LS-7 part throttle tune now wonky...something mechanical??
Thread Starter
Melting Slicks
Joined: Jun 2002
Posts: 2,152
Likes: 243
From: Northern VA
LS-7 part throttle tune now wonky...something mechanical??
Ok, so after fighting idling/part throttle issues with my LS-7, I found a tuner that pretty much figured it out. The car was running great. With as much power as I'm making, if I'm cruising in 6th @ 65 mph, the vette just steady takes off. Now all of a sudden, it just sort of goes flat when I press the throttle in the same condition. It goes flat, then picks up for a second, goes flat then takes off. The exhaust note has changed and it almost "moans".
No codes other than MAF but it's on an SD tune. I checked all plugs and wires and all is well.
Some conditions that seem to be different:
Increased exhaust smell in cabin under acceleration
Lazy throttle response in general
Could an exhaust leak ahead of the O2's cause this condition? Unfortunately I have no way of data logging the condition.
No codes other than MAF but it's on an SD tune. I checked all plugs and wires and all is well.
Some conditions that seem to be different:
Increased exhaust smell in cabin under acceleration
Lazy throttle response in general
Could an exhaust leak ahead of the O2's cause this condition? Unfortunately I have no way of data logging the condition.
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Joined: Dec 2010
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2020 Corvette of the Year Finalist (performance mods)
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is the weather much cooler than what it was when the car was originally tuned?... you might just need to have it touched up a bit to compensate, in my experience it's best to get tuned in cooler weather
Thread Starter
Melting Slicks
Joined: Jun 2002
Posts: 2,152
Likes: 243
From: Northern VA
The weather is almost exactly the same so I don't think that's it. It has to be something mechanical that changed so I'm going to get her up on jack stands and see if I can see something. I did notice that I felt exhaust on my feet under the passenger door. You'd figure I'd hear something out of the ordinary if it was an exhaust leak.
