Firebird Nation: Sputtering problem.. - Firebird Nation

Jump to content

FirebirdNation.com is the premier Pontiac Firebird forum on the internet. Supporting Members do not see the above ads.
  • 2 Pages +
  • 1
  • 2
  • You cannot start a new topic
  • You cannot reply to this topic

Sputtering problem.. Rate Topic: -----

#1 User is offline   96lt12011 

  • Pontiac Firebird Oil Changer
  • PipPipPip
  • View gallery
  • Group: Full Member
  • Posts: 137
  • Joined: 15-September 11
  • Gender:Male
  • First Name:chris
  • City:nampa
  • State or Province:ID
  • Country:USA
  • Year: 1996
  • Make: pontiac
  • Model: trans am
  • Engine: lt1
  • Transmission: 4L60E

Posted 11 August 2012 - 10:59 AM

I recently replace plugs and wires on my stock lt1, i switched to the MSD 8.5mm super conductor wires. Now my problem is that it starts up fine and runs fine in park and nuetral, but when put in any gear it sputters. Could this be a swithced wire on the optispark? No CES codes either
0

#2 User is online   GaryDoug 

  • Ramblin' Wreck
  • PipPipPipPipPipPipPip
  • View gallery
  • Group: Full Member
  • Posts: 3,463
  • Joined: 31-May 11
  • Gender:Male
  • First Name:Gary
  • City:Florida West Coast
  • State or Province:FL
  • Country:USA
  • Interests:EE from Ga Tech, but I can't fix your TV, so don't ask ;-)
  • Year: 1998
  • Make: Pontiac
  • Model: Trans Am
  • Engine: 5.7L LS1
  • Transmission: 4L60-E Auto

Posted 11 August 2012 - 11:18 AM

Try running the engine again. Make sure (....gas tank is over 10% full and .. oops probably not pertinent to a 95 or 96) that you keep the throttle steady for a few seconds at least. That way any misfire codes that might be pending will get set. It takes at least two ignition cycles to set the MIL for misfire codes.

This post has been edited by GaryDoug: 11 August 2012 - 11:23 AM

1998 Trans Am - Bright Red - all stock and almost all original - one owner - driven daily.
0

#3 User is offline   96lt12011 

  • Pontiac Firebird Oil Changer
  • PipPipPip
  • View gallery
  • Group: Full Member
  • Posts: 137
  • Joined: 15-September 11
  • Gender:Male
  • First Name:chris
  • City:nampa
  • State or Province:ID
  • Country:USA
  • Year: 1996
  • Make: pontiac
  • Model: trans am
  • Engine: lt1
  • Transmission: 4L60E

Posted 11 August 2012 - 11:22 AM

Ok ill try running it again. I was burping the coolant system since i replaced radiator, started and shut it off mulitiple times. Will it throw a code if it is misfiring?
0

#4 User is online   GaryDoug 

  • Ramblin' Wreck
  • PipPipPipPipPipPipPip
  • View gallery
  • Group: Full Member
  • Posts: 3,463
  • Joined: 31-May 11
  • Gender:Male
  • First Name:Gary
  • City:Florida West Coast
  • State or Province:FL
  • Country:USA
  • Interests:EE from Ga Tech, but I can't fix your TV, so don't ask ;-)
  • Year: 1998
  • Make: Pontiac
  • Model: Trans Am
  • Engine: 5.7L LS1
  • Transmission: 4L60-E Auto

Posted 11 August 2012 - 11:28 AM

See this document for an explanation of all the trouble codes for your car: http://service.gm.co...6c57P_FY_yE.pdf
1998 Trans Am - Bright Red - all stock and almost all original - one owner - driven daily.
0

#5 User is offline   96lt12011 

  • Pontiac Firebird Oil Changer
  • PipPipPip
  • View gallery
  • Group: Full Member
  • Posts: 137
  • Joined: 15-September 11
  • Gender:Male
  • First Name:chris
  • City:nampa
  • State or Province:ID
  • Country:USA
  • Year: 1996
  • Make: pontiac
  • Model: trans am
  • Engine: lt1
  • Transmission: 4L60E

