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Tune up ? Mileage went south.

This is a discussion on Tune up ? Mileage went south. within the General Help forums, part of the LSx Technical Help Section category; Can someone tell me. What is involved to tune my 01 Ls1? I was getting about 200+ miles before refueling.(13 ...

  1. #1
    Junior Member Rick in Yuma's Avatar
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    Tune up ? Mileage went south.

    Can someone tell me. What is involved to tune my 01 Ls1? I was getting about 200+ miles before refueling.(13 Gallons) Today it was 133 miles for the same amount of fuel. Car has 45k miles. Installed a slp lid and opened up the mass Air flow sensor when new, (don't remember the brand) mileage was fine. Still drive it like I did before, like I stole it:-) I'm not worried about fuel cost. But I think the performance has dropped also. What do I look for besides plug change.

    Thanks in advance.
    Rick
    BTW
    29mpg Yuma to Phx and Back. Cruise set at 80 sixth gear.... Have not driven it to Phx since I bought the 760li in July.

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    old timer blue02Z's Avatar
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    fuel filter, air filter, maybe clean your injectors... think about your tranny, engine, and rear end oil as well

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    old timer blue02Z's Avatar
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    also clean your throttle body

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    Junior Member Rick in Yuma's Avatar
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    oils&filters Ok. Will clean injectors and T-body.

    Rick

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    Quote Originally Posted by Rick in Yuma View Post
    Can someone tell me. What is involved to tune my 01 Ls1? I was getting about 200+ miles before refueling.(13 Gallons) Today it was 133 miles for the same amount of fuel. Car has 45k miles. Installed a slp lid and opened up the mass Air flow sensor when new, (don't remember the brand) mileage was fine. Still drive it like I did before, like I stole it:-) I'm not worried about fuel cost. But I think the performance has dropped also. What do I look for besides plug change.

    Thanks in advance.
    Rick
    BTW
    29mpg Yuma to Phx and Back. Cruise set at 80 sixth gear.... Have not driven it to Phx since I bought the 760li in July.
    Your straight has cruise control?

  6. #6
    Junior Member Rick in Yuma's Avatar
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    Quote Originally Posted by xinthenight View Post
    Your straight has cruise control?
    Came from factory with it. Every option except traction control. Why pay for somthing my Brain does for free. Plus only get 3 inches of rain a year. No snow.

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    Quote Originally Posted by Rick in Yuma View Post
    Came from factory with it. Every option except traction control. Why pay for somthing my Brain does for free. Plus only get 3 inches of rain a year. No snow.
    That is weird, I had no idea you even could do that. Does anyone/websites sell any kits for cruise control to put into my m6?

  8. #8
    Junior Member Rick in Yuma's Avatar
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    Quote Originally Posted by xinthenight View Post
    That is weird, I had no idea you even could do that. Does anyone/websites sell any kits for cruise control to put into my m6?
    Call any good garage or stereo installer. They can get "aftermarket" cruise control. Even for M trans. Or google it.

  9. #9
    Member L3THAL_Z28's Avatar
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    Mine came with cruise control...its a M6...all options except for traction control and leather...cruise control is great

  10. #10
    old timer blue02Z's Avatar
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    i think all ls1's had cruise factory. summit sales a cruise control kit

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