Engine missing

Asked by Feb 25, 2016 at 09:09 PM about the 2005 Subaru Forester X

Question type: Maintenance & Repair

2005 Outback just started missing. "Check engine" light is on and the cruse control light is blinking. The mechanic wants to replace the ignition harness and all 4 plugs. Is it necessary to replace all the plugs?

Just drove up & down the road and all is back to normal. Where should I look for the loose connection?

4 Answers

5,105

So if the car is missing, the spark plugs could be a good place to start. Are the codes from the Check Engine light misfire on any of the cylinders, what are the codes saying? I just bought a 2005 Outback 2.5 XT for project car and the same thing happened when I changed the oil. I didn't fasten the oil cap on the top of the engine tightly enough. I retightened and reset the codes. BAM, no sputter, no check engine, and no cruise blinking. Check the Gas Cap too. No mechanic should be doing repairs without showing you the codes from the OBDII reader. Ill keep an eye on this thread if you answer my initial questions.

6,170

1. Scan the CEL. If it's a simple miss it'll be a PO30x code, the x=cylinder missing. Inspect and drape AWAY from exposed metal the ig wires, twisting them a few degrees on the coil towers away from metal. Recheck status. Erase code if necessary. 2. Still missing? Check that particular plug boot, and if necessary the plug for fouling from oil leak past its shrunken insulator. If necessary wipe oil off, replace plug and ensure wire boot is pushed HARD onto plug end (it might "click" a bit). 3. Still missing? Swap out coilpak with a good used one as once in awhile they crack and short to ground intermittently. NOTE: intermittent missing is very common with these in rainy or high condensation areas. Usually the system will self-dry when normally heated, but not always. Usually you can see a small white mark on a leaky wire's discharge spot where it shorted to a metal ground; draping it away 1/4" is usually sufficient...or adding a sleeve/tape insulator. If not replace the wire, as a nice set of NGKs is cheap. 4. Still problematic? Check relevant cylinder's fuel injector connector. Clean injectors with that Chevron cleaner or similar if necessary. 5. Still missing? You may have to take a head off to lap a valve, but that's extremely rare. Good luck. Ern

1 of 1 people found this helpful.
7,055

Ern, does the CEL-on & flashing cruise light have anything to do with mixture conditions that will ruin the emissions system / cat.converter?

6,170

Not usually. But running with an intermittent cylinder or other abnormal condition (like a bad O2 sensor...of which the '04 PZEV and '05 OB 2.5i have FIVE!) will overload the system. It's one of the several reasons I tended to avoid '05 (first year new body) OBs and Legs. Knowledge is key here: most CELs are for the ubiquitous P0420 code, for which Subaru generally has dodged a bullet, blaming the "cat insufficiency" on non-California richer fuels used in the salt belt. So it gets tricky. Best to buy a decent cheap scanner (like the pocketable $40 Actron) and keep in glovebox forever. I wear one around my neck at the auctions....Ern

2 of 2 people found this helpful.

Your Answer

Forester

Looking for a Used Forester in your area?

CarGurus has 38,639 nationwide Forester listings starting at $1,000.

ZIP:

Subaru Forester Experts

  • #1
    Nick Eidemiller
    Reputation
    3,920
  • #2
    walth
    Reputation
    3,370
  • #3
    lifeson34
    Reputation
    2,780
View All

Related Models For Sale

Used Subaru Outback
426 Great Deals out of 36,733 listings starting at $1,000
Used Honda CR-V
903 Great Deals out of 59,695 listings starting at $1,495
Used Toyota RAV4
838 Great Deals out of 53,246 listings starting at $1,600
Used Subaru Impreza
201 Great Deals out of 22,704 listings starting at $1,505
Used Subaru Legacy
220 Great Deals out of 15,108 listings starting at $1,795
Used Subaru Impreza WRX
40 Great Deals out of 1,173 listings starting at $1,500
Used Toyota 4Runner
337 Great Deals out of 26,793 listings starting at $1,800
Used Ford Escape
1,311 Great Deals out of 103,948 listings starting at $895
Used Toyota Highlander
602 Great Deals out of 37,444 listings starting at $1,500
Used Toyota Tacoma
717 Great Deals out of 45,626 listings starting at $1,000
Used Honda Accord
1,129 Great Deals out of 73,674 listings starting at $1,100
Used Subaru Impreza WRX STI
26 Great Deals out of 620 listings starting at $9,490

Used Cars For Sale

2018 Subaru Forester For Sale
9 Great Deals out of 28,578 listings starting at $20,187
2017 Subaru Forester For Sale
57 Great Deals out of 1,746 listings starting at $18,492
2016 Subaru Forester For Sale
47 Great Deals out of 1,013 listings starting at $12,991
2015 Subaru Forester For Sale
131 Great Deals out of 2,562 listings starting at $8,637
2014 Subaru Forester For Sale
37 Great Deals out of 996 listings starting at $9,795

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.