Question about 1998 Ford Escort

1 Answer

Stutters/misses, especially under acceleration

Subaru Impreza Outback Sport. At idle, every minute or two there's a miss. Under anything but gentle acceleration, it misses like crazy, jerking and stuttering.
Had spark plugs, wires, fuel filter replaced. Fuel additive didn't help.
Ignition coil looks good, no corrosion.
It's been doing this for maybe 500 miles. Sometimes seems to improve or even go away, always returns.
Subaru mechanic on phone said it could be a fuel-air mixture sensor that's off, suggests I bring it in to plug into their analyzer.
Any suggestions? Thanks!!

Posted by on


1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Ford Expert
  • 251 Answers

Hello, It could be related to your A/F ratio sensor, but it also could be a faulty (stuck open) EGR valve if your vehicle is equipped with one. Depending on the year of your vehicle you can disconnect the source vacuum line for your EGR valve and plug it off with a golf "T", small bolt, or any thing that will fit snug into the vacuum line. If it cures the problem, you'll have to replace the vacuum solenoid that supplies vacuum to the EGR valve. If nothing changes it could just mean that the valve is so carboned up that it can't close all the way. You can remove the valve to make sure that all of the passages are clear. If they are clear of carbon build up, I would then take it to a shop for more testing. You can find the location of you EGR valve in any repair manual. I hope this info helps...(subytech1)...

Posted on Aug 25, 2009

  • Brandon Johnson
    Brandon Johnson Feb 07, 2010

    Hello, I would do a quick check before you spend money at a shop for diagnosis. With your hood open, look for your EGR valve, it should be mounted on your intake manifold towards the drivers side on the back of the intake. It will look kind of like a silver or goldish colored flying saucer with one vacuum line coming out of the side of it. Pull off the vacuum line and plug the line with a somewhat snug fitting bolt, golf tees work perfect when you can find one. Then go and drive it, If your car runs like a champ after that, you will need ether one or both of these: EGR valve, and/or EGR valve vacuum actuator. If this is your problem, which it sounds to me like it is, your EGR or Exhaust Gas Recirculation valve is allowing cooler exhaust gasses to enter the intake inhibiting proper combustion causing your vehicle to "choke-out" on acceleration. It is mainly utilized during long tern freeway type cruising to lower overall combustion chamber temps resulting in a large reduction of the NOX(oxides of nitrogen) emission which is caused by high combustion temps. I hope this info helps...(subytech1)...



1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this 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.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Subaru outback impreza - 07 heater blower noisy

its under the glove box facing up. you remove it by dropping it down.
there should be 2-4 screws and the drain hose

Dec 06, 2013 | 2007 Subaru Impreza Outback Sport Wagon

1 Answer

97subaru impreza outback sport wagon 2.2 1234 misfire replaced plugs ,wires, coil pack, fuel filter added injector cleaner check engine light blinking with no code.what do you think i should do next?

check you ecu. same problem happen to me in an izuzu rodeo. I let my fuel get to low and it sucked dirt into the filter and messed with that and it set off a code for the ecu and messed it up but if i had just replaced the ecu first i wouldnt have had to change the injectors or anything.

Oct 04, 2010 | 2007 Subaru Impreza Outback Sport Wagon

2 Answers

Rough(missing) when cold. Smooths out a little after warming up.

It is not unlikely a plug wire got put back on on the wrong plug. These cars will still run with a few plugs wrong.

May 29, 2010 | 1998 Subaru Impreza

1 Answer

1999 subaru impreza outback sport with rust on the under carriage

Most Subarus have a coating on the bottom of the chassis called Cosmoline, which is an anti corrosion compound sprayed on at the factory to protect them during shipping. The only thing I can recommend is to have your brakes inspected for siezed caliper slide bolds, severe rotor deterioration, and sway bar end links that may be broken or are about to break. You should also have the exhaust looked at because that is usually the first to go and the biggest pain when trying to get it emissions tested. I hope this info helps...

Apr 04, 2009 | 1999 Subaru Impreza

1 Answer

Sometimes I have trouble starting my 2007 Subaru Impreza 2.5i

check ur idle speed control passenger side in front of intake i think

Mar 20, 2009 | 2007 Subaru Impreza WRX Sport Wagon

1 Answer

2007 subaru outback headlight problem

Each head lamp also has it's own relay, you can rule the relay out by swapping the left head light relay with the right head light relay & see if the problem moves to the other side...The relays are also in the same under hood fuse box.

Sep 25, 2008 | 2007 Subaru Impreza Outback Sport Wagon

Not finding what you are looking for?
1998 Ford Escort Logo

400 people viewed this question

Ask a Question

Usually answered in minutes!

Top Ford Experts


Level 3 Expert

79865 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22326 Answers


Level 3 Expert

5687 Answers

Are you a Ford Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides