16 replies to this topic

[P11 COV]

On my way back for Halfrauds (£1.59 for 6 lousy U nut thingys!) and the car suddenly lost power. Ir was like driving a VX with a 900cc engine. I could put my foot flat to the floor and it would pick up very slowly and then would acceletate reasonably but had no turbo boost at all. Was driving OK apart from that, no EML, misfire or anything like that. No codes on the scangauge. My first thought was a popped off pipe somewhere but in the garage I turned the engine off, and then restarted it as I changed my mind and suddenly it felt better. Took it out for a run around the block and all was fine again. More than fine actually. I am sure since my new AMM it has more power than ever. It was peaking at 23 psi. That the highest i ever seen it go. wheel spin in 3rd! So what had happened that would be rectified by switching the engine off for 5 seconds? Incidentally...I noticed after the run a round the block that the turbo was glowing red hot. I used to get that a lot in my stage 2 (non charge cooled) VXT. Never seen it in this one, which I put down to the charge cooler. So any ideas on this one chaps?

[Zoobeef]

Actuator stuck open maybe?

[P11 COV]

bump! Anyone other comments?

[Duncan VXR]

Act stuck open prob the issue is 23psi overboost your normal reading? If not you may now be running too much boost I run 24 but not sure many run much less. Faulty solinoid / wiring can give you same results DG

[P11 COV]

Act stuck open prob the issue is 23psi overboost your normal reading? If not you may now be running too much boost I run 24 but not sure many run much less.

Faulty solinoid / wiring can give you same results

DG

It used to peak at about 20 -21 but it does seem to be boosting a little higher now. Is the solenoid easy to change/access?

[Duncan VXR]

Yes easy to replace but I would start by having a closer look at you actuator and check the static break off point, and the wastegate / penny flap if moving free and easy. 2 solinoids - 1 on turbo and on on the inlet manifold - not sure I have seen them cause overboost though - thend to be the opp At 23 and above you can have issues with getting the hot gasses out the head and create high EGT's - especially on stock turbo - poss you glowing turbo? DG

[swisscott]

I once had a similar problem. Everytime I drove over a very bumpy surface the car suddenly felt incredibly limp. It was down to a temporary loose contact on the accelerator pedal forcing the SW to slow down everything. Shutting off and restarting after a while helped most of the time.

[TheStotts]

Had a slight misfire this morn so removed the coil pack to find water in one of the spark plug wells. Dried everything out and misfire gone but now have very low boost (2-4psi). The wastegate doesn’t appear to be stuck open, all boost pipes appear ok. Idle steady with pressure at -20psi. Currently got fuse 8 out. Has anyone got any other ideas as to what the issue might be? Great timing as due to go away tomorrow. If fuse 8 removal doesn't help is it 'safe' to drive? Any help appreciated. Cheers, Dave Ps Did you solve your issue P11 COV? Edit: No EML!

Edited by TheStotts, 31 May 2010 - 06:13 PM.

[TheStotts]

Fuse 8 removal didn't help Also tried running with AMM disconnected but no joy. Any ideas folks?

[snoopstah]

By far the most likely candidate is a boost pipe having come off. It's definitely worth double and triple-checking them. My car lost what felt like all boost on a North Weald day -- fortunately in my case the pipe that had come off was easy to spot, and I simply reconnected it and all was well again.

Edited by snoopstah, 31 May 2010 - 06:58 PM.

[TheStotts]

By far the most likely candidate is a boost pipe having come off. It's definitely worth double and triple-checking them.

My car lost what felt like all boost on a North Weald day -- fortunately in my case the pipe that had come off was easy to spot, and I simply reconnected it and all was well again.

Thanks for your reply

Hope it’s a stray pipe, only checked for connections so guess one might be split.

Will have another look when she's cooled down

[snoopstah]

Don't forget the ones connected to the second solenoid down by the inlet manifold

[TheStotts]

Don't forget the ones connected to the second solenoid down by the inlet manifold

Checked and double checked all pipes now. Also tested actuator using pump. Nice action

Currently gauge is connected to the fuel regulator, anywhere else I can connect this to help troubleshoot the issue? Thinking this might be electronic now. Any easy checks?

Just going out to remove the airbox to check for restrictions…

As always help appreciated

Did find this rather nifty ‘cave’ art on one of the arch liners

[TheStotts]

All sorted…. But no idea how!!!! Removed airbox, no restrictions everything looking fine. Another quick hose check and headed out without much hope. Warmed up, foot down, flying again! These cars are just so much fun that when they’re sick it’s sooooo frustrating. Hopefully just a temporary blip. Enjoy the sun everyone

[P11 COV]

Ps Did you solve your issue P11 COV?

No...it just fixed itself!

[TheStotts]

Ps Did you solve your issue P11 COV?

No...it just fixed itself!

I blame the car pixies

Still it's good investigating these things, learn loads about the car

[tibby]

+1   No boost, only 0.3 bar and max revs where 3500 rpm.... Also connected the LMM, nothing happend. Drove home with it. Throttle body reacted really slow. Turned the ignition off. Restarted it and everything works. No fault codes and no pending codes.   Did a search on the web and found this...... http://forum.opel-sp...showtopic=31140 Maybe something to keep in mind??? grtz