940 L4-2.3L SOHC VIN 88 B230F (1992)
Engine Control Module: Customer Interest
Engine Controls - Stalls, Hesitation, Poor Driveability
MFI Regina Control Module Replacement For Cold Start Symptoms 1989-1993 Regina/Rex B230F W/Auto. Trans.
Us and Canada
Date: August 1993
This Bulletin Supersedes SB 28-113; Dated July 1993.
TP 31903/1 (English); 9/91/ Fuel System Regina Ignition
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.
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
- 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.