any suggestions

[justindre]

hi guys i have a misfire on my 2002 sts n* the only code that shows up is p 0300 and also flashes when im driving . i know 0300 means misfire detected. but here is the thing , for this car being pretty much computer controlled and more so than alot of other cars in 2002 why doesent it say at least which cylinder has the miss? how would i check to see which coil to possibly replace ( front, rear) ? i dont belive its the engine internally , all the injectors tick away without missing a beat? ANY SUGGESTIONS ?

[SPreston2001]

How do the plugs look?

[N*Caddy]

How many miles you have? Maybe is time for the 100K recommended tune-up, the ’00 and up have the nice design with coils on the spark plug, no expensive spark plug wires to change, just spark plugs (<$100).

[justindre]

i have 110000 mi on her i replaced the plugs 20000 mi ago , and they look normal.

[justindre]

i have 110000 mi on her i replaced the plugs 20000 mi ago they look normal too.

[N*Caddy]

What kind of plugs you got?
When I bought my car one of the first things I did was to replace the spark plugs with Bosch Platinum 4 (pretty expenive). Big, Big mistake, 3000 Km later it was worst than before. Eventually I took Ranger’s advice and changed back to the proper AC Delco (much cheaper too). I have over 60.000 Km since, purrs like a cat. Top of the hat for you Ranger

[SPreston2001]

Have you checked you COP boots? If you have a misfire chances are its something with your plugs or wires (in your case boots). Are you plugs properly gapped?

[dkozloski]

If you're getting a P0300 code and the SES is flashing you're in the process of destroying your CAT convertor as well. You had better get it fixed pretty quickly or it'll bite you hard in the wallet.

[justindre]

thanks for the info guess ill go out later and pull off the cop and check everything possible

[Ranger]

Originally Posted by justindre

hi guys i have a misfire on my 2002 sts n* the only code that shows up is p 0300 and also flashes when im driving . i know 0300 means misfire detected. but here is the thing , for this car being pretty much computer controlled and more so than alot of other cars in 2002 why doesent it say at least which cylinder has the miss? how would i check to see which coil to possibly replace ( front, rear) ? i dont belive its the engine internally , all the injectors tick away without missing a beat? ANY SUGGESTIONS ?

http://www.thetoolwarehouse.net/shop/WAE-76562.html

[justindre]

what would your educated guess be . i have 110000 mi i replaced the plugs (ac delco)20000 mi ago . do coils just go bad out of nowhere . how can you tell which bank the coils bad on ? thanks

[justindre]

Originally Posted by Ranger

http://www.thetoolwarehouse.net/shop/WAE-76562.html

thanks mr ranger i knew there had to be a way to check those coils

[98eldorado-lee]

read this page, http://www.aalcar.com/library/misfire.htm (worst case scenerio, blown head gasket)

[98eldorado-lee]

Originally Posted by 98eldorado-lee

read this page, http://www.aalcar.com/library/misfire.htm (worst case scenerio, blown head gasket)

Sorry try this website- www.aa1car.com/library/misfire.htm

[justindre]

Originally Posted by 98eldorado-lee

Sorry try this website- www.aa1car.com/library/misfire.htm

The important point to remember here is that a general misfire code (P0300) is probably not ignition related but is due to a vacuum leak or fuel delivery problem. un quote! THANKS ALOT ! i just remembered i blasted throgh some snow last night to get into a parking spot , it was pretty deep but also it was like 3 in the am sooo that snow was like an ice burg. maybe it kinkt a fuel line or messed with a wire , or could be amazingly a coincidence..