1999 S70 ABS light, rough run, stall (Coil failure) Topic is solved

MattsS70 · Post by **MattsS70** » 31 Aug 2016, 07:48

mecheng wrote:wtf: RWD S70, and 1997 ??? Post some pics! Contact the person you sold it to.

It was too long ago i'm afraid...As for the pics, I posted them earlier in the thread.

MattsS70 · Post by **MattsS70** » 31 Aug 2016, 07:51

Pulled the codes and it looks like I'm just getting the P0303 which I think is a cylinder #3 misfire. Also the Check engine light is on...Then then I really get on the throttle, the car bogs down and the CEL light starts flashing at me! The car definetly doesn't like something thats going on!
-Matt

PS78 · Post by **PS78** » 31 Aug 2016, 09:02

Then you know what your next plan of action is. No. 3 coil is either barely functioning or is dead, which explains the bogging down part. Go grab a new or used coil on plug to swap out with the suspect coil. Take the cover off and see what's going on with it's connection and wire condition. If all appears well, swap the coils and hopefully your problem is solved. Might be a great time to change all your plugs out too if its been awhile. Pencil in an oil change as well since it's been getting that raw gasoline diluting it from no. 3.

Post by **abscate** » 31 Aug 2016, 11:00

Swap your Number 2 and 3 coil and see if the misfire code moves, first. Quick check before throwing parts.

MattsS70 · Post by **MattsS70** » 31 Aug 2016, 11:44

Thanks alot for the help... yep, that was what I was going to do. I took the cover off already and looked at the coils and connections, besides the plastic convolute all dried and cracked, everything looks good.

Could you guys tell me off hand what the order is on the cylinders from left to right? I'm sure I could look it up real quick too, just thought you guys could tell me quick if you know.

Thanks again,
-Matt

MattsS70 · Post by **MattsS70** » 31 Aug 2016, 11:51

MattsS70 wrote:it up real quick too, just thought you guys could tell me quick if you know.

HaHa, Nevermind, I answered my own question, I guess #3 is the one in the middle either way!

Post by **abscate** » 31 Aug 2016, 19:18

Number 1 at front if engine, that's the passenger side in Cleveland.

MattsS70 · Post by **MattsS70** » 01 Sep 2016, 07:34

abscate wrote:Number 1 at front if engine, that's the passenger side in Cleveland.

HaHaHa, thanks...

Well it worked. I swapped out the #3 coil with my other S70, (my winter car that im not driving now), and the issue went away. So now I'll order a new set of coild and plugs so I don't have to worry about this issue again. That only leaves me with the massively leaking power steering!

Thanks for the advice guy's. Saved me a lot of money!
-Matt

Post by **abscate** » 01 Sep 2016, 08:24

Excellent work Red Team. The coils on the RWD S70 are known to fail at 200k....

1999 S70 ABS light, rough run, stall (Coil failure) Topic is solved

Re: Help Diagnosing my S70