another cel 66.. halp?

[kamineko]

a few months back QIK_KAS's 94? TT wagon developed a cel66 and i spend a few days pulling all the vac lines out and cleaning everything i could get to. i never experienced the issue and its been working fine until today

cel is on and engine will cut as soon as *any* boost is developed. engine is smooth off boost. the cutout is very abrupt and quite violent when in gear.

the engine will rev all the way to redline in neutral with very little throttle, as long as your not making any boost. wot at this point just kills the engine till the revs fall past 3k where it picks up and repeats. kinda like a speed cut. i assume its pulling the spark.

this must be a limp mode but its pretty difficult to drive. apparently turning off the car resets the cel and its fine until the problem re-occurs.

any ideas? im guessing maybe the differential pressure sensor or map sensor.. knock sensor is a possibility but you would expect a knock cel.

oh, apparently coasting downhill in gear is what triggers the cel and resulting limp mode.

weird. anyone struck this before? im going to have another look at it tomorrow night

[dubbedup]

66? is that the mysterious fault in tt system?

[johndoe1003]

last time someone asked about this someone else gave all the common causes of 66. its SOMETHING in the sequential system, i think a couple of the common failure points are primary trubo and blowoff valve, cant remember what else

[kamineko]

yar was hoping someone has come across similar symptoms. cell66 can mean a bunch of stuff.. i have the fault diagram for it somewhere too

[leggyfreak]

i had that changed the blow off valves and it went away but it has come back again now gonna spend the weekend going through everything

[dubbedup]

Ichi Ban seemed to know all the common faults

http://www.clubsub.org.nz/forum/index.php?topic=2876.0

[Guest boostin]

Is there a leak in the vacuum system?

[Guest]

 dubbedup said:

Ichi Ban seemed to know all the common faults

http://www.clubsub.org.nz/forum/index.php?topic=2876.0

How many people owe me a million dollars !!

[kamineko]

hmm yeah i'm sure i had good vac last time, i remember learning how the vac cylinder system worked, but then again it was working last time..

i'll have a crack tomorrow and see how i get on. cheers

[Guest]

Many years of experience

As for an ASK ICHI, No thanks - there are too many know it alls about here, just waiting for 1/4 of a chance to flame me for incorrect wording

It's so hard to diag cars over the www. This is where many heads are better than one - ( different ways of reading a post )

[RSB]

Hmm. Exactly that happened to my car 6 months or so ago. Turns out that the bullet connectors on the ZS controller/ECU harness were not 100% seated and shorting out.

Unless Kas has a ZS controller, it could be something electrical? either a short or perhaps moisture in around the ecu area.

Unlikely, but another angle nonetheless.

[Guest]

66 is effectively ecu loss of control over system ( it's vac operated for the majority of systems )

Any sensor ie pressure differential , exh change over solenoid etc etc will all log individual codes

Where as 66 is the entire system

Your ZS fault would have been alowing primary turbo pressure to be incorrect

[QIK_KAS]

Subarus are ghey.

[dubbedup]

lol it'l be on the road before ya know it....

[DRFVDR]

 QIK_KAS said:

Twin turbo Subarus are ghey.

Fixed it for you :)

hehehehe

[RSB]

 Ichi Ban said:

66 is effectively ecu loss of control over system ( it's vac operated for the majority of systems )

Any sensor ie pressure differential , exh change over solenoid etc etc will all log individual codes

Where as 66 is the entire system

Your ZS fault would have been alowing primary turbo pressure to be incorrect

Oh yup. Cheers.

Learnt that solder = win!