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Ideal Spark Plugs for 4.0 ?

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Old Nov 8, 2010 | 01:44 PM
  #16  
gmv93's Avatar
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From: AnkaraTurkey
Year: 1997
Model: Grand Cherokee
Engine: 4.0
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on this car, no i did not. this conversion had been done professionally. it is usual thing here. on my previous car, on V6 pathfinder, it was a mixer type system and i re installed everything after that stupid service shop installed it with lots of problems.

I took few photos to show you components and application today, but there was no time due to lots of work in office to finish. i will try to write explanations and i will mark photos tomorrow (i hope)

and i will try to record a small movie clip with mobile phone to see and hear the system. actually you will see no difference but you will hear LPG injectors clicking.
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Old Nov 8, 2010 | 02:08 PM
  #17  
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From: Milwaukee, WI
Year: 1987
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Nice, I am interested in this as well. If you could post the link to the thread you start for the conversion I'd really appreciate it!

It'll be easier to find if you do!!
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Old Nov 8, 2010 | 03:45 PM
  #18  
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From: Harleysville, PA
Year: 1998
Model: Cherokee
Engine: 4.0L I6 Powertech
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^^^ X2 start a thread and shoot us a link here!
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Old Nov 10, 2010 | 02:13 PM
  #19  
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From: AnkaraTurkey
Year: 1997
Model: Grand Cherokee
Engine: 4.0
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Here is your thread:

https://www.cherokeeforum.com/f5/lpg...systems-65184/
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Old Nov 12, 2010 | 11:00 AM
  #20  
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From: Milwaukee, WI
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Awesome, man, thank you so much for doing this! I'll be subscribing to that thread as well!
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Old Nov 18, 2010 | 03:06 PM
  #21  
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From: AnkaraTurkey
Year: 1997
Model: Grand Cherokee
Engine: 4.0
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you are welcome. please ask anything you want to know about subject, i will answer if i am able to.
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Old Nov 18, 2010 | 03:11 PM
  #22  
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From: AnkaraTurkey
Year: 1997
Model: Grand Cherokee
Engine: 4.0
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Originally Posted by gmv93
I am using stock plugs which are stated on users manual but problem is, i am using LPG instead of Gasoline and this requires the tighter gap at tip. Any information? LPG has higher octane rating when compared to gasoline(actually it is not called octane for LPG but it is not important)

What is stock gap for gasoline? Which alternative brands can be used with 4.0 engine? it is 97 ZJ 4.0.

I measured stock champion branded plugs, it turned out to be something like 0.9 mm. i re adjusted 5 of them (#1 one is not easy to unplug) to 0.8 mm for LPG usage. car runs quiter now. i think it will consume little less fuel than before.
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