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02-11-2009, 09:14 AM
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#1
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Join Date: Mar 2007
Location: Haddon Heights NJ
Posts: 133
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Need Help! My Car idles rough in drive and park.
My car runs rough from time to time in idle when in drive or park. No check engine light Ever! other then that the car runs great . When i start to accelerate its a little choppy especially after the car has been running for a good bit and when its either hot or humid. then after i get past 12 1300 rpms then it's back to normal. I think it might be an EGR problem but im not sure at all. Can someone help?
My Car
1999 Camaro SS LS-1 346ci ALL STOCK
67,000 Miles
I purchased it with 60,500 miles and have owned it for exactly 2 years.
Thanks in advance!!!
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02-11-2009, 10:28 AM
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#2
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Hippy Mod, Bergermeister Meisterberger, Moderator
Join Date: Aug 2004
Location: Ewing
Posts: 6,214
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I have a Diablosport programmer that can scan for codes and watch some of the sensors while it's running if you want to check the car out. I actually have a spare EGR as well if you wanted to try it for testing.
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69 Z28 JL8 4 wheel disc brakes - being restored
09 Silverado Z71
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02-11-2009, 10:31 AM
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#3
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Join Date: Mar 2007
Location: Haddon Heights NJ
Posts: 133
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yeah that would be great actually!
have you heard of this problem before?
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02-11-2009, 10:57 AM
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#4
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Hippy Mod, Bergermeister Meisterberger, Moderator
Join Date: Aug 2004
Location: Ewing
Posts: 6,214
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It sounds similar to an EGR problem but could be something else like plugs or wires. My car ran like that after I did the header install and forgot to put plug wire #8 back on the plug! 
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69 Z28 JL8 4 wheel disc brakes - being restored
09 Silverado Z71
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02-11-2009, 11:00 AM
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#5
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Join Date: Mar 2007
Location: Haddon Heights NJ
Posts: 133
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yeah, just weird cuz i have no mods
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02-11-2009, 12:10 PM
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#6
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Join Date: May 2008
Location: Roselle Park, NJ
Posts: 173
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pull a plug out and see what they look like...the car may have sat for a while before you bought it and could have fouled plugs.
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-Jay-
COD-MW2=X02ssMaroX XBOX LIVE 
02 SOMSS-M6-,Volant CAI,TR55's,UMI LCA'S and PHR, Longtubes & TD's w/ sweet thunder bullets 315-35/17's. 349rwhp/372rwtq
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02-11-2009, 12:11 PM
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#7
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10 Second Club
Join Date: Feb 2008
Location: Eatontown
Posts: 1,647
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The sensors in the MAF might be dirty, or you need new plugs. When is the last time you changed the plugs if ever?
It might also be a shot O2 sensor, but I think you would throw a code for that.
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1999 C5 FRC: 12.7@114
2008 TBSS: 12.48@108
2017 Silverado 2500 do you even lift breh?
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02-11-2009, 01:50 PM
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#8
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Join Date: Mar 2007
Location: Haddon Heights NJ
Posts: 133
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thanks guys def appreciate your help , if anyone has anything more to add please let meknow
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02-11-2009, 03:19 PM
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#9
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12 Second Club
Join Date: Aug 2004
Location: Oradell
Posts: 8,370
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i have the same prob... only happens at low idle and when the cars hot. like at a stop light it will lurch forward and the settle down.... weird
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88 Camaro
95 Impala SS
97 Trans Am WS6
98 Blazer ZR2
00 Corvette
04 CTS-V
04 Grand Cherokee
07 Sublime Charger Daytona
09 Grand Cherokee Limited HEMI
12 Tahoe LT
17 Malibu LT
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02-11-2009, 04:12 PM
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#10
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Join Date: Mar 2007
Location: Haddon Heights NJ
Posts: 133
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thats EXACTLY my problem !!! GRRRRR
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02-11-2009, 04:33 PM
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#11
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Join Date: Jul 2008
Location: Columbia
Posts: 928
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Choke issues?
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Praise the Lowered
67' Camaro - Worked 327, Hotchkis TVS suspension, 4 wheel cross drilled discs, AM radio FTL
05' Silverado - Stock, stock, and stock.
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02-11-2009, 05:13 PM
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#12
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Co-Founder / Site Admin
Join Date: Jul 2004
Location: Ewing, NJ
Posts: 22,476
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Does the check engine light come on when you first start the car? If not, then the bulb is prolly bad you may actually have codes.
