EA82 Pinging

[eppoh]

My 93 Loyale with EA82, with 80,000 miles has a bad ping- sometimes.

 

Have checked and re-checked timing and it is right on.

 

Good gas, etc...

 

Sometimes it does not ping at all, others, it pings badly during light acceleration.

 

Also noticed that when it does ping, it decelerates much faster when letting the foot off the accelerator.. wierd

 

It does not ping when the engine is cold, right after start up, but as soon as it warms up, the pinging starts - usually, not always.

 

I think it is fuel - running lean, but this thing has the SPFI.

 

How is the fuel delivery schedule done on this?

 

Any ideas?

[Turbone]

Check the disty rotor, make sure its tight on the shaft.

The disty should have the optical sensor in it also, so this being bad is a possibility.

 

This thread should actually be in old School forum.

[eppoh]

Check the disty rotor, make sure its tight on the shaft.

The disty should have the optical sensor in it also, so this being bad is a possibility.

 

This thread should actually be in old School forum.

 

Mine does the the optical sensor disty. How much play is acceptable on the rotor shaft?

 

If the shaft is worn ( after 80,000 mile) why would it be an intermittent problem?

 

I considered putting this in the Old School forum, but the Title page for that forum says "

Older Generation of Subarus (4 Viewing)

If your Subaru was built after 1980 but before 1990 or is a Loyale, Justy, XT or XT6 please post here.

 

Mine is a 93, but a Loyale too. So I dunno

[NorthWet]

The "or Loyale" covers you. No biggie, just trying to make a distinction between pre-Legacy and the Legacy-and-beyond vehicles.

[Turbone]

At 80K, the shaft shouldnt be worn, nor the sensor be necessarily bad.

When were the spark plugs last changed?

Might want to check to see if they are the correct ones also.

If you do replace them, get NGK's.

[4x4_Welder]

It sounds like a faulty EGR/EGR solenoid or related vacuum lines, or possibly a dirty MAF sensor.

[NorthWet]

It sounds like a faulty EGR/EGR solenoid or related vacuum lines...

Kind of my thought, too. Part throttle pinging might be because of too little EGR occurring.

 

Another thought: How did you set/check your ignition timing? Did you connect the green diagnostic connectors next to the wiper motor? (And remember to disconnect them afterwards?) And what did you set the timing to?

 

If the pinging occurs only during cornering (particularly left sweepers), it could be a PCV issue. You didn't mention special conditions, so I am assuming that this does not apply.

[eppoh]

EGR pulled off and checked. All vacuum lines smoked and also pulled a vacuum on them- good.

 

Can;t remember now what I set the timing at, but it is to spec- 21 BTDC I think.

 

Did it with the connectors and without. Does not make any difference.

 

PCV pulled, cleaned and checked.

 

There is also an issue with the idle speed. When it is not pinging, it is correct, then other times it is slow, about 600rpm and not smooth.

I wonder if a faulty fuel pump could cause this, because it seems like a fuel delivery problem.

 

Also, changed fuel filter.

 

Oh wait, I just re-read 4x4_Welder's post., Where is the EGR solenoid? I have not checked that. How is it checked?

Edited June 6, 2009 by eppoh