LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Two Codes Thrown

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Old Aug 30, 2003 | 03:16 PM
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TobyZ28's Avatar
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Two Codes Thrown

Hooked up a scanner and ran it in road test mode.. it came up with a Code 55 and 22 (i think). One was Lean mixture and the other was TPS too low. What could be causing these two codes? i'm guessing i should replace my TPS?
Old Aug 30, 2003 | 05:25 PM
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TTT - Gosh this forums busy these days
Let me give some more info:
22 - TPS Circuit Low Voltage
55 - Fuel Lean Monitor

From what I've figured out, the TPS just needs replacing.
The 55 code though isn't going to be easy. How do i check the fuel system? This is what the haynes manual says for code 55 troubleshooting...
"Engine running lean during power acceleration indicating a possible fuel pump failure, fuel line restriction, etc."
I have a "hunch" that its my fuel pump about to go, would this have anything to do with my starts being harder lately? (2-3 seconds to crank engine)... How can i check the fuel pressure.. thanks!
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