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Cobra Forums
The Terminator
Engine/Tuning
03 Cobra missing, backfiring, and sputtering below 3k Rpms. Need Avice
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<blockquote data-quote="olympic" data-source="post: 16413244" data-attributes="member: 168598"><p>Since the car has cams it's safe to assume it has been tuned. Has it always been this way for you or did it start suddenly? Perhaps it is tune related? First thing I'd do it clean the MAF sensor with electrical contact cleaner or brake cleaner. Sometimes they get fouled with oil from a cone filter. Then pull the vacuum line off the fuel rail pressure sensor, if there is fuel in the hose then the FRPS needs to be replaced. Since the issues occur mainly at part throttle it makes me think it's related to the MAF or oxygen sensors but it could be many other things. </p><p></p><p>After checking the codes and other obvious items the most useful thing would be a datalog so hopefully you got a tuner with the car. Post here if you need help setting up and reading the datalog.</p></blockquote><p></p>
[QUOTE="olympic, post: 16413244, member: 168598"] Since the car has cams it's safe to assume it has been tuned. Has it always been this way for you or did it start suddenly? Perhaps it is tune related? First thing I'd do it clean the MAF sensor with electrical contact cleaner or brake cleaner. Sometimes they get fouled with oil from a cone filter. Then pull the vacuum line off the fuel rail pressure sensor, if there is fuel in the hose then the FRPS needs to be replaced. Since the issues occur mainly at part throttle it makes me think it's related to the MAF or oxygen sensors but it could be many other things. After checking the codes and other obvious items the most useful thing would be a datalog so hopefully you got a tuner with the car. Post here if you need help setting up and reading the datalog. [/QUOTE]
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The Terminator
Engine/Tuning
03 Cobra missing, backfiring, and sputtering below 3k Rpms. Need Avice
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