Engine problems

JAWNO · Post by **JAWNO** » Tue Apr 07, 2009 9:14 pm

hey guys, im new to this and seeking some advice about my subie lib 92...

i have had the coil pack replaced (i think thats wat its called) as it was failing causing the engine to stall upon load most noticably when going up hills. once replaced, the car ran well for a period of about 10 months before the problem again re-appeared.

the syptoms of this issue are as follows...
- upon depressing the pedal (automatic transmission) subsequently causing the engine to become under load the engine will knock (i recently replaced the spark plugs, and this solved the problem for a short period, but still knocking slightly although lately it has gone back to its old self).
- if the knocking is consistent (a hill), one of the cylinders will procede to miss fire causing loss of power and sometimes the engine to stall... upon stopping and if the engine is still running, the engine will vibrate of its harmonic balance.
- when the car is turned off for approx 30 seconds and turned over again, the problem is no longer present and the car runs normally, but again the engine still knocks

personally i think it could be the ignition timing, but im not really sure as to why i am asking for some advice/help...

JAWNO

justincase41 · Post by **justincase41** » Mon Apr 20, 2009 8:20 pm

What engine are you talking about? Have you replaced the cam/crank sensors?

nipper · Post by **nipper** » Thu Apr 23, 2009 7:26 am

How many miles/K on this car. When was the last time the timing belt was changed ?

nipper

AlpineRaven · Post by **AlpineRaven** » Thu Apr 23, 2009 4:48 pm

justincase41 wrote:What engine are you talking about? Have you replaced the cam/crank sensors?

Its EJ22.

JAWNO wrote:hey guys, im new to this and seeking some advice about my subie lib 92...

i have had the coil pack replaced (i think thats wat its called) as it was failing causing the engine to stall upon load most noticably when going up hills. once replaced, the car ran well for a period of about 10 months before the problem again re-appeared.

the syptoms of this issue are as follows...
- upon depressing the pedal (automatic transmission) subsequently causing the engine to become under load the engine will knock (i recently replaced the spark plugs, and this solved the problem for a short period, but still knocking slightly although lately it has gone back to its old self).
- if the knocking is consistent (a hill), one of the cylinders will procede to miss fire causing loss of power and sometimes the engine to stall... upon stopping and if the engine is still running, the engine will vibrate of its harmonic balance.
- when the car is turned off for approx 30 seconds and turned over again, the problem is no longer present and the car runs normally, but again the engine still knocks

personally i think it could be the ignition timing, but im not really sure as to why i am asking for some advice/help...

JAWNO

If I were you I'd check the timing to see if its in correct position, that would be the first place to look at. Just remove left and right covers not middle cover and check if the notches are at the top to match the centre (crankshaft) notch..
Cheers
AP

openflame06 · Post by **openflame06** » Sat Apr 25, 2009 6:32 pm

I'm guessing its EFI as well might be an idea to get the fuel pump/lines checked.

AlpineRaven · Post by **AlpineRaven** » Sat Apr 25, 2009 9:57 pm

openflame06 wrote:I'm guessing its EFI as well might be an idea to get the fuel pump/lines checked.

(yup its EFI)
could be - the pump could be on its way out!? (dropping pressure)
Cheers
AP

steptoe · Post by **steptoe** » Sun Apr 26, 2009 1:06 am

did it really take thirteen days for one of us to respond to this.

If he comes back I wanna know what engine oil grade is being used

JAWNO · Post by **JAWNO** » Wed May 06, 2009 6:19 pm

haha... man, i thought no one would reply hahaha...

yea, its ej22, efi, 205,000km's and im not sure when the timing belt was replaced... although lately its been getting worse. tends to do it the most when its cold now but again still on hills... im hoping its not the timing belt and something simple like a lead or pump because its going to cost a mint to get fixed if its the belt... sigh... its at the shop now and the blokes having a look at it... getting the scanner in and all to see if there anything on the memory... ill keep u posted

... again thanks for the replies haha

AlpineRaven · Post by **AlpineRaven** » Wed May 06, 2009 10:06 pm

Keep us updated.
Cheers
AP

JAWNO · Post by **JAWNO** » Sun May 10, 2009 8:44 am

ok ok.... so the ECU was checked, nothing significant was found... apparently the oil was old and the mechanic reckons that perhaps chunks of oil where blocking the hydraulic oil pump, preventing proper lubrication and messing with the valves under load subsequently causing one of the cylinders to miss fire... but he still thinks that the timing belt could be a worry.... but what he doesnt know is that this has occurred the last time i took it too him and if it were possibly the timing belt it would have most probably snapped already...

YouTube · Post by **El_Freddo** » Mon May 11, 2009 11:17 am

I'd also look at the fuel pressure regulator, this may be malfunctioning causing a leaning out of fuel under load = early detonation or an explosion that is too small to do the job. When was the last time your fuel filter was replaced?

If one cylinder is Knocking constantly it may be more than a fuel or spark issue. Does the engine knock on start up (deep thud that is constant with engine revs)? One way to check this is with a long screw driver, place the flat head/phillips head end on the block while the engine is running, put your ear on the handle end making sure no clothing is going to catch in the fan belt. If you hear the same knocking noise from the screw driver you can be sure its your big end bearings, this means an engine pull down.

That said, a big end bearing that's worn shouldn't be producing these issues... Have you had the cooling system pressure checked to make sure its not a head gasket?

All the best with this, I know it can be frustrating, especially when you've gotta watch the hip pocket...

Cheers

Bennie