i got a 97 civic with an h22a it has dc headers full skunk 2 exhaust magna flow high flow resonator and cat got the skunk 2 intake manifold and throttle body also have msd plugs and external coil with this setup im misfiring

so this is what happens

when im at idle its ok
when im driving its ok
but when im driving and let off the gas while still in gear it will pop (misfire)
from the exhaust my rear bumper is always black from running to rich im guessing

i installed a fuel pressure guage and when the car is at idle im reading about 36 psi
i have also installed a new o2 sensor about a month ago

when accelerating its about 42 i think

if anyone knows what this could be please let me know im tired of it always misfiring when i let off the gas

 

Go back to a stock ignition system.

Do a tune up and set the ignition timing to spec using a timing gun.

Any CEL codes?

 

No there is no cld I think its because its obd 1 and the check engine light is off

 

Does the CEL work?

 

Im not sure any idea how to go back to a stock igition how to remove the coil I.boight the car like that

 

Aftermarket external coils are generally problematic in our Civics.

Return to a complete OEM distributor like this one:

 

Could I jsu swap my dizzy? Instead of messin with all the wireing? Or should I just swap my msd coil?

 

Bump

 

Bump

 

Swap the distributor and call it a day /end

 

what about the extra wiring that i have running from the external coil right not just get rid of it all?

 

use a helms manual and return the entire ignition system back to stock. get rid of anything that is not in the helms manual.

 

ok thank you do you think that the coil that im running is any good? will there be a big difference if i go back to stock ignition?

 

no stock ignitions are good to like 500 hp

 

i am having a simular problem, accept its in a prelude.