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 need help car misfiring

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zerg1024
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Joined : 2007-09-06
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need help car misfiring Empty
PostSubject: need help car misfiring   need help car misfiring EmptyFri Jun 27, 2008 6:59 pm

ok so i changed the plugs and wires since the car was misfiring and it still does it i dont know what else it could be. can someone help me out here?
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Mr.Riviera
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Mr.Riviera


Name : Matthew
Age : 37
Location : Florida
Joined : 2007-01-17
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need help car misfiring Empty
PostSubject: Re: need help car misfiring   need help car misfiring EmptyFri Jun 27, 2008 7:27 pm

have you cleaned the MAF? how old are the wires? what plugs did you use? what year riv are you working on? engine? (those should be in your signature!) does it only miss under load, or all the time?

_________________
1996 with 254k miles, L32 4" FWI -> ported N* -> Ported Gen V w/3.0" Pulley, Stage 3 Phenolic I/C, ZZP FMHE, 1.84 RR, Headers and 3" pipe to mufflers, F-body brakes, and lowered on Eibachs. -RIP
AMG C400 White on black. Stage 2 w/E30 - 11.9@117 -daily
need help car misfiring Dsc_0110
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zerg1024
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PostSubject: Re: need help car misfiring   need help car misfiring EmptyFri Jun 27, 2008 7:38 pm

its a 95 non sc. the wires are two days old and i used ngk spark plugs and yes i cleaned the maf. it only does it under load.
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zerg1024
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PostSubject: Re: need help car misfiring   need help car misfiring EmptySat Jun 28, 2008 6:59 pm

guess no one can help me out huh?
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Mr.Riviera
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Mr.Riviera


Name : Matthew
Age : 37
Location : Florida
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Post Count : 4394
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need help car misfiring Empty
PostSubject: Re: need help car misfiring   need help car misfiring EmptySat Jun 28, 2008 7:09 pm

have you had any SES lights pop up? sorry, but if it's not plugs,wires, or maf, 'm out of suggestions off hand. all i can say is get any codes read if they show up, and do any regular maint items to start ruling things out. (like fuel filter, pcv, air filter, oil change, etc to see if things improve any)

_________________
1996 with 254k miles, L32 4" FWI -> ported N* -> Ported Gen V w/3.0" Pulley, Stage 3 Phenolic I/C, ZZP FMHE, 1.84 RR, Headers and 3" pipe to mufflers, F-body brakes, and lowered on Eibachs. -RIP
AMG C400 White on black. Stage 2 w/E30 - 11.9@117 -daily
need help car misfiring Dsc_0110
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Mr.Riviera
Expert
Mr.Riviera


Name : Matthew
Age : 37
Location : Florida
Joined : 2007-01-17
Post Count : 4394
Merit : 101

need help car misfiring Empty
PostSubject: Re: need help car misfiring   need help car misfiring EmptySat Jun 28, 2008 10:12 pm

could also be a problem with one of your coil packs. try cleaning the plate underneath them.

_________________
1996 with 254k miles, L32 4" FWI -> ported N* -> Ported Gen V w/3.0" Pulley, Stage 3 Phenolic I/C, ZZP FMHE, 1.84 RR, Headers and 3" pipe to mufflers, F-body brakes, and lowered on Eibachs. -RIP
AMG C400 White on black. Stage 2 w/E30 - 11.9@117 -daily
need help car misfiring Dsc_0110
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zerg1024
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need help car misfiring Empty
PostSubject: Re: need help car misfiring   need help car misfiring EmptySat Jun 28, 2008 11:02 pm

yea the check engine light is on i am going to have to pull the codes. we did the oil change and the air filter is new too. could it be because i am missing the wiring harness for the back knock sensor?
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AA
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Name : Aaron
Age : 46
Location : C-bus, Ohio
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PostSubject: Re: need help car misfiring   need help car misfiring EmptySun Jun 29, 2008 5:46 pm

Is the car knocking or misfiring, or both? Need to know those codes.

_________________
'05 GTO 6.0L • 6-spd • 95k miles • 0-60: 4.8s • 16.9 avg MPG • Nelson Ledges Lap: 1:26

'95 Celica GT 2.2L • 5-spd • 165k miles • 0-60: yes

'98 SC Riviera • 281k miles • 298 HP/370 TQ • 0-60: 5.79s • ET: 13.97 @ 99.28 • 4087 lb • 20.1 avg MPG • Nelson Ledges Lap: 1:30
3.4" pulley • AL104 plugs • 180º t-stat • FWI w/K&N • 1.9:1 rockers • OR pushrods • LS6 valve springs • SLP headers • ZZP fuel rails
KYB GR2 struts • MaxAir shocks • Addco sway bars • UMI bushings • GM STB • Enkei 18" EV5s w/ Dunlop DZ101s • F-body calipers
EBC bluestuff/Hawk HP plus • SS lines • Brembo slotted discs • DHP tuned • Aeroforce • Hidden Hitch

^^^ SOLD ^^^ frown

'70 Ninety-Eight Holiday Coupe 455cid • 116k miles
^^^ SOLD ^^^ frown
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http://www.cardomain.com/ride/657082/4
zerg1024
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PostSubject: Re: need help car misfiring   need help car misfiring EmptyMon Jun 30, 2008 2:33 pm

it is just misfiring. is there a way to get the codes off without a scan tool?
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AA
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Name : Aaron
Age : 46
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PostSubject: Re: need help car misfiring   need help car misfiring EmptyMon Jun 30, 2008 6:52 pm

You need a scan tool. Some local auto parts stores will read them for you at no charge.

_________________
'05 GTO 6.0L • 6-spd • 95k miles • 0-60: 4.8s • 16.9 avg MPG • Nelson Ledges Lap: 1:26

'95 Celica GT 2.2L • 5-spd • 165k miles • 0-60: yes

'98 SC Riviera • 281k miles • 298 HP/370 TQ • 0-60: 5.79s • ET: 13.97 @ 99.28 • 4087 lb • 20.1 avg MPG • Nelson Ledges Lap: 1:30
3.4" pulley • AL104 plugs • 180º t-stat • FWI w/K&N • 1.9:1 rockers • OR pushrods • LS6 valve springs • SLP headers • ZZP fuel rails
KYB GR2 struts • MaxAir shocks • Addco sway bars • UMI bushings • GM STB • Enkei 18" EV5s w/ Dunlop DZ101s • F-body calipers
EBC bluestuff/Hawk HP plus • SS lines • Brembo slotted discs • DHP tuned • Aeroforce • Hidden Hitch

^^^ SOLD ^^^ frown

'70 Ninety-Eight Holiday Coupe 455cid • 116k miles
^^^ SOLD ^^^ frown
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http://www.cardomain.com/ride/657082/4
'96reese
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Name : Reese
Age : 41
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PostSubject: Re: need help car misfiring   need help car misfiring EmptyTue Jul 01, 2008 2:23 am

you will have to take it to a shop to scanned. i dont think part stores will have an obd 1 scan tool to scan your 95. where are you located it? if your close to Stl, mo then i'll scan it for you.
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BillBoost37
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Location : Enfield CT
Joined : 2007-11-28
Post Count : 769
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need help car misfiring Empty
PostSubject: Re: need help car misfiring   need help car misfiring EmptyTue Jul 01, 2008 6:32 am

Some parts stores can scan 95's. But it's not as common as OBD2 vehicles.

One way to tell which cylinder is misfiring would be to remove one wire at a time and see which cylinder gives you no difference versus what you have now.

That's the old moldy way w/o a scan tool. Also ensure your wires aren't touching the O2 wiring.
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