Question about 2006 Mercury Grand Marquis
About 6 months ago in a blizzard, I noticed that my car would hesitate almost every time I attempted to give it gas. It happened a lot during the snow storm since I was in traffic running around 15-30 mph for 2 hours. It did it so much that I was trying to pay attention to the RPM range when it happened.
It still has this issue and it is no longer cold outside. It does it when the car is cold or warmed up (although, I rarely accellerate much until it's warmed up). It's most noticable when on an on-ramp since you accelerate hard to get up to free way speeds. My commute is 60 miles one way with 70% being free way, so I run into this issue pretty often.
I run 89 octane, oil change every 2500, car has 55K on it now, K/N air filter. I bought some MAF cleaner and cleaned the MAF, but that didn't appear to help much.
Now, last night on my way home, the hesitation was as it has been, but running at about 1800 RPM's at 75mph, it felt like I was running into wind. There wasn't any wind. It wasn't all the time, but about 2 times I felt the car shudder a bit. Then this morning, my CEL came on about 10 minutes from my home.
I'm borrowing a buddies code reader tomorrow so I will see what code has been thrown.
Anyone have any thoughts?
Air and fuel mixture incorrect, restart the computer. Disconnect the negative or ground from the battery, turn the lights on to drain the computer faster, wait five minutes then reconnect. The computer is set to work with an old clogged filter, now you have more air coming in due to the K&N. The p0174 is the O2 sensor picking up on this, too much oxigen. Too much oxygen or not enough fuel. If restarting the computer does not work, replace the fuel filter and pressure regulator then restart the computer. You'll have to drive around for the computer to set, during this time do not mess with anything you'll throw off the computer. There should be some information in your vehicles manual about the relearn period. Before anything ceck for vacuum leaks, if there is air entering the engine after the MAF sensor the computer can not mesure it. Check for loose, disconnected or cracked vacuum hoses and replace if necessary. Start from there and let me know.
Posted on May 14, 2009
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.
New users get to try the service completely Free afterwhich it costs $6 per call 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
Tips for a great answer:
Jul 09, 2017 | Volkswagen Cabrio Cars & Trucks
Jul 12, 2009 | 1999 BMW 323 Series
Jul 04, 2009 | 1989 Cadillac Sedan DeVille
Jun 01, 2009 | 1997 Chevrolet C1500
Jul 30, 2008 | 1994 Honda Accord
Jul 10, 2008 | 2002 Lincoln LS
333 people viewed this question
Usually answered in minutes!