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940 L4-2.3L SOHC VIN 88 B230F (1992)

Relays and Modules > Relays and Modules - Powertrain Management > Relays and Modules - Computers and Control Systems > Engine Control Module > Component Information > Technical Service Bulletins > All Technical Service Bulletins for Engine Control Module: > 28113 > Aug > 93 > Engine Controls - Stalls, Hesitation, Poor Driveability

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Engine Control Module: All Technical Service Bulletins
Engine Controls - Stalls, Hesitation, Poor Driveability

Model:
700-900

Group:
28

Number:
113

Title:
MFI Regina Control Module Replacement For Cold Start Symptoms 1989-1993 Regina/Rex B230F W/Auto. Trans.

Market:
Us and Canada

Date: August 1993

This Bulletin Supersedes SB 28-113; Dated July 1993.

Reference:
TP 31903/1 (English); 9/91/ Fuel System Regina Ignition
System REX-I
SB 25-202/704; 5/91
SB 28-710; 8/92
SB 28-205/906; 3/93
SMB 23-26; 8/92

Multi-port fuel injection (MFI) Regina control module replacement for cold start symptoms with low volatility fuel.

BACKGROUND:
Some of the low volatility fuels (also known as low RVP fuels) now used during the May- September time period suffer from decreased mid-range
volatility. This decreased mid-range volatility can result in the need for repeated cold start attempts in ambient temperatures ranging from 60-85°F
(16-27°C).

SYMPTOMS:

- The engine starts OK, but stalls almost immediately, requiring a restart attempt.
- A drop in idle RPM or stall when A/C compressor and electric cooling fan engages.
- Take-off hesitation immediately after a cold start.
- The condition began in May, and only occurs within the first 30-40 seconds after a cold start on a cold engine, not on a warm engine.

DIAGNOSTIC PROCEDURES:

Relays and Modules > Relays and Modules - Powertrain Management > Relays and Modules - Computers and Control Systems > Engine Control Module > Component Information > Technical Service Bulletins > All Technical Service Bulletins for Engine Control Module: > 28113 > Aug > 93 > Engine Controls - Stalls, Hesitation, Poor Driveability

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