 |
10-11-2007, 11:43 AM
|
#1
|
Join Date: Sep 2007
Location: Poconos, PA
Posts: 606
|
Harsh Idle
my 96 z decides it want sto idle rough after long drives. More specifically it was at its worst this last weekend when i drove back form philly and had no traffic a good open run and then suddenly bam right as im getting off to teaneck cars everywhere. Starts shaking like a ***** at idle but no other time. ive had checked the codes with a professional scanner and all i get is a weird evap code. plugs are brand new, and i just did the fuel pump .... it was doing this before the fuel pump so i know thats not it. also notice when i do a regular launch out of 1st gear( meaning not driving like a nut) it vibrates....
tranny mount? engine mount.... i cant afford the labor on a distributor and wouldnt it come up in a code?
__________________
'96 Z28 Vert M6 - UMI LCA's,UMI SFC's,BMR Panhard rod(soon to be UMI),UMI Short Shifter,Custom clutch, SLP CAI, SLP Strut Brace, Skip Shift Elim, MagnaFlow Catback,160 stat, Tb bypass, Air Foil ,prothane motor mounts & tranny mount, Stainless Radiator Shroud, Hooker headers with magnaflow hiflo cats, brand spanking new tranny, Umi torque arm , C5 brakes all 4 corners .
Soon to come... New paint , and glass .
|
|
|
|
10-11-2007, 04:30 PM
|
#2
|
|
Co-Founder / Site Admin
Join Date: Jul 2004
Location: Ewing, NJ
Posts: 22,473
|
I doubt that it's a tranny or motor mount....you would most likely feel the effects of either of those the most when "driving like a nut"
- Justin
__________________
1999 Camry - Beigemobile DD
2002 Suburban - Wife's DD
2004 Grand Cherokee - Not running / Project / Selling?
|
|
|
|
|
10-11-2007, 08:02 PM
|
#3
|
|
Resident Camera Guy
Join Date: Aug 2004
Location: North Jersey
Posts: 10,971
|
Does it feel like its breaking up the higher into the RPM's you go?
__________________
|
|
|
|
|
10-11-2007, 08:16 PM
|
#4
|
|
Hippy Mod, Bergermeister Meisterberger, Moderator
Join Date: Aug 2004
Location: Ewing
Posts: 6,213
|
You might have a vacuum leak at one of the evap hoses which is allowing too much extra air in at idle. Also, check the rubber intake elbow for rips or tears where air can get in past the MAF. Check to see if you can suck or blow air through the evap line up near the intake. But be careful, you might get a mouth full of dried out charcoal if the cannister is going bad. Don't ask me how I know! 
__________________
69 Z28 JL8 4 wheel disc brakes - being restored
09 Silverado Z71
|
|
|
|
|
10-11-2007, 08:30 PM
|
#5
|
Join Date: Sep 2007
Location: Poconos, PA
Posts: 606
|
hmm the code is an evap code so ill check thanks
__________________
'96 Z28 Vert M6 - UMI LCA's,UMI SFC's,BMR Panhard rod(soon to be UMI),UMI Short Shifter,Custom clutch, SLP CAI, SLP Strut Brace, Skip Shift Elim, MagnaFlow Catback,160 stat, Tb bypass, Air Foil ,prothane motor mounts & tranny mount, Stainless Radiator Shroud, Hooker headers with magnaflow hiflo cats, brand spanking new tranny, Umi torque arm , C5 brakes all 4 corners .
Soon to come... New paint , and glass .
|
|
|
|
|
10-12-2007, 10:04 AM
|
#6
|
|
Sliderule / Moderator
Join Date: Oct 2004
Location: Catawissa PA
Posts: 2,294
|
Check the EGR valve too, that dang thing will make the ECM throw all kinds of oddball codes.
__________________
93Z M6 Black: The 385 Lives! Supercharged, 3-core front mount intercooler, GTP heads, 3:73's, Street twin clutch, Jethot Longtubes, Mufflex 4" catback/spintech, S+W cage, Spohn Suspenion, Yada Yada Yada
1) Build it
2) Race it
3) Break it
4) Repeat!!!
|
|
|
|
|
10-12-2007, 01:40 PM
|
#7
|
Join Date: Sep 2007
Location: Poconos, PA
Posts: 606
|
im starting to get ideas about a carbeurated 400 and get rid off all this silly egr/air/computer..... who knows need a job and a beater first
__________________
'96 Z28 Vert M6 - UMI LCA's,UMI SFC's,BMR Panhard rod(soon to be UMI),UMI Short Shifter,Custom clutch, SLP CAI, SLP Strut Brace, Skip Shift Elim, MagnaFlow Catback,160 stat, Tb bypass, Air Foil ,prothane motor mounts & tranny mount, Stainless Radiator Shroud, Hooker headers with magnaflow hiflo cats, brand spanking new tranny, Umi torque arm , C5 brakes all 4 corners .
