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