Intermittant boost problem.
Senior Member
Joined: 05-13-2008
Posts: 2,075
From: Knoxville, TN
When I added IC pipes, I could not see anyway of getting anymore clearance to the T-map, at its present orientation, even if I moved the IC foward a bit, which I did. When I pulled the Stock pipe out I could see where contact was made between the AC and the T-map. Also, when I first had the GMTU installed, the tech was scratching his head while telling me, that "that extra lower sensor, if awefull close to the AC.
Before I installed the pipes, I would get an occasional "hit" and "mis". So after F'in with it for a while, I flipped the T-map around and bumped the radiator foward about an inch-and-a-half. No more problems and plenty of clearance, at least for me.
Since I was changing out the pipes, I never checked to see if you could reverse the T-map on the stock pipe, and if it gained any more freedom.
Anyway you fix it, get it away from the downward tourque. I wonder if the Motor Mounts will stop this?
Before I installed the pipes, I would get an occasional "hit" and "mis". So after F'in with it for a while, I flipped the T-map around and bumped the radiator foward about an inch-and-a-half. No more problems and plenty of clearance, at least for me.
Since I was changing out the pipes, I never checked to see if you could reverse the T-map on the stock pipe, and if it gained any more freedom.
Anyway you fix it, get it away from the downward tourque. I wonder if the Motor Mounts will stop this?
Senior Member
Joined: 07-05-2008
Posts: 5,464
From: Akron Ohio
Stiffer mounts should help. But the engine lifts up in the front pulling the t map up and back not down.
GMPD said you could flip the T map but you had to watch the clearance on the front. Not all cars will be able to do this.
GMPD said you could flip the T map but you had to watch the clearance on the front. Not all cars will be able to do this.
Senior Member
Joined: 01-04-2010
Posts: 1,584
From: Imported from Detroit
Well my dealership pulled a code (don't have it in front of me but it was a code saying turbo psi problem = DUH). They replaced the lower tmap sensor and connector. Didn't fix the problem! I'm getting irritated at this point. I've done everything but draw a freakin road map and/or do the repair myself.
Member
Joined: 03-09-2011
Posts: 41
From: Indiana
The aftermaket is fine if you are willing to accept the problems when they happen and not expect GM to fix someone elses mistake.
For the most few people have GMTU issues and many who do often it comes down to the dealer they are working with.
My issues were just due to the accident I was in and there they mounted the IC. They installed new mounts and it was fine with the old T map but the new one was an issue. THey made the needed changes and it has been sweet since.
The only real issues are the techs that can't crimp or use the proper tools. Those who had it done right have had no issues.
For the most few people have GMTU issues and many who do often it comes down to the dealer they are working with.
My issues were just due to the accident I was in and there they mounted the IC. They installed new mounts and it was fine with the old T map but the new one was an issue. THey made the needed changes and it has been sweet since.
The only real issues are the techs that can't crimp or use the proper tools. Those who had it done right have had no issues.
If a automotive technician can't crimp or the dealership can't supply them with the proper tools, then they shouldn't be doing the job. Especially if they are charging you the amount that dealerships typically charge. They love making out of warranty owners pay for the in warranty repairs that they don't make money on. Which is why I either do it myself or if I don't have the tools then I go to a repair center that I do trust.
Senior Member
Joined: 07-05-2008
Posts: 5,464
From: Akron Ohio
Well, when the majority of the car is out of warranty, I have no problem going with aftermarket, if you get a good manufacturer, then quality is usually better than OEM and if you install it yourself, then quality is typically higher if you have experience in the area because it is your vehicle and you want it done right. At least I do, which is why I'm willing to accept any issues I come across as I'm the tech that installed them.
If a automotive technician can't crimp or the dealership can't supply them with the proper tools, then they shouldn't be doing the job. Especially if they are charging you the amount that dealerships typically charge. They love making out of warranty owners pay for the in warranty repairs that they don't make money on. Which is why I either do it myself or if I don't have the tools then I go to a repair center that I do trust.
If a automotive technician can't crimp or the dealership can't supply them with the proper tools, then they shouldn't be doing the job. Especially if they are charging you the amount that dealerships typically charge. They love making out of warranty owners pay for the in warranty repairs that they don't make money on. Which is why I either do it myself or if I don't have the tools then I go to a repair center that I do trust.
The aftermarket is good in most respects. Trust me I know as I make my living with it. But you have to be careful with some as with some of the specialty places can do it right or they can get it very wrong. Then it is your issue if it breaks parts. The key is just being ready to accpet the responsibility if something goes. Most people are willing but I see some here and else where who often want GM to fix someone elese mistakes. The GTP guy just could not understand why GM would not replace the pistons on thei cars with programers that screwed them up.
As for untrained dealer techs and tools not used. Well that is part of the reason GM wanted to shed some dealers. Many just do not keep up and often a guy on flat rate will take a short cut. Most know what they can get away with but some push the limits.
Just think some of these guys are working on Air Bags with the same crimps. I wonder how many of these are wrong.
