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Missing CAT and SES light. 99 GT

C

Corona99GT

New member
Hi guys been looking around on the O2 threads but could not find any thing really similar to my case. So lets start I have a 99 GP GT and my dumb bro decided to sell the CAT off my GP ,while I was working out of state, since he head you get more hp and CAT's are not demanded to be on a car he in Mexico but after that I noticed car was drinking gas like crazy and the SES light comes on every now and then, some times it comes on right after I start the engine some times it doesn't come on at all, and on other occasions it starts off and then 15 to 20 min later it comes on. had it checked the other day at AutoZone gave some codes don't remember then but guy told me something about faulty inyector, bad O2 sensor and don't remember last one. Any Ideas could this all be caused due to removing the CAT?
 


Corona99GT said:
Hi guys been looking around on the O2 threads but could not find any thing really similar to my case. So lets start I have a 99 GP GT and my dumb bro decided to sell the CAT off my GP ,while I was working out of state, since he head you get more hp and CAT's are not demanded to be on a car he in Mexico but after that I noticed car was drinking gas like crazy and the SES light comes on every now and then, some times it comes on right after I start the engine some times it doesn't come on at all, and on other occasions it starts off and then 15 to 20 min later it comes on. had it checked the other day at AutoZone gave some codes don't remember then but guy told me something about faulty inyector, bad O2 sensor and don't remember last one. Any Ideas could this all be caused due to removing the CAT?
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Your bro sounds like a stand up guy!
 
Corona99GT said:
And how would I go about deleting the trouble code take it to a shop and let them know the car has no CAT?

I don't have any code reader or any thing to plug on the car and do it my self btw.
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dunno if anyone on the forums is close to ya since you across the border. but any shop should be able to clear it . if you have autozone there i believe they can as well?

and you dont have to tell them you don't have a cat just let them know you want the code cleared :D
 


I would also look into replacing that faulty injector while your at it. Removing your cat has nothing to do with the fuel injectors and having a faulty fuel injector would explain why you are guzzling gas.
 
slick2500 said:
I would also look into replacing that faulty injector while your at it. Removing your cat has nothing to do with the fuel injectors and having a faulty fuel injector would explain why you are guzzling gas.
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How can I know which injector y faulty can you check it with a multimeter or something like that?
 
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