Rep Power: 0

so this has been going on for over a year now . got the car and drove it home knowing the manifold was bad , its the one with the cat in the manifold . so halfway home it bogs out and the manifold is blood red . left it there for an hour and when i came back i ran for about 30 minutes then did the same . i replaced the manifold with headers , no cat . same issue . replaced the camshaft position sensor , same issue , got a mechanic to check the codes and i cant remember the code exacly but he said it was my top o2 sensor , which is the air\fuel ratio i beleive . so anyway i ordered that . still the same thing with the new sensor . so i parked it for a few months now im just sick of it and want to get it running . started it up the other day went for a drive and this time when it happend i had my father check the muffler to see if it was clogged at all and it was spitting out metal flakes . i assumed it was peices of the old cat stuck somewhere so yesterday i cut the muffler off . same issue again , today i cut the resonator off and its completly clear . Iv had this to 3 shops so far and everything i said i replaced i was told was my issue . sorry for the long post but i wanted to get as much info across as possible . anyone have an idea ? or maybe point me towards something else to check ? anything would be greatly appreciated . also forgot to mention check engine light shut off after i replaced the o2 sensor but came back on after it messed up , was purchased from napa

 
Rep Power: 367

vacuum leak in the intake manifold? That would throw more air than expected into engine

 
Rep Power: 222

What brands were the sensors?
checked engine timing?

 
Rep Power: 0

i cant remember for sure about the other sensors , most of my parts come from carquest most likly ac delco . but the o2 sensor i got recently was NGK or NTK whatever it is because i had to go to napa for it . one thing i noticed tho is on the car originally the top o2 had a blue wire and the bottom o2 wire was black , the picture on napa of the new one i ordered was blue , but they gave me the black one . i didnt even realize untill today maybe i have the wrong sensor in the top ? as foor the timing i havent checked myself but it supposedly had timing work done before i bought it . i asked a mechanic to check that one of the times i took it in he said the timing wasnt off or anything .

 
Rep Power: 222

As in the harness plug/wire cover is black instead of blue? That's normal. As long as you have a Denso/ntk a/f sensor that should be correct. The other sensor needs to be OE as well.

 
Rep Power: 0

yes thats what i meant colin its just the sleeve . i got it all back together today , got rid of the intake box , put on my cold air intake , cut off the resonator and muffler and installed new ones because someone said peices of the old cat could be stuck inside . also put in fuel with fuel injector cleaner , cleaned my maf sensor , checked my fuel pump . so once i got in to go for a test drive it worked for another 30 minutes and died completly . it wont run untless i rev and it struggles to even get the rpm up while backfiring . trying to get someone to check it for codes again now i had to leave the car up the road . it should start up after a while as usual . i guess ill check for vaccume leaks once i get it home . im honestly stumped . has any one had similar issues like this ? runs amazing for 30 minutes then just losses all hp and stalls , but starts right back up and runs perfect again for another 30 minutes ?? no one seems to be able to figure this out

 
Rep Power: 0

update on the situation . got my 90 degree o2 spacers today . car is still sputtering to stop after it warms up . and theres no vaccum leak , so im at a loss here i guess its time to find another car

 
Rep Power: 222

O2 sensor spacers only work on the downstream sensor to get rid of p0420. That's all they do.
you need to do more/better diagnosis, or take it to a shop that knows Hondas and pay them