Posted 11 August 2012 - 11:31 AM

Thank you SO much for that link. I printed it off and gonna wait till tomorrow to where i can get my friends obd II reader. Thanks once again!
0

#6 User is online   GaryDoug 

  • Ramblin' Wreck
  • PipPipPipPipPipPipPip
  • View gallery
  • Group: Full Member
  • Posts: 3,463
  • Joined: 31-May 11
  • Gender:Male
  • First Name:Gary
  • City:Florida West Coast
  • State or Province:FL
  • Country:USA
  • Interests:EE from Ga Tech, but I can't fix your TV, so don't ask ;-)
  • Year: 1998
  • Make: Pontiac
  • Model: Trans Am
  • Engine: 5.7L LS1
  • Transmission: 4L60-E Auto

Posted 11 August 2012 - 11:49 AM

Those readers are great... but somewhat limited. Consider two other possible ways to go:
1. If you use a smart phone, get a $20 Bluetooth OBD2 adapter (http://www.amazon.co...f=pd_sim_auto_2) and download the Torque app ($5), or
2, If you have a laptop PC, get a $15 USB adapter (http://www.amazon.co...f=pd_sim_auto_5) and use a "free" app like OBDWiz or mine (GDScan) and do the same on a much larger screen.
Either way will give you way more information than a simple code reader. For example, you will get misfire counts by cylinder# even when there are not enough to light the MIL. Also graphs, virtual gauges (not on mine), and data logging.
1998 Trans Am - Bright Red - all stock and almost all original - one owner - driven daily.
0

#7 User is offline   96lt12011 

  • Pontiac Firebird Oil Changer
  • PipPipPip
  • View gallery
  • Group: Full Member
  • Posts: 137
  • Joined: 15-September 11
  • Gender:Male
  • First Name:chris
  • City:nampa
  • State or Province:ID
  • Country:USA
  • Year: 1996
  • Make: pontiac
  • Model: trans am
  • Engine: lt1
  • Transmission: 4L60E

Posted 11 August 2012 - 11:52 AM

Nice to know. So if the codes come up as example " cylinder 8 and cylinder 6 misfiring" Would that just simply state that the wires are put on backwards on the optispark?
0

#8 User is online   GaryDoug 

  • Ramblin' Wreck
  • PipPipPipPipPipPipPip
  • View gallery
  • Group: Full Member
  • Posts: 3,463
  • Joined: 31-May 11
  • Gender:Male
  • First Name:Gary
  • City:Florida West Coast
  • State or Province:FL
  • Country:USA
  • Interests:EE from Ga Tech, but I can't fix your TV, so don't ask ;-)
  • Year: 1998
  • Make: Pontiac
  • Model: Trans Am
  • Engine: 5.7L LS1
  • Transmission: 4L60-E Auto

Posted 11 August 2012 - 11:54 AM

View Post96lt12011, on 11 August 2012 - 11:52 AM, said:

Nice to know. So if the codes come up as example " cylinder 8 and cylinder 6 misfiring" Would that just simply state that the wires are put on backwards on the optispark?


That would be a very likely possibility.
1998 Trans Am - Bright Red - all stock and almost all original - one owner - driven daily.
0

#9 User is offline   96lt12011 

  • Pontiac Firebird Oil Changer
  • PipPipPip
  • View gallery
  • Group: Full Member
  • Posts: 137
  • Joined: 15-September 11
  • Gender:Male
  • First Name:chris
  • City:nampa
  • State or Province:ID
  • Country:USA
  • Year: 1996
  • Make: pontiac
  • Model: trans am
  • Engine: lt1
  • Transmission: 4L60E

Posted 11 August 2012 - 11:57 AM

Ok thank's once again for the tips and links. I'll post an update once i figure out the code.
0

#10 User is offline   96lt12011 

  • Pontiac Firebird Oil Changer
  • PipPipPip
  • View gallery
  • Group: Full Member
  • Posts: 137
  • Joined: 15-September 11
  • Gender:Male
  • First Name:chris
  • City:nampa
  • State or Province:ID
  • Country:USA
  • Year: 1996
  • Make: pontiac
  • Model: trans am
  • Engine: lt1
  • Transmission: 4L60E

