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The way they do this is during a deceleration of the vehicle when there is low absolute pressure in the intake manifold (i.e., a high vacuum present in the intake manifold relative to the outside air) the powertrain control module (PCM) will open the EGR valve and then monitor the MAP sensor's values. If the EGR is functioning properly, the ...
Indications of low oil pressure may be that the warning light is on, a low pressure reading on the gauge, or clattering/clinking noises from the engine. Low oil pressure is a problem that must be addressed immediately to prevent serious damage. The leading cause of low oil pressure in an engine is wear on the engine's vital parts.
Rather than allow a "high-strung" small-block to fail the heavy-duty truck market, the iron block, lack of both stop-start and cylinder deactivation, longer stroke and rod ratio, lower compression, lesser 87 Octane requirement, greater displacement, forged connecting rods, and forged crankshaft with central counterweights all suggest that the ...
Adding intake manifold boost pressure from a supercharger or turbocharger can increase the VE, but the final calculation for cylinder airmass takes most of this benefit into account with the pressure term in n=PV/RT which is taken from the intake manifold pressure. Many high performance cars use carefully arranged air intakes and tuned exhaust ...
The 305 is sometimes dismissed in performance circles because of its lackluster performance, small bore size, and difficulty flowing large volumes of air at high rpm. However, two variants of the 1983 to 1992 305 were notable performers: the 1983–1988 L69 High Output 5.0L (only used in late 1983–early 1986 F-body and late 1983–1988 Monte ...
Despite having the dimension of pressure, MEP cannot be measured. [2] When quoted as an indicated mean effective pressure (IMEP), it may be thought of as the average pressure acting on a piston during the different portions of its cycle. When friction losses are subtracted from the IMEP, the result is the brake mean effective pressure (BMEP).
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The spray valves open or close as the fuel flow changes, holding a constant fuel delivery pressure. An accelerator pump is either remotely mounted or mounted on the carburetor body. The accelerator pump is either mechanically connected to the throttle, or it is operated by sensing the manifold pressure change when the throttle is opened.