failed emissisions horribly, have an idea..
02-25-05, 01:35 AM
#27
finally back in an RX-7!!
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Originally Posted by steve84GS TII
Not really.The cat itself might bolt up,but Im guessing the later 13B cats are bigger.
Simply bolting another exhaust system up isnt going to solve the problem,unless it is by chance just a bad cat.You have to determine what part has failed before changing anything.If the cat is good but the ACV or some other valve is bad,youll still fail just as quick as if you had a bad cat.A good cat cannot work without proper,metered air injection.
And on a side note,unless you just do it temporarily to get by the test,running a smog pump directly into the exhuast full time will fry the cat and could potentially torch the car.The ACV and rats nest meters the air injection so that it only injects air when needed.Too much air or air all the time will overheat the cat and cause it to melt down.Thats what the overheat sensors are for,to shut down the air injection if things get too cookin'.If its just for a few minutes to get by a smog test,then you should be OK.
Simply bolting another exhaust system up isnt going to solve the problem,unless it is by chance just a bad cat.You have to determine what part has failed before changing anything.If the cat is good but the ACV or some other valve is bad,youll still fail just as quick as if you had a bad cat.A good cat cannot work without proper,metered air injection.
And on a side note,unless you just do it temporarily to get by the test,running a smog pump directly into the exhuast full time will fry the cat and could potentially torch the car.The ACV and rats nest meters the air injection so that it only injects air when needed.Too much air or air all the time will overheat the cat and cause it to melt down.Thats what the overheat sensors are for,to shut down the air injection if things get too cookin'.If its just for a few minutes to get by a smog test,then you should be OK.
02-25-05, 02:18 AM
#28
Savanna Rx-7
exactly steve
Originally Posted by steve84GS TII
Not really.The cat itself might bolt up,but Im guessing the later 13B cats are bigger.
Simply bolting another exhaust system up isnt going to solve the problem,unless it is by chance just a bad cat.You have to determine what part has failed before changing anything.If the cat is good but the ACV or some other valve is bad,youll still fail just as quick as if you had a bad cat.A good cat cannot work without proper,metered air injection.
And on a side note,unless you just do it temporarily to get by the test,running a smog pump directly into the exhuast full time will fry the cat and could potentially torch the car.The ACV and rats nest meters the air injection so that it only injects air when needed.Too much air or air all the time will overheat the cat and cause it to melt down.Thats what the overheat sensors are for,to shut down the air injection if things get too cookin'.If its just for a few minutes to get by a smog test,then you should be OK.
Simply bolting another exhaust system up isnt going to solve the problem,unless it is by chance just a bad cat.You have to determine what part has failed before changing anything.If the cat is good but the ACV or some other valve is bad,youll still fail just as quick as if you had a bad cat.A good cat cannot work without proper,metered air injection.
And on a side note,unless you just do it temporarily to get by the test,running a smog pump directly into the exhuast full time will fry the cat and could potentially torch the car.The ACV and rats nest meters the air injection so that it only injects air when needed.Too much air or air all the time will overheat the cat and cause it to melt down.Thats what the overheat sensors are for,to shut down the air injection if things get too cookin'.If its just for a few minutes to get by a smog test,then you should be OK.
thats why I said put a valve on it, and only open the valve/turn it on at the emissions stations
Last edited by kenn_chan; 02-25-05 at 02:20 AM. Reason: because I failed typeing class 20 years ago (&(*&(&
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