YukonGTmaster
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- Joined
- Mar 18, 2021
- Posts
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hank89, I went with the new MPFI Spider off EBay, sold by motorman. There was a noticeable increase in throttle response. I ran with my OBD scanner plugged in and averaged 14 MPG
As for intake, I could not find any new stock intakes for an L31. The marine intake has external fuel rails, so it is a completely different animal. I have posted the link below of my adventures while doing my Spider and lower intake manifold gasket.
www.tahoeyukonforum.com
I purchased my 97 Yukon GT new, and started running green coolant after year 3. I have 270k Miles on my engine.
Good Luck!
Motor Man MFI Spider Injector for GM Vortec with plenum gasket kit 5.0L 5.7L V8 | eBay
Find many great new & used options and get the best deals for Motor Man MFI Spider Injector for GM Vortec with plenum gasket kit 5.0L 5.7L V8 at the best online prices at eBay! Free shipping for many products!
www.ebay.ca
As for intake, I could not find any new stock intakes for an L31. The marine intake has external fuel rails, so it is a completely different animal. I have posted the link below of my adventures while doing my Spider and lower intake manifold gasket.
5.7L Vortec Problems
I was having a rough idle, and the Amber engine light would flash (Random misfire) when I started up in the morning. I would cycle the key off for ten seconds, the light would go out and I would drive to work. It was not latching any codes. I had a bad coolant leak as well. Then I started to...
www.tahoeyukonforum.com
I purchased my 97 Yukon GT new, and started running green coolant after year 3. I have 270k Miles on my engine.
Good Luck!
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