Posted 12 August 2012 - 09:37 AM

p0300 cool. Anyone know where to start?
0

#11 User is offline   Injuneer 

  • Just Trying to Help
  • View gallery
  • Group: Administrator
  • Posts: 9,863
  • Joined: 22-November 05
  • Gender:Male
  • First Name:Fred
  • City:East Brunswick
  • State or Province:NJ
  • Country:USA
  • Interests:Card carrying member - NHRA and AARP! Licensed Professional Engineer (Mechanical)
  • Year: 1994
  • Make: Pontiac
  • Model: Firebird Formula
  • Engine: 381ci LT1 stroker
  • Transmission: TH400 + O/D

Posted 12 August 2012 - 10:18 AM

"Multiple misfires" doesn't help much. Can you access the misfire count by individual cylinder? That's where you find out if it's truly random, or related to one or more cylinders - e.g. cross-firing plug wires.
1994 FIREBIRD FORMULA

FRED

Posted Image

381ci all-forged stroker - 10.8:1 - CNC LT4 heads/intake - CC solid roller - MoTeC engine management - 8 LS1 coils - 58mm TB - 78# injectors - 300-shot dry nitrous - TH400 - Gear Vendor O/D - Strange 12-bolt - 4.11's - AS&M headers - duals - Corbeau seat - AutoMeter gauges - roll bar - Spohn suspension - QA1 shocks - a few other odds 'n ends. 800HP/800lb-ft at the flywheel, on a 300-shot. 11.5 @ 117MPH straight motor

NO PHOTOS - MY WEBSITE IS BEING MOVED TO ANOTHER SERVER - SORRY FOR ANY INCONVENIENCE
0

#12 User is offline   96lt12011 

  • Pontiac Firebird Oil Changer
  • PipPipPip
  • View gallery
  • Group: Full Member
  • Posts: 137
  • Joined: 15-September 11
  • Gender:Male
  • First Name:chris
  • City:nampa
  • State or Province:ID
  • Country:USA
  • Year: 1996
  • Make: pontiac
  • Model: trans am
  • Engine: lt1
  • Transmission: 4L60E

Posted 12 August 2012 - 10:52 AM

No. The wires were all correct. Can you show me a pic of how you routed the msd 8.5 wires? I have them running through the same "hell hole" as the stock one
0

#13 User is online   GaryDoug 

  • Ramblin' Wreck
  • PipPipPipPipPipPipPip
  • View gallery
  • Group: Full Member
  • Posts: 3,463
  • Joined: 31-May 11
  • Gender:Male
  • First Name:Gary
  • City:Florida West Coast
  • State or Province:FL
  • Country:USA
  • Interests:EE from Ga Tech, but I can't fix your TV, so don't ask ;-)
  • Year: 1998
  • Make: Pontiac
  • Model: Trans Am
  • Engine: 5.7L LS1
  • Transmission: 4L60-E Auto

Posted 12 August 2012 - 11:05 AM

My guess is that one or more wires are DOA, or that one or more terminals aren't pushed in/on all the way. BTW, when I was testing my OBD scanner software, I unplugged one wire to force the cylinder#1 misfire code and the engine idled pretty much normally also.
1998 Trans Am - Bright Red - all stock and almost all original - one owner - driven daily.
0

#14 User is offline   96lt12011 

  • Pontiac Firebird Oil Changer
  • PipPipPip
  • View gallery
  • Group: Full Member
  • Posts: 137
  • Joined: 15-September 11
  • Gender:Male
  • First Name:chris
  • City:nampa
  • State or Province:ID
  • Country:USA
  • Year: 1996
  • Make: pontiac
  • Model: trans am
  • Engine: lt1
  • Transmission: 4L60E

