This problem just started a few days again, after doing some runs at the track my car sounded really bad at idle, seemed like it was misfiring if the revs were under 2k. Above that, its fine, but it will almost stall out while idling, idle rough, and missfire while im trying to get going. After a bit of (soft) driving it will go away. Any ideas?


d16z6
zex 59300 cam
p28
intake, header, stock exhaust
92 cx hatch untuned

 

maybe you melted a piston ringland. Thats how my turbo Si went down.
B

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 99CivicSiBrian &raquo;</TD></TR><TR><TD CLASS="quote">maybe you melted a piston ringland. Thats how my turbo Si went down.
B</TD></TR></TABLE>

It only does it immediately after I beat on the car though, it will drive fine when I normally drive like a grandmom.

 

Did it reallllll bad this morning too.

RE-CAP
92 cx hatch, d16z6, zex 59300, Stock p28 maps, intake,header, stock exhaust.

Car runs rediculously rich, and it idles like **** after its beat on.

 

Anything guys? Changed plugs, checked cap and rotor..still doing it.

 

rec doing a compression test or leak down test may bent a valve

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CASTUDILLO01 &raquo;</TD></TR><TR><TD CLASS="quote">rec doing a compression test or leak down test</TD></TR></TABLE>

yeah

 

sounds like a bent valve, compression test

 

Since so many have recommended it I might do a comp test, but why would a bent valve only become noticeable after I drive the car hard? The car is 100% fine when I drive it normal.

And also, the misfiring doesnt gradually get better, if I let it idle for a few minutes, it will crossover to a stock perfect idle from the rough lumpy misfire idle quickly not gradually.