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EFI – Cold start injector time switch

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PURPOSE
The cold start injector time switch and a cold start injector both have one thing in common.  They are designed to operate when the engine is cold.  The cold start time switch is a timer designed to turn the cold start injector on to enrich the fuel mixture for an easy start.

THINGS TO LOOK FOR
The cold start injector time switch and a cold start injector enrichment program may decide to malfunction and not operate at all or it continues to run rich when the engine is warm.  Either way, hard to start or the engine cutting out when it is cold could be an indicator that the program is not operating correctly.  Any engine cutting out when it is cold is a problem and needs to be attended to ASAP.

IS IT EXPENSIVE TO REPAIR?
It is difficult to estimate how much it will cost depending on where the problem is but it does require the attention of a specialised auto electrician.

TEMPORARY REPAIR AND LONG TERM REPLACEMENT
If the cold start injector is causing a problem by cutting out and is very difficult to start, try holding the throttle a third of the way and don’t pump it but crank the motor.  Once you start it, get it warm before you drive off.  This is a short term remedy only.

This article is found in the Virtual mechanic CD Rom
You can download it for the price of a latte, but you will learn not to buy a lemon
By Darren Gow-Brown, Melbourne Australia ©2009

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