Over boost code solution questions !!!
#31
just frustrating that I cant flor it, I have to watch how much boost I'm pushing then let off and get on it again...
In less than 2 weeks, it was slamming to 25 PSI in the blink of an eye (didn't even have to floor it anymore!), accompanied by a screech. I was trying to be careful, but old habits... I had to fix this. I replaced the solenoid, problem solved.
Unfortunately, now I have low compression in cylinder #4. It may just be coked up valves, but it could be something serious. I hope you can get yours fixed soon.
I'm not saying that the solenoid/ elec. connector is the only possible cause, But in my research, it was much more often the cause than anything else. If the elec. connector is falling apart, there's a post in that css link I provided for that too. If you haven't read those threads yet, there's good information. And after seeing some of the attitudes over at css, you'll appreciate the people here even more.
Last edited by RJ_RS_SS_350; 04-14-2017 at 01:47 AM.
#32
Understand, brother, I was in that exact same place less than 2 months ago. It started boosting to 20 PSI and P0234 with no turbo (2-3PSI), not really full limp mode. But when you're trying to pass a semi truck, and all of a sudden no turbo? Not good.
In less than 2 weeks, it was slamming to 25 PSI in the blink of an eye (didn't even have to floor it anymore!), accompanied by a screech. I was trying to be careful, but old habits... I had to fix this. I replaced the solenoid, problem solved.
Unfortunately, now I have low compression in cylinder #4. It may just be coked up valves, but it could be something serious. I hope you can get yours fixed soon.
I'm not saying that the solenoid/ elec. connector is the only possible cause, But in my research, it was much more often the cause than anything else. If the elec. connector is falling apart, there's a post in that css link I provided for that too. If you haven't read those threads yet, there's good information. And after seeing some of the attitudes over at css, you'll appreciate the people here even more.
In less than 2 weeks, it was slamming to 25 PSI in the blink of an eye (didn't even have to floor it anymore!), accompanied by a screech. I was trying to be careful, but old habits... I had to fix this. I replaced the solenoid, problem solved.
Unfortunately, now I have low compression in cylinder #4. It may just be coked up valves, but it could be something serious. I hope you can get yours fixed soon.
I'm not saying that the solenoid/ elec. connector is the only possible cause, But in my research, it was much more often the cause than anything else. If the elec. connector is falling apart, there's a post in that css link I provided for that too. If you haven't read those threads yet, there's good information. And after seeing some of the attitudes over at css, you'll appreciate the people here even more.
So went through the piping no leaks... Don't know how to check the wastegate spring but also another thing is that when I hold the boost steady at 14-15psi for a few seconds it will still put into limp mode, someone told me the throttle body could be cracked... I'd rather not replace the turbo of that's not the problem also, still trying to narrow down.... Advise please !!! No vacuum leaks or IC piping leaks and now that I had the forge bov valve trying to hold any kind of boost for a little bit of time it releases pressure....
#33
Yes, 3 seconds of continuous overboost or 50 seconds cumulative overboost will pretty much shut down the turbo.
Did you see the information I gave you in post #13?
#34
So went through the piping no leaks... Don't know how to check the wastegate spring but also another thing is that when I hold the boost steady at 14-15psi for a few seconds it will still put into limp mode, someone told me the throttle body could be cracked... I'd rather not replace the turbo of that's not the problem also, still trying to narrow down.... Advise please !!! No vacuum leaks or IC piping leaks and now that I had the forge bov valve trying to hold any kind of boost for a little bit of time it releases pressure....
#35
it happened to me last night. 2009 - owned since new - had the gm stage 1 done 6 yrs ago. so gm has a tsb that states the wastegate rod is out of adjustment - - I don't believe that can be the case - I bought the car new & no one ever touched the turbo, so , how can the rod be out of adjustment on it's own? wouldn't it be out of adjustment from day 1? is it true the solenoid is not available seperatly - you have to replace the turbo just to get the solenoid?
#36
Others have posted a replacement solenoid is available in the aftermarket, the adjustment can be considered out if the solenoid is faulty, so the computer can't read specific parameters
http://www.full-race.com/store/efr-t...ent-kit-1.html
http://www.full-race.com/store/efr-t...ent-kit-1.html
Last edited by Oldblue; 02-26-2016 at 02:39 PM. Reason: Added link
#38
it happened to me last night. 2009 - owned since new - had the gm stage 1 done 6 yrs ago. so gm has a tsb that states the wastegate rod is out of adjustment - - I don't believe that can be the case - I bought the car new & no one ever touched the turbo, so , how can the rod be out of adjustment on it's own? wouldn't it be out of adjustment from day 1? is it true the solenoid is not available seperatly - you have to replace the turbo just to get the solenoid?
#40
The solenoid on the turbo is the boost control solenoid, controls the wastegate.
The solenoid on the intake manifold is the bypass solenoid, controls the bypass valve. Yes, it is still available from GM.
SOLENOID | Genuine GM | 12633411
Ecotec LNF Bypass Valve Solenoid 12633411
If it were a code for underboost, we would be looking at the bypass solenoid as a possible culprit.
The solenoid on the intake manifold is the bypass solenoid, controls the bypass valve. Yes, it is still available from GM.
SOLENOID | Genuine GM | 12633411
Ecotec LNF Bypass Valve Solenoid 12633411
If it were a code for underboost, we would be looking at the bypass solenoid as a possible culprit.