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2001 subaru liberty ej25 sohc knock


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#21 Barbbachello

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Posted 09 October 2017 - 01:58 PM

Id think itd be 180 degrees out and wouldnt run at all. Exhaust opening when intake should be etc


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#22 Dylan720

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Posted 09 October 2017 - 04:24 PM

Thats what im thinking i just dont know what else to think of

#23 El_Freddo

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Posted 09 October 2017 - 09:25 PM

Have you put an oil pressure gauge on it?

 

The knocking to me sounds like mild rod knock that disappears once you've applied some throttle.

 

Also, our knocking tensioner did not bounce up and down like the ones I've seen displayed on youtube.  It was about 6 months old too.  What brand timing kit was fitted?

 

Does it actually drive ok or can't you get it that far?

 

That red cat converter is an issue and not good for it - the cat converter is either blocked or about to melt down with any unburnt fuel that's entering the exhaust system (as previously said by another forum member - seems like a shite load).

 

Cheers

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#24 Dylan720

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Posted 09 October 2017 - 09:46 PM

I just replaced the tensionor its firing 2 cylinders only its a dayco timing kit

#25 duncanm

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Posted 10 October 2017 - 05:44 AM

which 2?  Coilpack ok?



#26 Dylan720

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Posted 10 October 2017 - 06:58 PM

1 4 are firing could packs been replaced 4 times

#27 duncanm

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Posted 10 October 2017 - 07:35 PM

Ok

 

If I understand (someone correct me if I'm wrong here) - firing order is 1-3-2-4. So 1-2 and 3-4 share spark (wasted spark system). If 1 and 4 get spark, 2 and 3 must also.



#28 Dylan720

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Posted 11 October 2017 - 05:41 AM

Yeah they all have spark. Spark plugs have been chamged twice leads twice coil pack twice throttle body all sensors all cylinders have 150 psi compression and all injectors float testered and cleaned all fine and timing has been set by suby mechanic to

#29 crjohnson

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Posted 13 October 2017 - 08:40 AM

i once knocked the big main electrical plugs on the drivers side of the engine near the throttle body. some of the contacts must not have been making contact and the engine ran like shit.. Once I pushed them together all was perfect. Maybe check those plugs? 



#30 Dylan720

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Posted 13 October 2017 - 10:18 AM

I did that yesterday actually i cleaned them up and all still no change

#31 duncanm

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Posted 13 October 2017 - 10:20 AM

Ok, clutching at straws here  -- they didn't manage to swap around the injector harness when they pulled the heads off, did they?



#32 Dylan720

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Posted 13 October 2017 - 11:23 AM

No cause the injectors will still on the intake manifold pluged in still just unpled it from the big plugs left the harness on the manifold

#33 El_Freddo

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Posted 13 October 2017 - 08:12 PM

I'd be looking at the oil pressure. If the O ring in the oil pump is cactus it'll have low oil pressure at idle then build pressure with revs.

Have you identified where the knock is coming from yet? Use a piece of dowel, touch one end to different parts of the block and put the other end to your ear and listen. Engine must be running of course!

Cheers

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#34 Dylan720

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Posted 13 October 2017 - 10:12 PM

The knock is just misfire cause 2 cylinders are not fireing at all ide or revs and oil pressure is fine been tested

#35 El_Freddo

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Posted 14 October 2017 - 02:49 PM

Ok, so we now have a reason for the knock.

 

What are you looking into for the misfire issue on those 2 cylinders?

 

Spark leads the right way around?

 

Cheers

Bennie


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#36 Dylan720

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Posted 14 October 2017 - 07:01 PM

Ok ive Checked compression all 4 cylenders have 150 psi spark plugs changed twice spark leads done twice coil pack twice 2 sets of in jectors no one can seem to work it out at all all vacume leads are hooked up right been checked twice

#37 El_Freddo

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Posted 14 October 2017 - 09:33 PM

Alright. Got some good things there like healthy compression :D
 

The two cylinders that aren't firing, are they same side or opposite/diagonally across the engine?

 

Cheers

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#38 Dylan720

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Posted 14 October 2017 - 11:40 PM

Diagnly accross the engine front drivers side fires and rear passanger side fires only

#39 Dylan720

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Posted 16 October 2017 - 06:53 AM

If i could upload a video to show you whats doing you might have a better understanding of it

#40 duncanm

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Posted 16 October 2017 - 08:14 AM

If I understand (someone correct me if I'm wrong here) - firing order is 1-3-2-4. So 1-2 and 3-4 share spark (wasted spark system). If 1 and 4 get spark, 2 and 3 must also.

 

to reiterate...

261618_Noname_282.jpg

 

You're saying 1 and 4 fire, but 2 and 3 don't.

 

EJ wasted spark setup says 1 and 2 share a spark, as do 3 and 4.

 

Which suggests spark system (plugs and coils) are all ok.

 

Maybe the cam sensor is rooted?  Check the sensor, plugs, wiring and wheel for damage.  If you can, stick a CRO on the cam sensor signal and check its ok.

 

Are you getting any fault codes?






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