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Topic: smoking and backfiring after tune up (83 Cat) (Read 2276 times) previous topic - next topic

smoking and backfiring after tune up (83 Cat)

as it says, I changed plugs and wires cap and rotor....  and now it backfires, sputters and smokes and the cat. convertor is rattlin a bit


Any ideas?

Rev up it backfires and smokes..


I used the same Firing order as my SO bird

smoking and backfiring after tune up (83 Cat)

Reply #1 –
sounds like timing or ignition related then if it just showed up. Or it misses its master.
RIP 1988 and 1990 Lincoln Mark VII LSC
I welcomed the dark side and currently am driving a 2000 Dodge Durango SLT plus, with a 5.9, Code named project "Night Runner"
Shes black on black, fully loaded, with headers, 180 tstat, e fan, straight exhaust into a cherry bomb vortex ler, full tune up, ported intake and T/B, MSD coil, and round aircleaner.
Mods to come: Fully rebuilt and heavily modded 46RE, and a richmond rachet locker.
my $300 beater ;)
R.I.P Kayleigh Raposa 12/18/90 - 2/24/07

smoking and backfiring after tune up (83 Cat)

Reply #2 –
Best suggestion is to do it again.  Start at the button and work to the plugs.  It has to be somewhere in the stuff you changed.
84 TC 302 -5.0L/t5/7.5 locking rear and a 3.45 gear, Edelbrock Intake, Aluminum Heads, Edlebrock 65mm Throttlebody, Edlebrock Cam, 24lb injectors & MAS Air Sensor calibrated via chip,  BBK headers, Catback H pipe, Magnaflow lers :evilgrin:
:pics-stfu:

 Project Thread with pics

smoking and backfiring after tune up (83 Cat)

Reply #3 –
checked it again and its in the right order.

cats? the floor is gettin hella hot.

smoking and backfiring after tune up (83 Cat)

Reply #4 –
Why would it do it all of a sudden though?
Might be them clogged though? are they glowing?
RIP 1988 and 1990 Lincoln Mark VII LSC
I welcomed the dark side and currently am driving a 2000 Dodge Durango SLT plus, with a 5.9, Code named project "Night Runner"
Shes black on black, fully loaded, with headers, 180 tstat, e fan, straight exhaust into a cherry bomb vortex ler, full tune up, ported intake and T/B, MSD coil, and round aircleaner.
Mods to come: Fully rebuilt and heavily modded 46RE, and a richmond rachet locker.
my $300 beater ;)
R.I.P Kayleigh Raposa 12/18/90 - 2/24/07

smoking and backfiring after tune up (83 Cat)

Reply #5 –
floor got way hot. the pop im gettin is from the exhaust system

prolly the cats... Claude keeps tellin meh that a free-er flowing exhaust would help it alot.

smoking and backfiring after tune up (83 Cat)

Reply #6 –
So whats stoppin ya? Stang shorties, summit H, catback of your choice?

smoking and backfiring after tune up (83 Cat)

Reply #7 –
sounds like you went clockwise in your wiring insted of  counterclockwise
[SIGPIC][/SIGPIC]
1974 maverick lsx powered turbo car SOLD
1973 maverick Tijuana Taxi Tribute
1957 chevy LSX Turbo project (race car)
Owner of Joe Dirt Fabrication

smoking and backfiring after tune up (83 Cat)

Reply #8 –
im pretty sure 5.0's plug wires are routed counter-clockwise, not clockwise.
1979 Ford Fairmont
[/B]
5.0L/4R70W/8.8"/5-lug/3" Exhuast

smoking and backfiring after tune up (83 Cat)

Reply #9 –
say huh? doesnt it spin CCW?

smoking and backfiring after tune up (83 Cat)

Reply #10 –
Quote from: 87thunderbirdBlackJack;178675
say huh? doesnt it spin CCW?


yeah i made a typo been a long day at work

but sounds like it is crosswired to me
[SIGPIC][/SIGPIC]
1974 maverick lsx powered turbo car SOLD
1973 maverick Tijuana Taxi Tribute
1957 chevy LSX Turbo project (race car)
Owner of Joe Dirt Fabrication

smoking and backfiring after tune up (83 Cat)

Reply #11 –
Quote from: 87thunderbirdBlackJack;178675
say huh? doesnt it spin CCW?


yes, for v8's and 3.8l's.
1979 Ford Fairmont
[/B]
5.0L/4R70W/8.8"/5-lug/3" Exhuast

smoking and backfiring after tune up (83 Cat)

Reply #13 –
i got that its the same order as a SO 5.0its wired right.


my problem is it feels like the car cant breathe maybe a clogged cat. bad o2?


when im going normal speed it chugs and acts all retarded, then i tromp on it and it hesitates then boom it goes.

smoking and backfiring after tune up (83 Cat)

Reply #14 –
Does this car have a thermactor system?
-- 05 Mustang GT-Whipplecharged !!
--87 5.0 Trick Flow Heads & Intake - Custom Cam - Many other goodies...3100Lbs...Low12's!