Finding vacuum leaks
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***PCV hose, valve or grommet | ***PCV hose, valve or grommet | ||
| − | == | + | ==Finding a vacuum leak== |
There are several methods for locating vacuum leaks. If you suspect a vacuum leak on a carbureted or TBI engine, you may be able to verify your suspicion by performing a simple check. With the air cleaner removed and the engine at idle speed, use the choke blade to ''partially'' block the airflow into the engine. Or you can place a wadded-up rag ''lightly'' over the throttle body throat to partially choke off the air supply. If this artificial richening of the air/fuel mixture causes the engine rpm to increase, you may well have a vacuum leak. | There are several methods for locating vacuum leaks. If you suspect a vacuum leak on a carbureted or TBI engine, you may be able to verify your suspicion by performing a simple check. With the air cleaner removed and the engine at idle speed, use the choke blade to ''partially'' block the airflow into the engine. Or you can place a wadded-up rag ''lightly'' over the throttle body throat to partially choke off the air supply. If this artificial richening of the air/fuel mixture causes the engine rpm to increase, you may well have a vacuum leak. | ||
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{{Warning}}Stay away from any moving parts like the belts and fan blade. the fan or fan belts. | {{Warning}}Stay away from any moving parts like the belts and fan blade. the fan or fan belts. | ||
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| + | {{Warning}}NEVER use a long screwdriver or other stiff object to locate engine sounds! This type of thing could kill a person if it was jammed into the head. | ||
==ATF method== | ==ATF method== | ||
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