Spark Plugs very black and crusty
Thread Starter
Supreme Member
Joined: Jul 1999
Posts: 1,566
Likes: 0
From: Toronto, Ont
Spark Plugs very black and crusty
Hi all, I changed my spark plugs this weekend and noticed that they are very black and a crust like substance has mated to them. I get a dark...soot-like residue coming from my tail-pipes. How can I make my car run less rich!!!!
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89 GTA
305 TPI
WC 5spd w/3.45 rear
Accel Cap & 8mm Taylor's
MSD6A Ignition
Accel Supercoil
Custom Cold Air Induction
Jet Airfoil
K&N Airfilter
160 deg stat/fan switch
Hypertech Thermomaster Chip
Steel Rad
Cat back 3" Exhaust
HiGh FlOw Dynomax Cat
------------------
89 GTA
305 TPI
WC 5spd w/3.45 rear
Accel Cap & 8mm Taylor's
MSD6A Ignition
Accel Supercoil
Custom Cold Air Induction
Jet Airfoil
K&N Airfilter
160 deg stat/fan switch
Hypertech Thermomaster Chip
Steel Rad
Cat back 3" Exhaust
HiGh FlOw Dynomax Cat
Moderator
Joined: Jan 2000
Posts: 20,981
Likes: 11
From: Mercedes Norte, Heredia, Costa Rica
Car: 1984 Z28 Hardtop
Engine: 383 Carb
Transmission: 4L60
Axle/Gears: 3.54 Dana 44
Maybe check the O2 sensor too? I'm surprised that you wouldn't be getting a code if it was running that rich.
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1984 Silver Z28, 383 cid 4 bolt, ARP Fasteners, 2 1/2" Cowl Induction Hood, 600 cfm Performer Carburetor, Torker II Intake, Performer RPM Heads, XE268H Cam, Magnum Roller Tip Rockers, MSD6AL Ignition, Blaster2 Coil, Recurved HEI Distributor, 700R4, TransGo SK, 2.73:1 Limited Slip Dana 44, Terminator Headers, Custom 3" TIG Welded Stainless Exhaust, Flo-Pro Twister Muffler, 4 Wheel Disc Brakes, Oil Cooler
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1984 Silver Z28, 383 cid 4 bolt, ARP Fasteners, 2 1/2" Cowl Induction Hood, 600 cfm Performer Carburetor, Torker II Intake, Performer RPM Heads, XE268H Cam, Magnum Roller Tip Rockers, MSD6AL Ignition, Blaster2 Coil, Recurved HEI Distributor, 700R4, TransGo SK, 2.73:1 Limited Slip Dana 44, Terminator Headers, Custom 3" TIG Welded Stainless Exhaust, Flo-Pro Twister Muffler, 4 Wheel Disc Brakes, Oil Cooler
Supreme Member
Joined: Jul 2000
Posts: 1,787
Likes: 20
From: Tomball, TX
Car: 89 TTA
Engine: Turbo 3.8
Transmission: 200R4
My car (91' bird LO3) seems to be running very rich too. It blows soom kind of liquid/solid? (haven't really figured it out) out of the tailpipe and it stains rocks and cement. I just changed the rotor because it was very, very bad. I'm gonna try plugs and cap next. The wires seem to be fine but if they turn out bad what should I replace them with? My car is at a shop right now. If the mechanic gives me any solution or leads I'll post them here. Good luck.
Thread Starter
Supreme Member
Joined: Jul 1999
Posts: 1,566
Likes: 0
From: Toronto, Ont
Accell cap and rotor 25000km's old
Taylor 8mm wires 25000km's old
sparkplugs are of the same age
car boggles a bit while accelerating slowly in neutral from idle to 2000..feels very strong though...
Maybe I should pull the cap off and see what's going on under there...
Thanks
------------------
89 GTA
305 TPI
WC 5spd w/3.45 rear
Accel Cap & 8mm Taylor's
MSD6A Ignition
Accel Supercoil
Custom Cold Air Induction
Jet Airfoil
K&N Airfilter
160 deg stat/fan switch
Hypertech Thermomaster Chip
Steel Rad
Cat back 3" Exhaust
HiGh FlOw Dynomax Cat
Taylor 8mm wires 25000km's old
sparkplugs are of the same age
car boggles a bit while accelerating slowly in neutral from idle to 2000..feels very strong though...
Maybe I should pull the cap off and see what's going on under there...
Thanks
------------------
89 GTA
305 TPI
WC 5spd w/3.45 rear
Accel Cap & 8mm Taylor's
MSD6A Ignition
Accel Supercoil
Custom Cold Air Induction
Jet Airfoil
K&N Airfilter
160 deg stat/fan switch
Hypertech Thermomaster Chip
Steel Rad
Cat back 3" Exhaust
HiGh FlOw Dynomax Cat
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