99 LS1 Camaro rough low rpms
05-21-2013, 12:38 PM
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99 LS1 Camaro rough low rpms Hi guys
My 99 LS1 Camaro has rough low rpms. That means if I'm on brake (and Drive gear) or have up to aprox. 1500 rpm (and Park or Neutral one) it struggles, as you can see in the movie.
I've changed sparks, cables, checked coils (I've switched one by one with new one), nothing helps.
Would be grateful for any clues, I'm getting out of ideas and I don't want to change half of engine without diagnostic... So what possible can I check now, how to do it?
Thanks
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My 99 LS1 Camaro has rough low rpms. That means if I'm on brake (and Drive gear) or have up to aprox. 1500 rpm (and Park or Neutral one) it struggles, as you can see in the movie.
I've changed sparks, cables, checked coils (I've switched one by one with new one), nothing helps.
Would be grateful for any clues, I'm getting out of ideas and I don't want to change half of engine without diagnostic... So what possible can I check now, how to do it?
Thanks
View My Video
05-21-2013, 01:11 PM
#2
need more info. is this a recent thing or has the car always done this? is this car completely stock? how many miles? any mods or changes to intake/throttlebody? throwing any codes?
my first guess would be a bad or sticking idle air control valve. i would replace or clean the valve/throttlebody. it should be idling right around 800 rpm rather than 5/400 like it is
my first guess would be a bad or sticking idle air control valve. i would replace or clean the valve/throttlebody. it should be idling right around 800 rpm rather than 5/400 like it is
05-22-2013, 02:58 PM
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need more info. is this a recent thing or has the car always done this? is this car completely stock? how many miles? any mods or changes to intake/throttlebody? throwing any codes?
my first guess would be a bad or sticking idle air control valve. i would replace or clean the valve/throttlebody. it should be idling right around 800 rpm rather than 5/400 like it is
my first guess would be a bad or sticking idle air control valve. i would replace or clean the valve/throttlebody. it should be idling right around 800 rpm rather than 5/400 like it is
i've already cleaned air control valve
that's info - I dind't know about 800
maybe it's time to replace air control valve...
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05-22-2013, 03:02 PM
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05-22-2013, 08:46 PM
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I have to apologize I inadvertently lied to you a little bit. I mixed up my cars My 02 408 ta sits at 800rpm....
. My completely stock 2002 a4 z28 sits at 600 rpm after the idle settles. So you aren't far off maybe just needs more cleaning or you do need to replace the control valve. If you need a temporary fix there's an idol set screw under the throttle pivot .
. My completely stock 2002 a4 z28 sits at 600 rpm after the idle settles. So you aren't far off maybe just needs more cleaning or you do need to replace the control valve. If you need a temporary fix there's an idol set screw under the throttle pivot .
05-23-2013, 07:17 AM
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Sometimes they don't throw codes.Was it ever tuned before? Someone could have turned off the codes. If you could get someone to scan your car you could narrow down the problem. D14Hugger asked if your fuel mileage is bad.That could help narrow down your problem.
05-23-2013, 12:10 PM
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I've scanned using few devices , nothing is being shown from electronic, no errors
ok - regarding fuel mileage - in general it seems fine, I will check this thoroughly
05-23-2013, 12:22 PM
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I have to apologize I inadvertently lied to you a little bit. I mixed up my cars My 02 408 ta sits at 800rpm....
. My completely stock 2002 a4 z28 sits at 600 rpm after the idle settles. So you aren't far off maybe just needs more cleaning or you do need to replace the control valve. If you need a temporary fix there's an idol set screw under the throttle pivot .
. My completely stock 2002 a4 z28 sits at 600 rpm after the idle settles. So you aren't far off maybe just needs more cleaning or you do need to replace the control valve. If you need a temporary fix there's an idol set screw under the throttle pivot .
so I think I'll order one and check this again
05-23-2013, 12:24 PM
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