Jump to content
Ultimate Subaru Message Board

Changing spark plugs on my 95 Legacy EJ22


Recommended Posts

Thanks I will check that out. I've never done anything with the timing belt. It seems like you have to get a lot of stuff off to get at it.

 

Do I have to take the alternator belt off and then pull the radiator out to look at it?

post-58763-0-99301800-1434589400_thumb.jpg

Link to comment
Share on other sites

I don't even bother to take the fans out, much less the radiator, but if you've never done a timing job before it makes it much easier to get to things and see what you're doing.

 

Beergarage.com also has a good writeup for the timing belt.

Link to comment
Share on other sites

hard for me to guess how the ECU would respond. It may be dumping fuel into the cylinders in reaction to exhaust diluted with fresh air from incompletely closed valves....?

 

If you could the fuel trims from FreexeFrame data (or better, live data) we might know more but, it's an easy, important thing to double check the valve timing. It also gives you a chance to see if there's any cam or crank seal leakage, if the belt looks old or chewed-up, etc.

Link to comment
Share on other sites

The fuel does not detonate properly leaving unburnt gas fouling the plugs. This will also kill your catalytic converter which can get real expensive.

This reminds me that I noticed some soot coming out of my tailpipe. There have been a lot of things popping up lately and I'm having trouble remembering all the symptoms. I've been taking a lot of pictures to help me out

post-58763-0-29013100-1434634335_thumb.jpg

Link to comment
Share on other sites

hard for me to guess how the ECU would respond. It may be dumping fuel into the cylinders in reaction to exhaust diluted with fresh air from incompletely closed valves....?

 

If you could the fuel trims from FreexeFrame data (or better, live data) we might know more but, it's an easy, important thing to double check the valve timing. It also gives you a chance to see if there's any cam or crank seal leakage, if the belt looks old or chewed-up, etc.

 

Sorry I'm not familar with FreexeFrame?

Link to comment
Share on other sites

sorry, FreezeFrame.

 

it's a limited amount of data some OBDII readers can get when reading codes.

 

fuel trims and temperatures etc from some sensors at the time the CEL was set. My old Innova 3100 can read FreezeFrame data.

 

not as good as live data from FreeSSM or maybe that torque app for smartphones.

 

if you have a smartphone, check into an elm327 BT adapter and the Torque app.

 

Link to comment
Share on other sites

The fuel does not detonate properly leaving unburnt gas fouling the plugs. This will also kill your catalytic converter which can get real expensive.

 

Here are some before and after pics of my plugs. the before is driving on the for about 3 hours, i pulled them this am to check them out.

 

the after is after trying to start the car this AM, the idle was rough, liquid came out of the exhaust and it shut off before it warmed up fully and wouldnt start again.

 

I was hoping to bring it to a mechanic I know to help me look at the timing, but probably not going anywhere today.

post-58763-0-61581400-1434641491_thumb.jpg

post-58763-0-15789600-1434641506_thumb.jpg

Link to comment
Share on other sites

No guarantee that it's the timing, but that's easy enough to check. (And free)

 

 

Could have a dead coolant temp sensor telling the ECU that its -40° so its flooding it with fuel.

Fuel washed piston rings will also cause the compression to be very low.

Link to comment
Share on other sites

No guarantee that it's the timing, but that's easy enough to check. (And free)

 

 

Could have a dead coolant temp sensor telling the ECU that its -40° so its flooding it with fuel.

Fuel washed piston rings will also cause the compression to be very low.

timing parts seemed fine. also found some records that the timing was replaced about 30,000 miles ago.

 

I replaced the coolant temp sensor, and found a broken vacuum line in the process. it was going into this part, is that the fuel pressure regulator?

post-58763-0-22066300-1435250733_thumb.jpg

Link to comment
Share on other sites

You'll get that if the engine is only running for a short time. Especially if there is alot of soot in the exhaust from running too rich.

 

With no vacuum line on the FPR it will be running full fuel pressure at idle, which will make it run rich.

 

The question now is, why is it still stalling.

Link to comment
Share on other sites

If I give it gas it will stay on. When the foot comes off the pedal, it dies shortly after.

 

maybe IAC or EGR? maybe another vacuum line is cracked? the PCV valve hose seemed pretty loose where it connects on the bottom (into the block).

 

I cleaned the egr valve and it seemed to be working ok. lines going in and out of it seemed clear.

New plugs, new wires, new coolant temperature sensor, timing components seem ok.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share

×
×
  • Create New...