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Discussion Starter #1
I have a 89 camaro rs that runs fine at idle but going down the road you here a slite ping like when you run cheep low grade gas then the cheak engine light comes on then you lose power to about 1/2 but as long as the engine light is on there is no ping.I have spent 500 dollars on sensors not yet fixed problem can any one help???
 

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Discussion Starter #3
yes i did replace the knock sensor and the throdle pos sensor and oxygen s. i was wondering what it would act like with a partially clogg cat?
 

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What is the ignition timing?
 

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a clogged cat will make it ping as it will increase internal cylinder temp because of not letting the exhaust out...can you get it scanned???that would be helpful in the diagnosis...
 

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Discussion Starter #7
thanks for the help guys i will try cheaking the egr valve or see if cat is cloged if that dose not fix it i'll post it thanks again....
 
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