Emission light on

2007 FORD TAURUS
80,000 MILES • 4WD • AUTOMATIC
Avatar
JUDITH BELLI
  • MEMBER
  • 7 POSTS
About Two weeks ago, auto not having much power when driving. Son did complete tune-up replacing spark plugs, wires, coil. It is running 80% better but still rough. It was checked on machine at a auto supply store which indicated numbers four and five plugs not working 100%.

Forgot to mention emission light will not go off
Jan 5, 2018 at 9:59 AM
Advertisement
Avatar
MHPAUTOS
  • CERTIFIED EXPERT
  • 31,937 POSTS
Check compression's, check for vacuum leak at inlet manifold, check injectors if all else is okay, start here.
Jan 5, 2018 at 6:04 PM
Avatar
JUDITH BELLI
  • MEMBER
  • 7 POSTS
Appreciate your response. Will check out all these possibilities. Thank you so much.
Jan 6, 2018 at 8:10 AM
Advertisement
Avatar
STRAILER
  • CERTIFIED EXPERT
  • 53,854 POSTS
Hello,

To me it sounds like you may have a blown head gasket between to cylinders which a compression test will confirm. (two low cylinders)

Here is a guide to help you get the job done.

https://www.2carpros.com/articles/how-to-test-engine-compression

This guide can help as well

https://www.2carpros.com/articles/engine-misfires-or-runs-rough

Please let us know what you find. We are interested to see what it is.

Cheers, Ken
Jan 8, 2018 at 2:00 PM
Avatar
JUDITH BELLI
  • MEMBER
  • 7 POSTS
Thought it might be a blown head gasket; car getting checked out today with mechanic at local service garage. Will let you know. Thank you for all your responses.
Jan 8, 2018 at 2:17 PM
Avatar
JUDITH BELLI
  • MEMBER
  • 7 POSTS
Just found out that the coil we bought & put on car was defective & has to be brought back to AutoZone. Supposedly auto is working fine now. Haven't got bill yet. Thanks for all your responses.
Jan 9, 2018 at 10:39 AM
Avatar
STRAILER
  • CERTIFIED EXPERT
  • 53,854 POSTS
Thanks for getting back to us. Autozone parts can sometimes be a little dodgy. Please let us know how much it costs please

Cheers, Ken
Jan 9, 2018 at 11:46 AM
Avatar
JUDITH BELLI
  • MEMBER
  • 7 POSTS
Well, the first coil was about $63 & took 2 min to install. Now don't know what service garage will charge when they were supposed to jut check out problem & let us know, not repair. Very upset!
Jan 9, 2018 at 12:15 PM
Avatar
STRAILER
  • CERTIFIED EXPERT
  • 53,854 POSTS
It's just car stuff, it will pass. When doing the job next time get OEM parts they cost more but worth it. Amazon has good prices on OEM parts.
Jan 9, 2018 at 1:19 PM
Avatar
JUDITH BELLI
  • MEMBER
  • 7 POSTS
The cost of "checking problem" & repair came to $137. Awful amount since the cost of coil was $63 & 2 min to install by son himself. Oh well. Already in debt up to ears.
Jan 9, 2018 at 2:31 PM
Avatar
STRAILER
  • CERTIFIED EXPERT
  • 53,854 POSTS
Sorry about that, at least the car is fixed and the questions are free so that works. Use 2CarPros anytime, we are here to help. Please tell a friend.

Cheers, Ken

Jan 10, 2018 at 11:32 AM
Avatar
JUDITH BELLI
  • MEMBER
  • 7 POSTS
I agree & I will!
Jan 10, 2018 at 1:02 PM