Engine - Fuel Starvation in High Ambient Temperatures

Number 83-T-77 Section 6 Date 6/84

Subject: FUEL STARVATION ON 2.8L V-6 ENGINES - 1982-83 6000 AND PHOENIX


Some 6000's and Phoenix with the 2.8L V-6 engines may experience fuel starvation during high ambient temperatures (above 80~F). This condition usually occurs when an attempt is made to restart a vehicle following a 15/20 minute hot soak, or an extended engine idle.

The condition is aggravated by winter grade fuel, high ambient temperatures, a hot vehicle, an extended engine idle time, or a fuel pump with low operating pressure.
To alleviate this condition, the following procedure should be followed:

1982 6000 and Phoenix

1. Perform an on car fuel pump test as outlined in the 1982 shop manual (both vacuum and pressure checks should be made with vehicle at operating temperature).

2. If a pump indicates low in either the vacuum or pressure check, then it should be replaced. (Follow replacement procedure outlined in shop manual).

Restriction Location:

VAPOR RETURN RESTRICTION MATERIAL:BRASS DIMENSIONS ARE INCHES:

3. If the fuel pump tests to specifications, (refer to illustration B) then fabricate a 1.0 mm restrictor from brass and install it in the return line as shown in illustration A.

NOTE: Use only the 1.0 mm restrictor on 1982 model year vehicles.