Spectrum 3.0L GM

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Checks Action

Engine Mechanical

Checks

Important: The LPG Fuel system is more sensitive to intake manifold lea-

kage than the gasoline fuel supply system.

Check for the following:

 Engine vacuum leaks

 Manifold vacuum leaks.

 Venturi Vacuum Leaks

 Improper valve timing-how?

 Low compression

 Improper valve clearance.

 Worn rocker arms

 Broken or weak valve springs

 Worn camshaft lobes.

Exhaust System Checks

Check the exhaust system for a possible restriction:

 Inspect the exhaust system for damaged or collapsed pipes.

 Inspect the muffler for signs of heat distress or for possible internal fail-

ure.

Check for possible plugged catalytic converter. Refer to Restricted Exhaust

System Diagnosis.

Spectrum 3.0L GM - Page 41