87 2.5l yj loss of power - JeepForum.com
 
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post #1 of 4 Old 09-22-2018, 03:02 AM Thread Starter
SinisterNM
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1987 YJ Wrangler 
 
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Location: forestville
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87 2.5l yj loss of power

hi, ive been having this issue where my jeep (1987 2.5l renix tbi wrangler) losses power while just driving down the road, seems like all of a sudden the spark plugs are getting no power. if i throttle up sometimes it just backfires then continues on(blew up a muffler with that though), sometimes i have to drop down a gear and roll start the engine and if i cant do either it just rolls to a stop then doesn't start for a few minutes. its happened before i even went anywhere a couple times and i pulled the spark plug and there was no spark. ive checked the connection and parts from the coil to the spark plugs and all seems good. anyone have any insight for me?

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post #2 of 4 Old 09-22-2018, 07:02 AM
bruinjeeper
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1995 YJ Wrangler 
 
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what type of plugs are you using?

How did they look?

Stop whining about the 'ride' - If your YJ ain't wrangling your soul free, then might I suggest you buy a stationwagon... at least you can fit all your bull**** in the back.
~YJOTM MAY '16~
~YJOTM JULY '19~
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post #3 of 4 Old 09-22-2018, 03:26 PM
LJameson
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1990 YJ Wrangler 
 
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Most likely if you are not getting Spark it’s a crank sensor.

1990 YJ
1976 CJ7
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post #4 of 4 Old 09-24-2018, 01:59 PM Thread Starter
SinisterNM
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1987 YJ Wrangler 
 
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Location: forestville
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champion plugs, standard. look good. any way to test the crank sensor?
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1987 , 2.5l , backfire , stalling , TBI

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