mcfly4001

well guys, here are the symtoms,

car stumbles and sputters around 2500 rpms, check engine light blinks on, and goes off, and backfires a little, about 50% of the time when i push the gas while driving, it gets better as the i drive the car more, and the problem is not as bad if i unhook the airpump, and if i keep contant pressure on the gas, the car revs fine.

if the car is cold, it will start right up, if i have been driving it, and cut it off for a few mins, the car takes about 5 times to crank, with the occational light backfire.

anybody?

i have new plugs, and wires, coils checked out good, and i have a new fuel filter,

leaky injectors?

clogged injectors?

clogged main cat?

TPS out of wack?

anybody?

thanks

BoOsTin FD

it could be your air pump or clogged main cat. If the air pump was bad for some time, then it probably clogged up the main cat.

mcfly4001

my air pump makes a growling sound, hmm, how many psi should that baby put out? anyone else?

thanks

paul

Street King

Don't know the psi but if it makes a growling sound, teh bearings are going oout inside, you need to pick up another used one. They go for cheap, or take it off all together if you don't have the main cat anymore.

mcfly4001

i do have a main cat, would i need one with a high flow cat? do yall thing this is my problem yall?

thanks

BoOsTin FD

it could be your problem. I think even with the hi-flo it would be better to keep an air pump if there is a pipe on the hi-flo to hook it up to. That way it won't clogg up in couple of months.

YayeR

I have a used air pump for sale with under >30k miles on it. It comes with hoses and the bracket if you need. give me an offer in pm or email at monkeysbear@hotmail.com

YayeR

check the tps and everything you took off to change the plugs (if you did it from the bottom it shouldn't have caused any problems) and anything else you might have taken off before. also, be careful when looking for the issue, you can get distracted by the main problem and do something else wrong, this is a very common mistake and it's why a lot of people's cars seem to stay fucked up once something goes wrong.

jpandes

You do need an air pump with a HF Cat. I have an N-tech HF cat. I ran it for a month w/o the air pump connected. The car idles for **** and smelled really bad. Once I had then air pump tube welded to the cat, things ran pefectly.

mcfly4001

thanks everyone, im going to check out my main cat tomorrow, and try to determine if it is clogged, and what do yall think is a good price to purchase a used airpump at?

thanks again

Street King

There's tons of them cause most people do wiht out it and a main cat. I wouldn't pay more than 50 bucks for one. I have a used one right now for 40 bucks shipped with around low 50k miles on it.

mcfly4001

im still in search of my problem, i put a new o2 sensor on yesterday, and the other one was pretty bad, so maybe i will quit running so rich, but by now i think i have fouled my new plugs already, so i will have to get more i guess.

i also tried to dertermine if my main cat was clogged. i took it off, and went to a dark room, and put a flashlight down in on end, and could not see any light out the other end, not good i thought, but i was still not satisfied. so i got my air compressor, and hooked up my blowing tool, and rigged up a gasket, (from cardboard, and ducktape), and placed the blowing tool in one end of the main cat, sealed it off, here are the results:

at 40 psi, about enough air came out the other side to blow a feather.

at 80 psi, about the same result.

at 100 psi, might blow a big turkey feather.

lots of sut in there too, i dont know a lot about these main cats, but it seems like there should be more air flow than that, what do u yall think?