To start, my wife blew the engine in this car originally and had a used engine with about 30,000 miles put in (currently about 40,000 now) in the beginning every thing worked perfect until about 6 months later the catalytic converter messed up and is now creating alot of what I think is "back pressure" and is now idoling lower and slower take off before warm up. Since around that same time my power in the entire car (headlights, radio, interior lights, etc.) Seems to be horrible when it idols low but presist even when driving but not as bad. For referrence, my radio gets choppy like loss of power or watts at volume level 25 during idol or braking, but when driving at hwy speed my radio will let me turn it up to about volume level 35 before getting choppy and cutting out (like the more watts needed to play the radio the worse it does, and during braking lights go kind of dim and brighten when I press the gas). Also vehicle is worse when sitting in sun on a hot day? Odd? But I cannot for the life of me pin point it! Would like to fix myself before taking into shop if possible I am very handy with cars and wiring just not understanding problem fully enough to pinpoint cause. Alt and batt have been tested and are fine and of course all fuses in place. ANY INFO WOULD BE GREATLY APPRECIATED! Thank you in advance
Start with the cat converter. I would get the motor running correctly. It will make some difference with the charging system.
Start there before proceeding
August, 13, 2012 AT 3:00 AM
Now I dont have any emissions standards in my area. So would it be ok to punch out the cat or should I spend the extra cash to buy a new one? At work right now so I cant look but if I recall I think the cat is on the manifold so do I need to get a whole new manifold?
August, 13, 2012 AT 10:05 AM
Get a new one. No, it is bolted to the manifold
August, 13, 2012 AT 12:16 PM
If the idling speed is too low, it can affect the charging. I would recommend cleaning the throttle body and IAC to stabilise the idling speed and see if the problem goes away.