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Have a 2008 Cadillac STS V6 AWD. Under load especially up a

Customer Question
hill the engine misfires badly...
Have a 2008 Cadillac STS V6 AWD. Under load especially up a hill the engine misfires badly. 7000 miles ago the dealer did the timing chain repair. Currently has 76,000 miles. When this problem started they said it had misfire codes for 1 &6. They say they checked plugs and coils but they were OK. Also claimed they could not replicate the issue. All you have to do is floor it or go up a hill of any size and the engine misfires. Thoughts?
Submitted: 1 year ago.Category: Cadillac
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Answered in 43 minutes by:
3/12/2016
Cadillac Mechanic: ggrote1, ASE Certified Technician replied 1 year ago
ggrote1
ggrote1, ASE Certified Technician
Category: Cadillac
Satisfied Customers: 17,287
Experience: 26 year GM master tech
Verified

I am sorry for the long wait

does the check engine light ever come on ? and its not setting any codes ?

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Customer reply replied 1 year ago
it comes on. Flashes when misfiring and then stays on. The Chevy dealer where I bought it said the codes were for #1 and #6 but they could not replicate the problem and they claimed the plugs and coil packs were OK.
Cadillac Mechanic: ggrote1, ASE Certified Technician replied 1 year ago

sounds like they didnt really diagnose this issue correctly

have you tried another shop ?

or drove the car with them to duplicate the issue and show them it yet ?

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Cadillac Mechanic: ggrote1, ASE Certified Technician replied 1 year ago

how are you making out ?

if you have any questions please ask as i do not get credit for my work until you rate me here at Justanswer

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ggrote1
ggrote1
ggrote1, ASE Certified Technician
Category: Cadillac
Satisfied Customers: 17,287
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