There are good dealers like mine and there are many that should not be a dealer.
I really wonder how many dealers have a tech that is trained up to date on Turbo's. My dealer has one and it made things go smooth. I would be suprised if many dealers just don't have the right people in place.
Senior Member
Joined: 01-04-2010
Posts: 1,584
From: Imported from Detroit
Well the dealership can't figure it out. Per my service writer the tech was checking all the tubes, fittings, pressurizing etc...
I got a little frustrated with him about this.
THERE IS NO F'IN WAY THAT STUFF IS MESSED UP IF IT'S MAKING 16-18 PSI IN 2-5TH GEAR... IDIOT!! I told them, to stop dickin the dog and soldier the damn connector pins.
I think I'm going by there Wed. I want to talk to the tech, service writer, service manager, and perhaps chevy customer service. I'm getting pissed!
I got a little frustrated with him about this.
THERE IS NO F'IN WAY THAT STUFF IS MESSED UP IF IT'S MAKING 16-18 PSI IN 2-5TH GEAR... IDIOT!! I told them, to stop dickin the dog and soldier the damn connector pins.
I think I'm going by there Wed. I want to talk to the tech, service writer, service manager, and perhaps chevy customer service. I'm getting pissed!
Senior Member
Joined: 01-04-2010
Posts: 1,584
From: Imported from Detroit
That's the issue... there really isn't. Further, this dealer is where I purchased it from and gives free loaner cars.
The local pontiac, saturn, and I think Olds dealers closed. This dealership has a great deal of perks like loaner cars (only one around that does that). So everybody started going there. I never had these problems before. They simply are over worked now. They are or maybe were a great dealership all around. BUt now they have so many service customers that there is a week to week/half backup. They should hire more techs (must be plenty around from those old dealer closings) but much like any biz now a days, they are staffed for the lows not the peaks.
I should mention as well, that the service writter has become a bud over the years. We share a bunch in common including being bikers. He does what he can for me but is fighting the system as well. Like I said, I'm going by there today.
The local pontiac, saturn, and I think Olds dealers closed. This dealership has a great deal of perks like loaner cars (only one around that does that). So everybody started going there. I never had these problems before. They simply are over worked now. They are or maybe were a great dealership all around. BUt now they have so many service customers that there is a week to week/half backup. They should hire more techs (must be plenty around from those old dealer closings) but much like any biz now a days, they are staffed for the lows not the peaks.
I should mention as well, that the service writter has become a bud over the years. We share a bunch in common including being bikers. He does what he can for me but is fighting the system as well. Like I said, I'm going by there today.
Senior Member
Joined: 07-05-2008
Posts: 5,464
From: Akron Ohio
That's the issue... there really isn't. Further, this dealer is where I purchased it from and gives free loaner cars.
The local pontiac, saturn, and I think Olds dealers closed. This dealership has a great deal of perks like loaner cars (only one around that does that). So everybody started going there. I never had these problems before. They simply are over worked now. They are or maybe were a great dealership all around. BUt now they have so many service customers that there is a week to week/half backup. They should hire more techs (must be plenty around from those old dealer closings) but much like any biz now a days, they are staffed for the lows not the peaks.
I should mention as well, that the service writter has become a bud over the years. We share a bunch in common including being bikers. He does what he can for me but is fighting the system as well. Like I said, I'm going by there today.
The local pontiac, saturn, and I think Olds dealers closed. This dealership has a great deal of perks like loaner cars (only one around that does that). So everybody started going there. I never had these problems before. They simply are over worked now. They are or maybe were a great dealership all around. BUt now they have so many service customers that there is a week to week/half backup. They should hire more techs (must be plenty around from those old dealer closings) but much like any biz now a days, they are staffed for the lows not the peaks.
I should mention as well, that the service writter has become a bud over the years. We share a bunch in common including being bikers. He does what he can for me but is fighting the system as well. Like I said, I'm going by there today.
That is nice that he is you buddy but his service department can not solve your issues. Ride bikes with him and buy him a beer but I would look for a dealer with a well trained turbo tech that is not over worked. To solve an issue you need to find someone who can.
All issues can be solved, the hard part is finding the right guy to do it.
Senior Member
Joined: 01-04-2010
Posts: 1,584
From: Imported from Detroit
You may be right hyper...
The dealership took everybody's advice and soldiered the connections. NO HELP! Still not getting more than 7#. Service manager said that GM engineering has been no help and he was going to read around this forum for more advice.
1st gear - 7# boost can't hit 200ft lbs of torque.
2nd-5th gear - fine 16+# and 330+ torque
What now? Honest, they don't know, I don't know. Please help guys!
The dealership took everybody's advice and soldiered the connections. NO HELP! Still not getting more than 7#. Service manager said that GM engineering has been no help and he was going to read around this forum for more advice.
1st gear - 7# boost can't hit 200ft lbs of torque.
2nd-5th gear - fine 16+# and 330+ torque
What now? Honest, they don't know, I don't know. Please help guys!