Lunareclipse02 Posted June 17, 2015 Share Posted June 17, 2015 I have a 2010 Ford Fusion 2.5L which has 175,000 miles on her. I have had the spark plugs changed around 30k ago. Its been a great car but now I have the random issue of the car not accelerating normally. It feels like it has a small amount of jerking while accelerating normally to reach highways speeds. It seems like it has full power then it loses power then gains it again. But what irritates me that it randomly does it and I cant replicate the issue. So If I pay a shop to find the issue it will be very unlikely they will find it. I dont want to waste my time or theirs. Would hooking it up to a computer will find my issue if it does have a ignition miss? I am sorta lost here and dont want to waste money on more spark plugs or coils if this doesnt fix my issue. I dont want to throw parts at it and hoping to fix it. Thanks 0 Quote Link to comment Share on other sites More sharing options...
mozz Posted June 17, 2015 Share Posted June 17, 2015 Air cleaner filter? Car has fuel filter inside the tank. 0 Quote Link to comment Share on other sites More sharing options...
Lunareclipse02 Posted June 17, 2015 Author Share Posted June 17, 2015 I just cleaned the kn air filter when I first dealt with this issue. I will look into fuel filter. 0 Quote Link to comment Share on other sites More sharing options...
jon50iowa Posted June 17, 2015 Share Posted June 17, 2015 Some with similar symptoms, report it was a Throttle body issue... 0 Quote Link to comment Share on other sites More sharing options...
mozz Posted June 17, 2015 Share Posted June 17, 2015 If the k&n was ever over oiled, oil gets on the maf and messes up the settings, get some maf cleaner and spray it. 0 Quote Link to comment Share on other sites More sharing options...
Lunareclipse02 Posted June 18, 2015 Author Share Posted June 18, 2015 Sorry let me clarify. I had this issue before and after the the filter was cleaned. I also remember there was a recall that was done towards the throttle body. 0 Quote Link to comment Share on other sites More sharing options...
thefoeyouknow Posted June 20, 2015 Share Posted June 20, 2015 Where do you think that filter oil goes? You should never use an oil-charged air filter on an engine with either forced induction (turbo, supercharged) or a Mass Air Flow sensor. There are many high performance paper pleat filters you can use that match the airflow profile of an oiled cotton gauze filter. Remove and clean the MAF (youtube it), install a paper filter, and report back. You can also be losing a coil, are your plugs gapped correctly? Are they good (non-stupid gimmicky) plugs? Have any coils ever been replaced? Would you say this happens mostly under load? After you've cleaned your MAF and installed a real air filter, you may want to see a dealer or well equipped independent shop. Ford's IDS scan tool has a really good power-balance test that will help identify the location of any misfire you might be having and it's easy to duplicate conditions while running it. Dealers all have it, but a number of larger independents will also have it. 0 Quote Link to comment Share on other sites More sharing options...
Lunareclipse02 Posted June 22, 2015 Author Share Posted June 22, 2015 I will take your advice on your air filter. I will also clean the MAF sensor. Yes it does loose power during a load. No the coils have never been changed. The plugs are not that old and they are OEM plugs and are in good shape with correct gap. Thank you 0 Quote Link to comment Share on other sites More sharing options...
Lunareclipse02 Posted June 24, 2015 Author Share Posted June 24, 2015 Update: I have cleaned my MAF sensor and throttle body with the proper cleaners. The throttle body was gunky, the MAF sensor look perfectly clean but cleaned it regardless. After using MAF sensor cleaner on it and letting it dry while I cleaned the throttle body with throttle body cleaner, I had some strange issues. Started the car back up and it had a rough idle then smoothed out. Then I decide to rev on it a bit, after I hard rev when the motor is idling down it pulses between 2000 rpm to 2500 rpm for a few seconds. It does this every time now. But the car still drives the same, it still has its laggy feel when it is trying to get to highways speed. Was wondering if I should bite the bullet and replace all of the ignition coils and plugs. If this doesnt solve them problem at least that could be some preventative maintenance. Is there any coils that are just as good as oem but at a lower cost?? 0 Quote Link to comment Share on other sites More sharing options...
jon50iowa Posted June 24, 2015 Share Posted June 24, 2015 (edited) Having you considered visiting the dealer. They the know their vehicles really well.. Might be worth the expense on this one. Edited June 24, 2015 by jon50iowa 0 Quote Link to comment Share on other sites More sharing options...
thefoeyouknow Posted June 24, 2015 Share Posted June 24, 2015 It's costly to just throw a whole set of coils at it, so I would seek out a shop with IDS to do a power balance test. Probably you need just one, but there's no way for you by yourself to determine which one without codes or a power balance test. 0 Quote Link to comment Share on other sites More sharing options...
JoeliusZ28 Posted July 23, 2015 Share Posted July 23, 2015 My car had a problem at around 100k miles where it would randomly bog and not accelerate. I believe the culprit ended up being a faulty EVAP purge valve. Prior to that diagnosis i told the dealer i thought it was the throttle body. They said it wasnt, but they replaced it for me anyway. 0 Quote Link to comment Share on other sites More sharing options...
me32 Posted August 3, 2015 Share Posted August 3, 2015 Any updates on this? 0 Quote Link to comment Share on other sites More sharing options...
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