OK, now that I have your attention, I'm not sure I believe it either, but it has been a repeatable pattern so far.

Short version- new car, all stock, no secondary boost ever 10-5-(5 down to 2 at redline). I did the hose job, and found one of the lines to the charge control off. While there, I checked all the solenoids, one way valves, etc, and found that they were all OK. Put it back together and immediately got 10-6-10. Declared success, however temporary.

On the second or third outing after the hose job, I stopped at a car wash to rinse off some of the oil that had been leaking around the motor mounts. On the way home from the car wash, I got 10-5-5. Groan...

The next day, it was working fine again, so I thought perhaps it was heat related. I drove the car a while, then parked it long enough to get heat soaked. When I tried it again, it worked fine. I drove it a couple more times over the next week or so, with no further problems.

Today, I drove about 45 minutes, parked for 30 minutes, still fine. Drove 10 minutes, parked 15 minutes, still fine initially. As I was driving home from there, I hit a rain storm. Once I got closer to home, and the road was dry again, I tested the boost. Back to 10-5-5. Grrrr.

I did one more test, that was pretty interesting, and probably tells me right where the problem is if I only know what it meant. In 3rd gear, at 3000 RPM, WOT and I get 10-5-5. While still above 4500 RPM, I let off the throttle, then back to WOT again, and got 10 psi. So, it won't transition normally, but will come in if you let off and get back on. What the heck does this tell us?

Also, it seems like the only way water could cause a problem is if it's getting in an electrical connection, but I can't think of any connections that would have been wet in either case. Any other suggestions for what water might affect?

Thanks (yet again),

 

? interesting....bump ya.

Ask the mrccfl yahoo group list....someone in FL may be close to you to help you out. Also Nick from Ntech engineering is on the list and may give you some insight too.

Sorry, can't help more than that. Good luck.

 

Thanks for the thoughts. I've been wondering if the turbo control lever could be sticking. It's certainly in the wet zone. Maybe I should hit it with some PB Blaster???

Cheers,

 

You may have a cracked check valve thats going to the turbo control system. Take the pressure chamber off and inspect the check valve under it carefully for leaks. Its the hose closest to the front of the car coming of the pressure chamber. On that hose is a check valve and thats probably your problem.

 

Good idea Fritz, but that check valve was just vacuum tested 2 weeks ago when I had it all apart.

Thanks,

 

Check to see if your charge control actuator is working along with the TCA....you're definitely right about it being in the wet zone. It's not supposed to rust on that arm but maybe some debris is making it stick?

 

Next time I'm under there I'll pull that C clip off the TCA and see how free the lever feels. It's still not a perfect explanation, but it's the best one I've been able to come up with.

I'm really starting to think about some sort of remote camera that I can set up to watch those actuators while driving. I could also try to rig up a switch with a light. The problem is that you can T into the line, and you might be getting the proper vacuum/pressure signal, but the actuator still might not be moving. This is just way more complicated that it should be

Thanks,