Soon to come... New paint , and glass .
|
|
|
|
|
10-15-2007, 01:55 PM
|
#8
|
Join Date: Sep 2007
Location: Poconos, PA
Posts: 606
|
my cousins gonna scan teh comp and get the cde for me tommorrow night and ill post it to see if anyone is familiar with it... meanwhile im going out to the garage to see if i can find a leak somewheres
__________________
'96 Z28 Vert M6 - UMI LCA's,UMI SFC's,BMR Panhard rod(soon to be UMI),UMI Short Shifter,Custom clutch, SLP CAI, SLP Strut Brace, Skip Shift Elim, MagnaFlow Catback,160 stat, Tb bypass, Air Foil ,prothane motor mounts & tranny mount, Stainless Radiator Shroud, Hooker headers with magnaflow hiflo cats, brand spanking new tranny, Umi torque arm , C5 brakes all 4 corners .
Soon to come... New paint , and glass .
|
|
|
|
|
10-17-2007, 03:01 PM
|
#9
|
|
Sliderule / Moderator
Join Date: Oct 2004
Location: Catawissa PA
Posts: 2,294
|
Look at the basics first; How old are , wires, fuel filter and PVC valve and air filter?
Maybe the ICV is dirty, might just need to take off the throttle body and clean the ports?
__________________
93Z M6 Black: The 385 Lives! Supercharged, 3-core front mount intercooler, GTP heads, 3:73's, Street twin clutch, Jethot Longtubes, Mufflex 4" catback/spintech, S+W cage, Spohn Suspenion, Yada Yada Yada
1) Build it
2) Race it
3) Break it
4) Repeat!!!
|
|
|
|
|
10-19-2007, 01:57 PM
|
#10
|
Join Date: Sep 2007
Location: Poconos, PA
Posts: 606
|
Quote:
Originally Posted by Pampered-Z
Look at the basics first; How old are , wires, fuel filter and PVC valve and air filter?
Maybe the ICV is dirty, might just need to take off the throttle body and clean the ports?
|
wires need replacing , everything else is brand new and the throttle body got cleaned out less than a year ago...er i ned to do fuel filter and wores... just did egr valve yesterday. i have the filter and wires... not looking forward to the wires lol
ok just went out to do wires and fuel filter.... dont have the patience fo rthe wires and my fuel filter is rusted on .... cant get that nut off . even sprayed a ton of yield on there let it soak for a few minutes and it still wont com eoff 
__________________
'96 Z28 Vert M6 - UMI LCA's,UMI SFC's,BMR Panhard rod(soon to be UMI),UMI Short Shifter,Custom clutch, SLP CAI, SLP Strut Brace, Skip Shift Elim, MagnaFlow Catback,160 stat, Tb bypass, Air Foil ,prothane motor mounts & tranny mount, Stainless Radiator Shroud, Hooker headers with magnaflow hiflo cats, brand spanking new tranny, Umi torque arm , C5 brakes all 4 corners .
Soon to come... New paint , and glass .
Last edited by nj96z28; 10-19-2007 at 04:15 PM.
Reason: sigh
|
|
|
|
|
10-20-2007, 10:05 AM
|
#11
|
|
Co-Founder / Site Admin
Join Date: Jul 2004
Location: Ewing, NJ
Posts: 22,473
|
Quote:
Originally Posted by nj96z28
ok just went out to do wires and fuel filter.... dont have the patience fo rthe wires and my fuel filter is rusted on .... cant get that nut off . even sprayed a ton of yield on there let it soak for a few minutes and it still wont com eoff |
spray it with PB Blaster every day for a week.....shouldn't have a problem then.
- Justin
__________________
1999 Camry - Beigemobile DD
2002 Suburban - Wife's DD
2004 Grand Cherokee - Not running / Project / Selling?
|
|
|
|
|
10-22-2007, 10:38 PM
|
#12
|
Join Date: Feb 2007
Location: hamilton nj / glassboro nj
Posts: 916
|
Quote:
Originally Posted by Pampered-Z
Check the EGR valve too, that dang thing will make the ECM throw all kinds of oddball codes.
|
agreed i had a 24x loss of signal on the ignition system when im reality my egr was bad
__________________
I am the artist formerly known as 95 red slp 
|
|
|
|
|
11-11-2007, 06:14 PM
|
#13
|
Join Date: Sep 2007
Location: Poconos, PA
Posts: 606
|
well i put the new EGR in and the harsh idle situation is gone . ty all for the suggestions. They really put that EGR in a extra special place on these lt1 f-bodies lol.
__________________
'96 Z28 Vert M6 - UMI LCA's,UMI SFC's,BMR Panhard rod(soon to be UMI),UMI Short Shifter,Custom clutch, SLP CAI, SLP Strut Brace, Skip Shift Elim, MagnaFlow Catback,160 stat, Tb bypass, Air Foil ,prothane motor mounts & tranny mount, Stainless Radiator Shroud, Hooker headers with magnaflow hiflo cats, brand spanking new tranny, Umi torque arm , C5 brakes all 4 corners .
Soon to come... New paint , and glass .
|
|
|
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
|
|
|
