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Eric, Automotive Repair Shop Manager
Category: GM
Satisfied Customers: 32386
Experience:  20+ yrs. experience as repair shop manager and technician.
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gmc: 400 dies and is sluggish i hooked it into the maf to the tan

Resolved Question:

I installed a tunesport performance chip in my 03 gmc sle 5.3 now my idle drops down below 400 dies and is sluggish i hooked it into the maf to the tan and solid black wire did i do it wrong
Submitted: 5 years ago.
Category: GM
Expert:  Eric replied 5 years ago.

You have them on the correct wires. But I will tell you what I tell all my other customers, performance chips are a waste of money and time. I have a huge box filled with these "performance chips" that I have removed from customers cars that have damaged either their MAF/IAT sensor or PCM(powertrain control module) . I have also seen them melt the engine pistons due to leaning the engine out too much.They are snake oil, plain and simple, and dont work. They have been proven time and again by Consumer Reports, Car and Track, MythBusters and others to actually decrease fuel mileage, decrease performance and damage components. the only thing inside that chip is a 25 cent resistor that you could buy at radio shack. That is it. If they worked, every car manufacturer would have added them years ago to met Federal Requirements on gas mileage ratings instead of sinking billions into research.

I understand that this is not what you want to hear, but the best thing you can do is remove it, and try to get your money back and hope you have not damaged the Maf sensor at this point

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