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Old 04-08-2012, 07:17 PM
Join Date: Mar 2012
Posts: 11
Default 99 accord SURGING IDLE

I did every check. Clean the whole intake manifold. Bite the bullet and buy the expensive IACV but still surging idle persist. No check engine light though. Car runs very well in the freeway too....replace TPS too ....anything guys I appreciate I want to tackle this not to skip or ignore the problem.
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Old 04-11-2012, 12:45 PM
Junior Member
Join Date: Mar 2012
Posts: 37

Did you spray carb cleaner on the hoses and around the gasket areas for the intake? An air leak is most likely your problem and could've saved you lots of money if that is the cause.
1986 Honda CRX- sold
1999 Honda Accord coupe- h23a swap
1997 Ford F350 crew cab long bed- sold
1996 Ford Explorer- fun little SUV!
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Old 04-11-2012, 03:05 PM
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Join Date: May 2006
Location: Ohio
Posts: 15,828

You did EVERY check?

Air in cooling system?
Clean throttle body bore & throttle plate?
Throttle closes COMPLETELY?

Did you set the BASE idle? (or did you simply try to adjust the operating idle)
'05 Saab 9x aero (RIP)
'09 Saab 9ss
'10 Saab 9sc
my kids have Civics
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Old 04-11-2012, 03:05 PM

1999, 99, accord, adjust, bouncing, check, civic, engine, honda, iacv, idle, remove, surge, surging, tps

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