C7 dies while driving
Thread Starter
Instructor
Joined: Jan 2008
Posts: 129
Likes: 1
From: Utica NY
small update to this just incase im onto to something. i now have 225 miles on the new engine without a problem. i did 2 things and im not sure what did it. 1. i replaced the MAP sensor. i also noticed it wont start if MAP is unplugged. 2. I zeroed out the VVT cam and VCT timing in HP tuners since i was getting a light throttle hesitation and noise. at this point ill keep putting on some miles and see what happens. can VVT cause this? how come car wont start with MAP disconnected?
Heel & Toe
Joined: Apr 2019
Posts: 17
Likes: 1
From: DFW, Texas
small update to this just incase im onto to something. i now have 225 miles on the new engine without a problem. i did 2 things and im not sure what did it. 1. i replaced the MAP sensor. i also noticed it wont start if MAP is unplugged. 2. I zeroed out the VVT cam and VCT timing in HP tuners since i was getting a light throttle hesitation and noise. at this point ill keep putting on some miles and see what happens. can VVT cause this? how come car wont start with MAP disconnected?
Last edited by Wyatttttttt; Jun 29, 2025 at 07:56 PM.
Thread Starter
Instructor
Joined: Jan 2008
Posts: 129
Likes: 1
From: Utica NY
I must have been the map sensor for me. It never happens again to once I changed it. It never set a light or anything. I always had spark and fuel pressure when this would happen. Since changing the sensor I have about 2000 on it and no problems with dying out. I’m getting to to change my lifters now to get rid of the sewing machine noise.
Heel & Toe
Joined: Apr 2019
Posts: 17
Likes: 1
From: DFW, Texas
I must have been the map sensor for me. It never happens again to once I changed it. It never set a light or anything. I always had spark and fuel pressure when this would happen. Since changing the sensor I have about 2000 on it and no problems with dying out. I’m getting to to change my lifters now to get rid of the sewing machine noise.
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Heel & Toe
Joined: Apr 2019
Posts: 17
Likes: 1
From: DFW, Texas