Question about 1994 Mercury Cougar
Car starts and runs fine but blows grey smoke and raw fuel from tail pipe i have replaced mass air flow sensor tps sensor air temp sensor and fuel pressure regulator
If you can get the car to Orielly's or Autozone they will check the OBD1 system for free to help you fix the problem.
This sounds like the fuel is not burning in the combustion chamber due to a lack of spark, excess fuel and smoke. On vehicles with a coil pack for every cylinder you would replace the coil pack but on your vehicle you have two coil packs, one for each side. If a coil pack is bad this would cause your problem (left or right). The auto parts people should be able to help you further, but I think this is the problem. (I had a similar problem).
Posted on Jan 22, 2013
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
I would check for trouble codes in the computer and fuel pressure next.
You need to figure out if you are dealing with a no spark or low fuel pressure issue to proceed.
Posted on Aug 14, 2012
Tips for a great answer:
May 16, 2017 | GMC Cars & Trucks
Oct 10, 2013 | 2004 Toyota ECHO
Sep 19, 2013 | BMW 530i Cars & Trucks
Aug 17, 2011 | 2001 Chrysler Town & Country
May 23, 2011 | 2000 Dodge Durango
Apr 27, 2011 | Volkswagen Jetta Cars & Trucks
Apr 22, 2011 | 1999 Chevrolet Silverado 1500
Fig. Fig. 3: The mass air flow (MAF) sensor connector-1995-96 4.6L and 1996 3.8L engines
TPS TESTING (Note, this procedure calls for a breakout box, but the same test can be accomplished by probing the back of the TPS connector at the brown/white and grey/white wires)
Apr 04, 2011 | 1995 Ford Thunderbird
Jan 14, 2011 | 2011 Nissan Juke
Aug 09, 2010 | 1999 GMC Sierra 3500
103 people viewed this question
Usually answered in minutes!