4 hole injectors and plug gap ? - Page 2 - JeepForum.com

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post #16 of 18 Old 09-06-2013, 03:47 PM
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1990 MJ Comanche 
Join Date: Oct 2009
Location: Prescott
Posts: 11,191
Originally Posted by Terry777 View Post
At least I warned it was a stupid question

Sure I`ve looked at it before wtf, not sure why that never registered. I got lost somewhere reading up about coil upgrades and the knot stuck...

Changed my plugs last night found the distributer cap and rotor covered in soot and worn beyond sand paper repair so off to Lordco for the brass...

I did the usual stupid move, got frustrated with one of the wires in a cramped area 3rd from the rear and yanked from the wire and boot together, the wired slipped right out with the end still on the plug. I had a large angled needle nose right beside me to...

Easy enough fix clamped the wire back into place but now the silicone seal is turfed, sounds fine can`t hear it missing...
Should I bother upgrading wires there NGK, look & feel new but are probably the stock cheap replacements.

I'd do new wires.

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post #17 of 18 Old 09-07-2013, 01:29 AM Thread Starter
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1997 XJ Cherokee 
Join Date: Oct 2010
Location: Coquitlam
Posts: 121
Originally Posted by cruiser54 View Post
DEFINITELY. Your Jeep has a coil.

Do the tune-up stuff before getting off on this coil rabbit trail.
Great advise thanks, I`m keeping it stock as possible it has more than enough power for me I don`t tow or do mud flats...

Lordco priced me NGK wires at $30 so that's a go...
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post #18 of 18 Old 09-09-2013, 09:01 PM Thread Starter
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1997 XJ Cherokee 
Join Date: Oct 2010
Location: Coquitlam
Posts: 121
New plugs made very noticeable change could be due to the olds being gaped between 40 & 45 mm they weren`t dirty or malfunctioning, looked like used ones should...

At idle Nice clean tick tick tick, sounds like an engine should no doubt my air box hack is helping the engine sound like it should due to it getting the air it wants...

New wires cap & rotor with brass, sounds even meaner...

Huge difference WOT tuned just right Throttle response very noticeable gains.

I`ll get back about the MPG gains later and before I put in the new injectors

I wanted to get all the sensors cleaned and tune up done before hand so I could get a more detailed read of the MPG gains of new injectors without having to guess if the others had anything to do with it...
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