
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Old 08-27-2012 | 11:57 PM
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Contact Programbo here on CF and he can provide you with upgraded replacements.
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Old 08-28-2012 | 05:22 AM
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Originally Posted by Slim357

How can you tell when it goes into a closed loop whats the difference between open and closed loop?
The only way to tell is to have a scanner that can show the live data but some of the easy signs are a poor idle due to it dumping in too much gas, sooty tailpipe with it being wet right on the end, mileage will be horrible. Just some of the easier ways to tell.
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Old 08-28-2012 | 07:59 AM
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Originally Posted by Guntar13
The only way to tell is to have a scanner that can show the live data but some of the easy signs are a poor idle due to it dumping in too much gas, sooty tailpipe with it being wet right on the end, mileage will be horrible. Just some of the easier ways to tell.
Mine always used to be wet on the end of the tailpipe, till I put my muffler on. It still looks kinda sooty in there though. And I get about 13mpg. Think I should do the injector upgrade? I've heard some guys having problems with the swap though. Especially in the renix.
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Old 08-28-2012 | 09:12 AM
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Originally Posted by XJ.89.Limited
Mine always used to be wet on the end of the tailpipe, till I put my muffler on. It still looks kinda sooty in there though. And I get about 13mpg. Think I should do the injector upgrade? I've heard some guys having problems with the swap though. Especially in the renix.
Get the injectors from programbo and you'll be fine. The problems occur when people guess at which injectors to get from the junkyard and they're dirty old things to begin with.

Does your Jeep have a tach?
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Old 08-28-2012 | 03:03 PM
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Originally Posted by cruiser54
Get the injectors from programbo and you'll be fine. The problems occur when people guess at which injectors to get from the junkyard and they're dirty old things to begin with.

Does your Jeep have a tach?
How much do the injectors run? And yup, I have a tach.
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Old 08-28-2012 | 04:15 PM
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i got my injectors from the scrapyard for a few bucks and another buck or so for the o-rings.

i got lucky and found some nice ones, didn't clean them, test them or rebuild them, (no pintle caps available).
best upgrade this year.
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Old 08-28-2012 | 04:29 PM
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Originally Posted by caged
i got my injectors from the scrapyard for a few bucks and another buck or so for the o-rings.

i got lucky and found some nice ones, didn't clean them, test them or rebuild them, (no pintle caps available).
best upgrade this year.
same here pulled around 10 703 picked the best looking 8 and threw 6 in works much better than original ....
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Old 08-28-2012 | 04:33 PM
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Originally Posted by 88jx
I know there has been a lot of other threads about rough idle but i've tried almost everything and nothing has helped. It's an 88 with 4.0 AW4 just hit 100,000 over the last 5,000 miles replaced, cap+rotor, plugs+wires, 02 sensor, tps all fluids and filters, pcv valve, vacuum harness cleaned throttle body and iac. It's seems to run worse when the engines cold and if i rev the engine and then let off it will almost stall, but if im giving it gas it will run perfect it's only rough at idle whether im in park, reverse, neutral or drive any help would be appreciated
ive also ran seafoam through it a few times
Is idle low or is there a miss causing low idle? Was work done b4 issue or after ?
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Old 08-28-2012 | 04:41 PM
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Originally Posted by XJ.89.Limited
How much do the injectors run? And yup, I have a tach.
Contact programbo here on CF.

https://www.cherokeeforum.com/members/programbo-3309/
Last edited by cruiser54; 08-28-2012 at 04:44 PM.
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Old 08-28-2012 | 04:42 PM
  #26  
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Originally Posted by freegdr
Is idle low or is there a miss causing low idle? Was work done b4 issue or after ?
idle is rough but not like it's missing, once the engine arms up it idles a LOT better. all the work was done after issue. i did just order a set of injectors from a 2.4 dodge stratus off ebay so i just have to wait now
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Old 08-28-2012 | 04:45 PM
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did you check manifold bolts see if there loose better to do when engine is cold ?
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Old 08-28-2012 | 06:21 PM
  #28  
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ya i checked the manifold bolts, they're pretty snug. I'm thinkin it's probably just the injector so i'll have the new ones by this weekend and see how much it helps
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Old 08-28-2012 | 06:23 PM
  #29  
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yes those old injectors need ta go low idle to me sounds like iac motor issues to me while waiting on injector ig check it out also
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Old 08-28-2012 | 06:26 PM
  #30  
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this is worth itweight in gold for renix...https://www.cherokeeforum.com/f51/he...ix-links-1397/
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