: engine problems!



VisBoss550
06-11-12, 11:36 PM
i have a 2004 ctsv my ls6 just passed 90,000 miles......and something is wrong, if i accelerate over 5,000 RPM the engine starts bogging down and the engine light starts flashing, im pretty sure this means there is a cylinder miss firing, iv been told it could be the valve springs, and that they should be replaced, others have told me it could be the coils since this only happens over a certain RPM. but even not over 5,000 RPM the car still drives weird, i can feel it.....hard to explain lol......even at idle it doesnt sound normal......anyone have any life saving info for me?! thanks.

JFensty
06-11-12, 11:51 PM
Have you checked for any stored codes? Could be a misfire. Have you changed plus or wires?

VisBoss550
06-12-12, 02:56 AM
just got the plugs and wires changed and its still doing it

odthetruth
06-12-12, 05:35 AM
Have you checked for any stored codes? Could be a misfire. Have you changed plus or wires?

^ This?

rand49er
06-12-12, 07:51 AM
Go to your nearby AutoZone ... they'll tell you in short order if you have any codes and tell you what they mean.

06BlackV
06-12-12, 08:28 AM
i have a 2004 ctsv my ls6 just passed 90,000 miles......and something is wrong, if i accelerate over 5,000 RPM the engine starts bogging down and the engine light starts flashing, im pretty sure this means there is a cylinder miss firing, iv been told it could be the valve springs, and that they should be replaced, others have told me it could be the coils since this only happens over a certain RPM. but even not over 5,000 RPM the car still drives weird, i can feel it.....hard to explain lol......even at idle it doesnt sound normal......anyone have any life saving info for me?! thanks.

just got the plugs and wires changed and its still doing it

For starters, Have u tried disconnecting the battery min or so? This procedure reboots your ecu,, i remember having erratic idle once and i did that to solve the problem.. Another thing would be the MAF sensor, maybe it needs to be cleaned?

Also, coils may not be outputting the right amount of voltage at high rpms, therefor causing the misfire. Based on ur description it will most likely be multiple coils. You can check these by using a voltmeter. The owners manual should give u the correct output voltage for the coilpack i believe.

darkman
06-12-12, 08:50 AM
As already indicated by others - get the code first. I can name no fewer than a dozen components that could cause these symptoms and to replace them all would cost hundreds - and you might still have the symptoms.

06BlackV
06-12-12, 08:53 AM
As already indicated by others - get the code first. I can name no fewer than a dozen components that could cause these symptoms and to replace them all would cost hundreds - and you might still have the symptoms.

Agreed.

VisBoss550
06-12-12, 08:30 PM
i got the codes checked, and it was misfire....they couldnt tell me what cylinder though, also we are getting the coils checked next to see if that was the problem...........im about to use this problem as an excuse with the mrs so i can get either an LsA or an Ls7 :D

Trunks817
06-14-12, 02:47 PM
coils are a bit cheaper than a new engine.