Posted 12 August 2012 - 01:23 PM

Checked all the wires on both sides, and all of them were connected properly. It ran fine, but as the more i drove it the worse the sputtering came back. Next thing i know the CEL light was flashing then stayed on. Could it be the gap on the plugs that can cause the P0300 "multiple misfire" code? What is the correct gap to be set at .50?
0

#15 User is offline   96lt12011 

  • Pontiac Firebird Oil Changer
  • PipPipPip
  • View gallery
  • Group: Full Member
  • Posts: 137
  • Joined: 15-September 11
  • Gender:Male
  • First Name:chris
  • City:nampa
  • State or Province:ID
  • Country:USA
  • Year: 1996
  • Make: pontiac
  • Model: trans am
  • Engine: lt1
  • Transmission: 4L60E

Posted 12 August 2012 - 01:35 PM

View Post96lt12011, on 12 August 2012 - 01:23 PM, said:

Checked all the wires on both sides, and all of them were connected properly. It ran fine, but as the more i drove it the worse the sputtering came back. Next thing i know the CEL light was flashing then stayed on. Could it be the gap on the plugs that can cause the P0300 "multiple misfire" code? What is the correct gap to be set at .50?



I bought the E3 plugs, thinking i would of saved fuel and gas mileage. I think they just don't run right. Looks like i wasted some money.
0

#16 User is online   GaryDoug 

  • Ramblin' Wreck
  • PipPipPipPipPipPipPip
  • View gallery
  • Group: Full Member
  • Posts: 3,463
  • Joined: 31-May 11
  • Gender:Male
  • First Name:Gary
  • City:Florida West Coast
  • State or Province:FL
  • Country:USA
  • Interests:EE from Ga Tech, but I can't fix your TV, so don't ask ;-)
  • Year: 1998
  • Make: Pontiac
  • Model: Trans Am
  • Engine: 5.7L LS1
  • Transmission: 4L60-E Auto

Posted 12 August 2012 - 01:48 PM

Which ones did you buy? I see the standard replacement is the E3.44. With E3.40 and E3.62 as optionals.
1998 Trans Am - Bright Red - all stock and almost all original - one owner - driven daily.
0

#17 User is offline   96lt12011 

  • Pontiac Firebird Oil Changer
  • PipPipPip
  • View gallery
  • Group: Full Member
  • Posts: 137
  • Joined: 15-September 11
  • Gender:Male
  • First Name:chris
  • City:nampa
  • State or Province:ID
  • Country:USA
  • Year: 1996
  • Make: pontiac
  • Model: trans am
  • Engine: lt1
  • Transmission: 4L60E

Posted 12 August 2012 - 01:59 PM

I can't remember, plus i threw away the boxes. :angrysoapbox:
0

#18 User is offline   96TA 

  • just another car guy
  • View gallery
  • Group: FBNCC Member
  • Posts: 1,705
  • Joined: 25-April 09
  • Gender:Male
  • First Name:Albert
  • City:Port Saint Lucie
  • State or Province:FL
  • Country:USA
  • Interests:family, cars, racing
  • Year: 1996
  • Make: Pontiac
  • Model: Trans-Am
  • Engine: LT1
  • Transmission: 6 Speed

Posted 12 August 2012 - 02:14 PM

Not sure if it applies on the older cars like ours but its worth a shot, disconnect the battery and while the battery is disconnected clean the throttle body and blade then reconnect the battery and let it idle with the a/c off for a few minutes. A lot of newer vehicles require this as part of the spark plug replacement.
Albert
Treasure Coast, FL
Remember there is always someone who needs the parts you send to the junkyard
Membership is what helps sites like ours succeed, SIGN UP TODAY!!
Membership Details can be found here: http://www.firebirdnation.com/club/


Posted Image
96 TRANS AM - SLP ceramic coated shorty headers, Flowmaster exhaust, SLP intake going in the bumper under the driverside light, Short throw shifter, Honeycomb tailights, Corvette styled 5 spoke rims with 315/35/17 Sumitomo rears 245/45/17 Fuzion HTI front tires, Drilled and slotted rotors front and rear, Accel optispark, Skip-shift eliminator, more to come...

