Have I Stuffed My Engine?

[Abo Bob]

On the freeway sunday morning I noticed on the AVC-R that I wasn't reaching full boost so I stupidly started upping the boost duty cycle to try and get the right boost.

What happened was that it all of a sudden pinged like a bastard and the engine light came on.

The engine light went straight back off and the car continued to drive fine.

Then I drove it around Wakefield park a few laps but the boost was really erratic. Parked and popped the hood to discover the hose going to the AVC-R was split at the T piece and hissing away.

Obviously that was easy to fix and the rest of the day at the track went off without hitch.

Then monday evening when I started the car I noticed it was idling a little rougher. It's not an uneven idle, just a bleh bleh bleh rather than the smoothness I'm used to. It still drives fine with full power.

Have I broken something?

[Beer Baron]

mate i don't think it would have done any bad damage in that brief time of running high boost. change in idle sound could be dirty plugs or something similar like that. i would take the plugs out and have a look at them and if you are really worried do a compression test and leak down test.

[ed]

Adam, did you do a diagnostic test to see what error code caused the CEL to come on? Should still be there within 50 key starts IIRC.

[Abo Bob]

Good idea Ed. I will do that tonight.

[slow_r31]

what happened is the engine over boosted, the ecu detected the rush of air and overfueled the motor. your bad idle is b/c of all the extra fuel that the car dumped when it overboosted has fouled your plugs

[ed]

what happened is the engine over boosted, the ecu detected the rush of air and overfueled the motor. your bad idle is b/c of all the extra fuel that the car dumped when it overboosted has fouled your plugs

<{POST_SNAPBACK}>

Makes sense to me.

Check the code to see anyway adam, then check your plugs

[rob82]

Ahh the plugs would have cleaned up on the track I would say. It would also take more than just an over boost rich mixture to foul your plugs. Check your codes and then pull the plugs just make sure their ok ie insulators not cracked also check for tracking.

[siksII]

is the car down on power? or power feels normal?

most likely some sort of electrical related problem but then again.....

best thing to do is a compression test that will tell u straight away if you have properly stuffed it

[Tangles]

hhm, after your gearebox troubles I hope the engine is ok mate!

brendan

[Abo Bob]

Well I checked with the consult cable and there were no errors!

Strange.

I'll have a look at the plugs on the weekend. If I get up early enough I will do a compression test but I don't know how to do a leak down so I'll have to get someone else to do that.

Car seems to still have full normal power atm.

I would have thought the track would clean the plugs up too.

Maybe they are cracked or something else.

The car runs pretty rich normally. About 10-10.5:1

[GunMetalR33]

reset your ecu, your car might still be running rich due to the overboost the other day.

Ps, I assume you have a standard ECU otherwise ignore me

[Abo Bob]

It's a stock but chipped ECU.

I used the reset function through the consult but I don't know if that does the same thing as a proper reset.

[GTR-80Y]

I pinged the engine for a bit cos of a faulty airflow meter. Idled rougher immediately, revs were steady but idle was bumpy. Engine now blown nearly.

Probly not as bad as mine, just tryin to scare ya buddy! lol

[wrxhoon]

Well I checked with the consult cable and there were no errors!

Strange.

I'll have a look at the plugs on the weekend.  If I get up early enough I will do a compression test but I don't know how to do a leak down so I'll have to get someone else to do that.

Car seems to still have full normal power atm.

I would have thought the track would clean the plugs up too.

Maybe they are cracked or something else.

The car runs pretty rich normally.  About 10-10.5:1

<{POST_SNAPBACK}>

Compression test will show if you done a ringland you dont need a leakdown test for that . To do a leakdown test you need a leakdown tester you cant do it if you dont have one .

[Abo Bob]

Ok I will do a compression test.

I just got another opinion from a quality engine builder.

Not looking good.

[wrxhoon]

Ok I will do a compression test.

I just got another opinion from a quality engine builder.

Not looking good.

<{POST_SNAPBACK}>

Thats what i'm afraid too , you probably cracked a ringland but it will show in the comp test , the suss cil will have lower comp , probably around the 70-100 psi .

Have you noticed any blow-by ? oil in the catch can ?

[Duncan]

let me know if you need a gauge mine seems to be out atm

[NewKleer]

reset via consult is only the self-learn data afaik, do the unplug battery leave overnight/press brake thingy to reset ecu fully.

[Abo Bob]

A bit more oil in the catch can yes. Blow by I haven't noticed.

Thanks Newkleer. Doesn't look like helping though

Duncan - are you saying I could borrow your compression testing gauge if only you knew where it was?

I'm off to the RB30det thread. :):)

[ed]

Hey adam, let me know if there's anything I can help with mate.