Rough idle after burnout?
#1
Thread Starter
CF Veteran
Joined: Apr 2014
Posts: 1,181
Likes: 59
From: Florida
Year: 1999
Model: Cherokee
Engine: 4.0l
Rough idle after burnout?
So as the title states as a final goodbye to the house were moving from the gf of course wouldnt let me do a goodbye burnout in the backyard and tear the grass up so i improvised and used the piece of plywood to burnout on. So after having my fun and gf not impressed i went to the driveway and shut it down to go inside and button up a few more things and get leftover things and once i got everything i went to start it back up and once i hit the starter it sounded like it absolutely had no compression but started right up and sounded like it was misfiring. You really couldnt feel it but you could hear it. So first thing was to look at the oil pressure and temp gauge the oil was fine but the temp was a little hotter than whats comfortable but plenty away from overheating. But after letting it idle a little and cooling down it was rough still so i said screw it and shut it off and restarted it and poof started like it normally did and idled rough a little but after a little drive around the block and parked again it smoothed itself out and has been fine the rest of the night with no misfiring or rough idle. Any ideas?
#4
CF Veteran
Joined: Dec 2015
Posts: 2,139
Likes: 91
From: Syracuse, NY
Year: 1996
Model: Cherokee (XJ)
Engine: 4.0L
Probably just got the fuel trim values out of wack (wide open throttle, short drive cycle, etc.) So when you restarted it started with some bad values and needed a little time to smooth out and begin compensating correctly again (its based on a short term and long term average so a wack long term number can take a few minutes to settle out). Just a guess.
#5
Thread Starter
CF Veteran
Joined: Apr 2014
Posts: 1,181
Likes: 59
From: Florida
Year: 1999
Model: Cherokee
Engine: 4.0l
thats what i figured it had to be a sensor or something not major like bent valves or itll still be doing it. I know burnouts strain engines and can damage the valvetrain after so long but it was short just enough to get some tire smoke lol. Just odd when it sounded like it had no compression thats what worried me the most.
#6
thats what i figured it had to be a sensor or something not major like bent valves or itll still be doing it. I know burnouts strain engines and can damage the valvetrain after so long but it was short just enough to get some tire smoke lol. Just odd when it sounded like it had no compression thats what worried me the most.
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#8
#9
CF Veteran
Joined: Nov 2017
Posts: 2,419
Likes: 250
From: Southern Texas (former AZ & Aus)
Year: 1999
Model: Cherokee(XJ)
Engine: I6 4.0L
Please correct me if I'm wrong... but aren't the I6 4.0's an interference motor? For some reason I thought they were. So if it would be SAD times at Ridgemont High. lol.
#12
Thread Starter
CF Veteran
Joined: Apr 2014
Posts: 1,181
Likes: 59
From: Florida
Year: 1999
Model: Cherokee
Engine: 4.0l
Well must of been that one time and some heat soak lol. Thoroughly enjoyed the goodbye and even smells like burnt rubber inside so im happy. Small question but what is heat soak exactly?
#13
CF Veteran
Joined: Jun 2016
Posts: 2,929
Likes: 5
From: York PA
Year: 2001
Model: Cherokee
Engine: 4.0 Litre I6
it’s when you catch a fire Pokémon and the high temp levels of the Pokémon slightly warp the pokeball out of round.
#14
Thread Starter
CF Veteran
Joined: Apr 2014
Posts: 1,181
Likes: 59
From: Florida
Year: 1999
Model: Cherokee
Engine: 4.0l