Question about 1990 Chevrolet Lumina

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Chevy 1990 3.1 6 cylinder EVAP leak

3.1 6 cylinder

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  1. Location
    • The fuel filter is under the vehicle on the driver's side of the car, in the area below the seating area. In front of the fuel tank, the fuel filter is positioned on the chassis of the fuel line.
    Identification
    • The fuel filter looks like either a polypropylene film canister or a small spool of thread with a thin tube attached at each end. The vehicle component is relatively small in size and is commonly found in a black or silver color.
    Purpose
    • When gasoline transfers from a gas station's fuel tank to the vehicle's gas tank, dirt and water is transferred with the gasoline as well. Dirt can be transferred from dirty tank sprouts, dirty fuel caps or the dispensing funnels, and water can travel through wet dispensing funnels. When this happens, if unprotected, the contaminants clogs the fuel lines, which destroys the engine, with water causing deterioration and rust. To prevent these and other contaminants from reaching the fuel lines, the fuel filter works as a net to screen out dirt and rust particles, allowing only pure gasoline to fuel the Lumina's engine.
    Warnings/Considerations
    • A fuel filter does not clean itself. Over time, the contaminants will build up within the filter which can cause a barrier from any fuel from reaching the engine. When this happens, remove and clean the fuel filter with a dry wash cloth or issue a replacement as necessary.

Posted on Jan 15, 2013

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Posted on Jan 02, 2017

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Air leak in the intake manifold, or in the EGR or EVAP system Base engine mechanical fault that affects two or more cylinders Erratic or interrupted CKP or CMP Sensor signals Fuel delivery component fault that affects two or more cylinders (i.e., a contaminated, dirty or sticking fuel injector)


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350 Chevy engine in what? 1990 Corvette? Who built it, did you?

Sounds as though you have plug wires wrong.
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Find Number 1 tower on distributor cap, go Clockwise with Firing Order.

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VIEWING the engine from the Front of the car.

Spark plug wire connections along the back, starting from Left side going to Right side;
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Spark plug wire connection towards the Front of the engine;
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(To guess I would say you have 5 and 7 wires switched)

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Drivers side is Left side.
Right side cylinder order is 2-4-6-8, going from front to back.

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