GMP Upgrade Problems
Member
Joined: 08-25-2009
Posts: 32
From: Ontario
Symptoms: random miss fire, low boost in all gears (max 5psi), low power as if timing is retarded. stalling on initial acceleration from a stop.
Previously they have changed the MAP sensor provided in the kit, soldered the connections, replaced a Turbo charger as the code indicated the waste gate was not functioning. The other issue is that when these things start happening, the check engine light does not always come on. They were going to change the ECM today if it came in. I'll find out more possibly Monday.
Previously they have changed the MAP sensor provided in the kit, soldered the connections, replaced a Turbo charger as the code indicated the waste gate was not functioning. The other issue is that when these things start happening, the check engine light does not always come on. They were going to change the ECM today if it came in. I'll find out more possibly Monday.
I had similar problems. My tech found a harness to the MAP had burned through and bruned a wire. The lower stage 1 map sensor harness was replaced and clearance was made and problem seems to be solved.
Senior Member
Joined: 11-05-2010
Posts: 1,492
From: Detroit, Michigan USA
Hotrodbob,
We're sorry that this has been such an arduous process to get your HHR diagnosed and repaired with your dealership. Keep us posted on what you find out today and if we can follow up with the dealership for you we're available. Send us a private message with more information (including your name and contact information and the last 8 digits of your VIN, as well as a brief recap for Michelle when she's in).
Sarah (Assisting Michelle), Chevrolet Customer Service
We're sorry that this has been such an arduous process to get your HHR diagnosed and repaired with your dealership. Keep us posted on what you find out today and if we can follow up with the dealership for you we're available. Send us a private message with more information (including your name and contact information and the last 8 digits of your VIN, as well as a brief recap for Michelle when she's in).
Sarah (Assisting Michelle), Chevrolet Customer Service
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