I think my car is backfiring or altleast making a popping noise when i accelerate from about 3-5mph abrubtly, doesnt happen often though but when it does it pisses me off. any help or suggestions will be appreciated (((((also i have already Searched)))))
i have a hiflow cat and muffler

 

is it back firing or just sputtering. If its backfiring More than likly its sounds to me like a weak valve spring thats not closing correctly or timing. Its possible that your distributor(or other componets associated with it ie. cap, rotor button, or igniter) is messed up so that the spark is hitting the chamber at the wrong time causing detonation. If its just sputtering it could be a bad sparkplug/sparkplug wire or same as stated above..

 

BOOM!

Just tell people that's your VTEC crossover point.

 

what have you done recently to your motor?

is the firing order right? ignition timing set right? etc...

 

i think it started when i added the hiflow cat

 

lol, is it a fart-can muffler? if so when you're going really slow you are just hearing the pressure build up and popping

 

lol, its like 3_1/2 inches

 

is this the same ebay "high flow cat" that you installed and left the o2 sensor dangling since the "cat" didnt have a bung for it?

still no CEL? you should check the CEL anyways and see if theres any code stored.

 

eheheh. I was going to get a Megan "Racing" "high flow cat" because when I put on my GReddy Evo2 it blew out the cat. If the test pipe would've had an O2 bung, I would've used it.

Too bad us Accord owners don't have Casper's O2 Simulator like they have on the *SX