Question about Cars & Trucks
With 185K miles on it, my 2001 Escape has recently started stumbling when accelerating. No problems when idling or decelerating. I have installed new double-platinum plugs gapped at 0.050 and a new spark wire set, but the problem has not gone away. When accelerating in gear, I can sense that one or more cylinders are not delivering power until the engine gets up to around 2,000 RPM, at which point the engine reaches normal power with all cylinders firing. No DTC trouble codes. The 2.0L ZETEC engine fires 2 cylinders at the same time, one on its power stroke while the other is on its exhaust stroke. The spark-gap resistance on the power stroke is higher than on the exhaust stroke, thus delivering a higher spark voltage to the power stroke. But if there is back-pressure on the exhaust cylinder due to acceleration, I suspect that the spark voltage delivered to the power stroke might not be high enough, causing it to "miss". This might explain why all cylinders start firing when the engine reaches a steady RPM or decelerates, causing the back-pressure in the exhaust air-flow to come down. Any feedback on this train of thought? Am I missing something? Do I need a new cat converter?
You may be cruising down the wrong road with the exhaust idea but then you might be right. An exhaust restriction should also cause the engine to run hot. A faulty cat should also set some codes.
If the injectors are dirty, you may have a very lean fuel mix on one or more cylinders under acceleration, which would go away once you are not under load. And injector problems won't set any codes unless an injector stops working completely. Low fuel pressure could cause the same type of issue.
Posted on Dec 04, 2012
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
SOURCE: missing, loss of power, etc.
sounds from afar like a problem i had after installing after market spark plug cables on a diff. car. make sure you have factory-quality/ even mits. brand cables. (right parts vs. after mkt.?- no contest.)
Posted on May 06, 2009
Sounds like you may have gotten some debris in your exhaust pipe or something was clogging your muffler. Maybe the innerds of you Catalytic Coverter went and got stuck or the innerds of your muffler gave out. That would be the only few things I could think of to cause something like that.
Posted on Nov 16, 2008
Does it still turn on the "Check Engine" lite. Did your mechanic recommend the tune up to "fix" the check engine lite issue or vibration issue? You may want to go back to that shop and ask them why the repairs they recommended didn't fix it? However if the ignition is good, and the compression is good, that pretty much leaves fuel system as the issue. You may have an injector not working properly. Try some good injector cleaner first. Try the Chevron brand w/Techron. It is more expensive but the solvents in that mixture really work well. Don't overlook fuel pressure, but that shouldn't pick on one cylinder. A new fuel filter would be a good idea anyway.
Posted on Apr 03, 2009
Tips for a great answer:
Jul 04, 2013 | Toyota Avalon Cars & Trucks
Jun 06, 2017 | 2000 Nissan Xterra
Aug 05, 2009 | Chevrolet Corvette Cars & Trucks
Jul 21, 2009 | 1987 Chrysler Fifth Avenue
May 30, 2009 | 1993 Mercury Villager
Feb 07, 2009 | 2000 Ford F150 Flareside SuperCab
Oct 02, 2008 | 1998 Nissan 200SX
122 people viewed this question
Usually answered in minutes!