1975 Trans Am SOLD -& MISSED -- THE 75 MOD LIST - C.E. SUBFRAME CONNECTORS, EIBACH LOWERING SPRINGS FRONT, 3 WAY ADJUSTABLE SHOCKS ALL AROUND, ENERGY SUSPENSION FROM FRONT TO BACK, FLOWMASTER SUPPER 44 x2, LONG TUBE HEADERS, JEGS 3" EXHAUST PIPES, RUSSLES BRAIDED BRAKE HOSES FRONT AND BACK, TCI STREET FIGHTER 400 TRANNY WITH 2200 STALL CONVERTER, NEW WIRING, AND MORE TO COME

THE 95 TRANS AM SOLD BUT NOT FORGOTTEN
0

#19 User is offline   96lt12011 

  • Pontiac Firebird Oil Changer
  • PipPipPip
  • View gallery
  • Group: Full Member
  • Posts: 137
  • Joined: 15-September 11
  • Gender:Male
  • First Name:chris
  • City:nampa
  • State or Province:ID
  • Country:USA
  • Year: 1996
  • Make: pontiac
  • Model: trans am
  • Engine: lt1
  • Transmission: 4L60E

Posted 12 August 2012 - 02:21 PM

I've tried that. Im thinking it could be the gap, but then again the E3 plugs you cannot gap. Everything ran fine before i changed out the plugs and wires. I never had any codes or problems with the EGR valve or any vacuum leaks.
0

#20 User is offline   96TA 

  • just another car guy
  • View gallery
  • Group: FBNCC Member
  • Posts: 1,705
  • Joined: 25-April 09
  • Gender:Male
  • First Name:Albert
  • City:Port Saint Lucie
  • State or Province:FL
  • Country:USA
  • Interests:family, cars, racing
  • Year: 1996
  • Make: Pontiac
  • Model: Trans-Am
  • Engine: LT1
  • Transmission: 6 Speed

Posted 12 August 2012 - 02:29 PM

When I changed the plugs and wires on mine I spun the wire the wrong way and burned it on the header and had a p300 code for the #4 and #8, changed those wires and all fine. But the saving grace was the misfire count feature. On a older bird I had the MSD 8.5mm wires and they worked pretty bad, ran a 8mm set from Autozone and it ran perfect. The other thing to check is if the coil wire is all the way on and if the coil is working properly. I just had to change mine last week for the same issue you are having. $60.00 at Bennett for the AC Delco unit with a 1 year warranty.
Albert
Treasure Coast, FL
Remember there is always someone who needs the parts you send to the junkyard
Membership is what helps sites like ours succeed, SIGN UP TODAY!!
Membership Details can be found here: http://www.firebirdnation.com/club/


Posted Image
96 TRANS AM - SLP ceramic coated shorty headers, Flowmaster exhaust, SLP intake going in the bumper under the driverside light, Short throw shifter, Honeycomb tailights, Corvette styled 5 spoke rims with 315/35/17 Sumitomo rears 245/45/17 Fuzion HTI front tires, Drilled and slotted rotors front and rear, Accel optispark, Skip-shift eliminator, more to come...

1975 Trans Am SOLD -& MISSED -- THE 75 MOD LIST - C.E. SUBFRAME CONNECTORS, EIBACH LOWERING SPRINGS FRONT, 3 WAY ADJUSTABLE SHOCKS ALL AROUND, ENERGY SUSPENSION FROM FRONT TO BACK, FLOWMASTER SUPPER 44 x2, LONG TUBE HEADERS, JEGS 3" EXHAUST PIPES, RUSSLES BRAIDED BRAKE HOSES FRONT AND BACK, TCI STREET FIGHTER 400 TRANNY WITH 2200 STALL CONVERTER, NEW WIRING, AND MORE TO COME

THE 95 TRANS AM SOLD BUT NOT FORGOTTEN
0

Share this topic:


  • 2 Pages +
  • 1
  • 2
  • You cannot start a new topic
  • You cannot reply to this topic

1 User(s) are reading this topic
0 members, 1 guests, 0 anonymous users