Map help
New guy here with a problem with my Maggie install. It's a TVS1900 on a 5.3 that resides in an 86 Chevy PU. With the Magnuson tune it runs great as long as I use the map sensor that came in the 5.3 (ie 1 bar). I have tried 3 different 2 bar map sensors (GM no. 12615136) and it will start and idle but if you feed it throttle it dies. Anybody run into this before or know of a different part no that might work. TIA:sigh:
Don |
My maggie came with a 3bar
RT |
Originally Posted by 07Softail
(Post 5392581)
My maggie came with a 3bar
RT Thanks, Don |
I'd bet that the tune they sent you is made ONLY to run a stock 1 bar MAP sensor. The second you install a 2 bar map it's going to be wrong. The linear and offset settings must be changed in the tune to run a 2-3 bar MAP sensor.
That's just my guess but I'd have to see the their tune file to see how they set it up. |
Originally Posted by FFDP
(Post 5392588)
I'd bet that the tune they sent you is made ONLY to run a stock 1 bar MAP sensor. The second you install a 2 bar map it's going to be wrong. The linear and offset settings must be changed in the tune to run a 2-3 bar MAP sensor.
That's just my guess but I'd have to see the their tune file to see how they set it up. Thanks, Don |
Or go back to a 1 Bar. My 3 Bar is a GM so i'm guessing its the same one on the LT4
|
Originally Posted by 07Softail
(Post 5392594)
Or go back to a 1 Bar. My 3 Bar is a GM so i'm guessing its the same one on the LT4
Thanks, Don |
To tune it right, yes you need a 2 bar map or 3 bar map to properly tune the VE or VVE for boost.
|
I run a Duramax map. Works great
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Not saying they haven't worked but I've many tunes where people try to use the duramax 3.3 bar map sensor and it's nothing but problems. Mainly because of the settings required for the computer and how the duramax differs from a gas engine.
Cobalt map sensor or LSA/covette map or similar that is just a standard 3 bar map is the best options. |
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