Go Back   Chevrolet Forum - Chevy Enthusiasts Forums > Current Chevy Trucks, SUV's, Crossovers & Vans > Silverado & Fullsize Pick-ups
Sign in using an external account
Register Forgot Password?

Silverado & Fullsize Pick-ups The Silverado has been one of the best selling trucks in the US for decades, and is truly proven to be "like a rock".

2014 Chevy Silverado
Platform: Truck, GMT 400, 800, & 900
Sponsored by: Bakliner

LinkBack Thread Tools
Old 09-29-2006, 01:33 PM
Join Date: Aug 2006
Posts: 5
Default TB coolant bypass

I want to do a throttle body coolant bypass on my 04 silverado, I know its cheap, easy to do and make extra power, but will it affect my fuel mileage. A mechanic said that there is a sensor in the TB that reads temp, if the sensor reads a cool temp the computer will pick the info up and make it will run richer. Is there any truth behind this? Any suggestions?
Register today for free or log-in if already registered to remove this ad!
Reply With Quote
Old 09-29-2006, 03:28 PM
Join Date: Sep 2006
Posts: 9
Default RE: TB coolant bypass

To my knowledge the only temperature sensor that the computer reads comes from the MAF sensor. This temperature drop across the element in the MAF sensor is a linear equation that basically equates air flow and density, which gives input to fuel for the proper mixture. The theory being that with colder denser air you dont need as much fuel to get the same amount of HP. That being said, what the mechanic states is exactly the opposite of what really happens. I have thought about doing this mod myself, because in warmer climates of the south there is no need to heat the air before detonation. The reason Chevy has this coolant tube through the throttle body is because they have to design a fuel system that operates in a wide range of operating conditions, from Alaska to Florida and all parts in between. Im no mechanic, but I would think there would be no problem in doing this mod. Please anyone correct me if Im wrong, because as I said, I too am considering doing this mod.
2004 Chevy Silverado Crew Cab 4x4 5.3L
K&N Series 77 FIPK
Airaid Poweraid Throttlebody Spacer
Granatelli MAF Sensor
Gibson Duel Sport Exhaust
MSD 8.5mm wires
Hypertech Power Programmer III
Reply With Quote
Old 09-30-2006, 09:35 PM
Join Date: Sep 2006
Posts: 4
Default RE: TB coolant bypass

actual I have to agree with the mechanic..Cold Air - is more dense and contains more oxygen, therefore requires a richer mixture to achieve the proper air-fuel mixture. I don't Know about your vehicle but many have Intake Air Temperature (IAT) sensors to provide the PCM temperature of the air entering the engine.
Reply With Quote
Old 10-02-2006, 07:23 PM
Join Date: Aug 2006
Posts: 2,424
Default RE: TB coolant bypass

There is no temp sensor in the Throttel Body.
The coolant is piped thru the TB to help the engine come up to operating temp faster to reduce emissions.
The effect that the heated coolant (and subsequent heat exchange with the incoming air) has on the performance of the engine once up to operating temperature is negligible, but the cooler the air the denser the air/fuel charge and the more power potential.
The electronic engine controls work to keep the same air/fuel ratio regardless of temperature and bypassing the TB will have no effect on economy or anything else for that matter.
Reply With Quote
Old 10-02-2006, 07:23 PM

53, 99, avalanche, body, bypass, cavalier, celebrity, chevrolet, chevy, coolant, malibu, sensor, silverado, tb, throttle, tube

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

Join Chevroletforum
Featured Sponsors
Vendor Directory
Our Sponsors
All times are GMT -5. The time now is 12:30 PM.

Internet Brands, Inc.

Emails Backup