Catalog #3562, 3563, 3564, 3565
Rev. 3/06
Page 16 of 16
©2006 Edelbrock Corporation
Brochure #63-0047
Edelbrock Corporation • 2700 California St. • Torrance, CA 90503
EFI Tech-Line: (800) 416-8628, Option 3 • E-Mail: [email protected]
®
BASIC TROUBLESHOOTING
1.
Engine Combinations
a.
If you assemble a combination of parts other than stock or the Edelbrock MPFI package called out in our catalog, your vehicle may not
perform properly.
b.
Stroker motors are not supported.
c.
All engine assemblies must maintain stock compression ratios.
d.
A 190- to 195-degree thermostat should be used for optimum mileage, performance and emissions. Thermostats temperatures below
185 degrees should be avoided.
2.
Engine Assemblies
a.
Heavy duty L19-454, 1987-1990 P/N 88890529
b.
Heavy duty L19-454, 1991-1995 P/N 88890530
c.
GM P/N 12371054 Retrofit 8.2L (502) Long Block (3564, 3565 MPFI)
3.
Fuel Pressure
Fuel pressure must be checked with a fuel pressure gauge only. Do not use a tire pressure gauge.
Test:
a.
Turn key to “On” position, but
do not start the engine.
b.
Fuel pressure should read 42-45 psi depending on your altitude . The higher the altitude the lower the pressure.
c.
The system’s fuel pressure should not drop more than 10 psi in 5 minutes, and should maintain residual pressure even after sitting for
24 hours. If pressure drops more than 10 psi, check fuel pump hose and clamps in fuel tank. If the original hose and clamp were used,
replace them with the supplied hose and clamps per the instruction. If fuel pressure still drops off too quickly, contact Edelbrock.
d.
With engine running, check fuel pressure. The idle fuel pressure should be between 34-38 psi depending on idle vacuum.
4.
Engine Runs On Only One Bank
a.
Check injector wiring for correct connections, green to green, blue to blue or red to red (some cases white to red).
b.
Check that your original MemCal (blue capped chip) is installed on the supplied green piggyback adapter and chip alignment in the green
piggyback adapter.
See “New Computer Chip Installation” section and diagram on page 15.
