Labeled 1993 5.8L engine bay photo showing FPR, ignition coil, E…

V8 Vacuum lines (same as 5.0L)

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A common problem is for the FPR diaphragm to fail, allowing hi-pressure fuel to leak into the red vacuum line, which dumps straight into the intake plenum. This can flood the engine, and if allowed to continue, it can wash the rings out & damage the bearings.
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Some are harder to change than others due to the tiny fasteners facing down.

To find the vacuum map (VECI label) specific to your engine, read this caption:


The most common problem with the TAB & TAD is for the 'coffee can' vacuum reservoir on the R wheelwell to rust/crack, venting the vacuum required to operate the TAB & TAD air valves. The best fix is to replace the coffee can with the later plastic reservoir, using a hair dryer to bend the lines to fit.


The most common problem with the EVR is for its vacuum line to crack. Simply slip rubber vacuum line over the break.

Static Resistance Values:
TAB/TAD: 50-100 ohms
EVR: 30-70 ohms
Injector: 11-18 ohms
Coil: 0.3-1.0 ohms between primary terminals
Coil: 8-11.5 Kohms between output & either primary
Coil: >12Kohms beteen any terminal & E-core

Injectors:
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For more info, read this article about Emissions Systems.

Owner caption July 2003 · Photo 99 of 5000