11 replies to this topic

[SySTeMaT1c]

i tryed to start my car today, turned over 3 times, then made a huge THUMP!!! noise, and it felt like my car crashed, and i thought to myself, "that dint sound and feel to good", then i noticed after, battery was dead, jumped it, charged it a bit, and now my car is sticking at 2000 and 3000 rpms, and it wont acc. at all, idk if this helps, but i just put a CAI in my car bout a week ago, any help is greaty greatly appreciated, thank you very much.

[SySTeMaT1c]

figured out the problem with my car, the cats plugged,

[FBN Firebird Nation]

Bummer, but at least you figured out the problem. I don't know how I missed this thread. Thanks for the update.

Is there a check that you can do to see if your cat is plugged?
sometimes my car does the same but if i give her a lil jump they will go higher than 3000

[SySTeMaT1c]

Is there a check that you can do to see if your cat is plugged?
sometimes my car does the same but if i give her a lil jump they will go higher than 3000

yea, use a backpressure guage, my engine is actully building up pounds of pressure cause the cat is clogged, lol, my car is not driveable until i get it fixed..

man that sucks best of luck to ya

[SySTeMaT1c]

hey thanks, well, i did manage to get all my spark plugs replaced!

haha i feel your pain i did my sparkplugs and wires, plugs are terrible
the first time but once you do it once its easy from there, wires are cake

oh and i was looking at this back pressure guage and it reads 0-8 psi, whats average psi?
and it says that it plugs into an o2 sensor hole (or whatever the technical term for hole is)
which 02 sensor do i use? the one before or after the cat? or both? help please

[FBN Firebird Nation]

oh and i was looking at this back pressure guage and it reads 0-8 psi, whats average psi?
and it says that it plugs into an o2 sensor hole (or whatever the technical term for hole is)
which 02 sensor do i use? the one before or after the cat? or both? help please

I am not sure of the pressure, but you definitely want to use the 02 sensor before the cat.

[SySTeMaT1c]

oh and i was looking at this back pressure guage and it reads 0-8 psi, whats average psi?
and it says that it plugs into an o2 sensor hole (or whatever the technical term for hole is)
which 02 sensor do i use? the one before or after the cat? or both? help please

it should not exceed 1.25 psi at 2500 rpms (correct me if im wrong), and like bob said, use the front one, if you think about it, using the back one makes no sense at all, the psi in my car is 8.1 psi at 2500 rpms, thats really bad, and my pcm says my cats junk too, but if you have a high psi of backpressure, dont assume its a bad cat right away, it could possibly be a collapsed pipe or your muffler, and look into a backpressure gauge that reads 8-10 psi, so you know what your looking at. also, im pretty sure misfires are what caused my cat to get clogged. because my car misfires in the rain. i need to get the wires replaced...

Edited by SySTeMaT1c, 26 July 2009 - 07:28 PM.

very interesting cause my car was misfriring for a bit as well