- Justin
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1999 Camry - Beigemobile DD
2002 Suburban - Wife's DD
2004 Grand Cherokee - Not running / Project / Selling?
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02-11-2009, 05:15 PM
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#13
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Join Date: Mar 2007
Location: Haddon Heights NJ
Posts: 133
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the check engine light does come on
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02-11-2009, 07:08 PM
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#14
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12 Second Club
Join Date: Aug 2004
Location: Oradell
Posts: 8,370
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yes it does... has never thrown a code either
__________________
88 Camaro
95 Impala SS
97 Trans Am WS6
98 Blazer ZR2
00 Corvette
04 CTS-V
04 Grand Cherokee
07 Sublime Charger Daytona
09 Grand Cherokee Limited HEMI
12 Tahoe LT
17 Malibu LT
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02-11-2009, 07:17 PM
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#15
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Hippy Mod, Bergermeister Meisterberger, Moderator
Join Date: Aug 2004
Location: Ewing
Posts: 6,214
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Quote:
Originally Posted by ShowtimeSteeleLS1SS
the check engine light does come on
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If you want to stop by one day we can check the car out on the scanner. I'm on the border of Ewing and Titusville so I'm not that far from you.
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69 Z28 JL8 4 wheel disc brakes - being restored
09 Silverado Z71
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02-11-2009, 08:22 PM
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#16
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Join Date: Mar 2007
Location: Haddon Heights NJ
Posts: 133
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Quote:
Originally Posted by JL8Jeff
If you want to stop by one day we can check the car out on the scanner. I'm on the border of Ewing and Titusville so I'm not that far from you.
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that would be awesome! thx , im going to put the car back on reg insurance pretty soon and when i do ill def do that.
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02-11-2009, 08:23 PM
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#17
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Join Date: Mar 2007
Location: Haddon Heights NJ
Posts: 133
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when i said the light comes on i just meant at start up then turns off, so i dont know if the scanner will bring anything up.
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02-11-2009, 09:14 PM
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#18
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Hippy Mod, Bergermeister Meisterberger, Moderator
Join Date: Aug 2004
Location: Ewing
Posts: 6,214
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If there are old codes they might still show up. And if there are any not ready conditions they will show up as well.
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69 Z28 JL8 4 wheel disc brakes - being restored
09 Silverado Z71
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02-25-2009, 08:42 AM
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#19
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Join Date: Mar 2007
Location: Haddon Heights NJ
Posts: 133
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bump
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02-25-2009, 03:42 PM
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#20
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Join Date: Mar 2007
Location: Haddon Heights NJ
Posts: 133
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for those who said there take a look at it or scan it i just got my car back on the road today so whenever any of you can let me swing by the would be great! the sooner the better .
Thanks
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02-26-2009, 07:55 AM
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#21
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Hippy Mod, Bergermeister Meisterberger, Moderator
Join Date: Aug 2004
Location: Ewing
Posts: 6,214
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If you want to stop by after work one day or over the weekend we can scan it and you can try swapping the EGR if you want to see if that eliminates it.
__________________
69 Z28 JL8 4 wheel disc brakes - being restored
09 Silverado Z71
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02-26-2009, 07:30 PM
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#22
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Join Date: Mar 2007
Location: Haddon Heights NJ
Posts: 133
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Quote:
Originally Posted by JL8Jeff
If you want to stop by after work one day or over the weekend we can scan it and you can try swapping the EGR if you want to see if that eliminates it.
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yeah just let me know im available anyday, what is ever best for you. The sooner the better though. Thanks appreciate it
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02-28-2009, 03:32 PM
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#23
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Hippy Mod, Bergermeister Meisterberger, Moderator
Join Date: Aug 2004
Location: Ewing
Posts: 6,214
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Hopefully that vacuum leak was the only problem. How was it running after driving it home and giving it a chance to clear itself out? It was interesting watching the computer try to compensate for the extra air getting in and then going into limp mode to balance it back out. I'll look for the replacement pcv valve part # I grabbed for my car.
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69 Z28 JL8 4 wheel disc brakes - being restored
09 Silverado Z71
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03-01-2009, 12:22 PM
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#24
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Join Date: Mar 2007
Location: Haddon Heights NJ
Posts: 133
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Quote:
Originally Posted by JL8Jeff
Hopefully that vacuum leak was the only problem. How was it running after driving it home and giving it a chance to clear itself out? It was interesting watching the computer try to compensate for the extra air getting in and then going into limp mode to balance it back out. I'll look for the replacement pcv valve part # I grabbed for my car.
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it seemed to be running better for sure!! Thanks alot i appreciate it! alright yea let me know if your find the part #
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