What's the deal with so many defective cold start injectors, on my third replacement?

my mechanic says his parts supplier said there is a defect in many of the injectors (i forget the brand)...

Any suggestions for quality manufacturer or part supplier OR advice on defect issue solutions, or "renovating" my used ones?

thanks very much! Will

 

Although this is the first I've heard of this particular issue some "brand-x" aftermarket replacement parts are junky, yes.

If you get Lucas or Bosch you should be Ok.....although I guess a "bad run" of parts can crop up from time to time even with well known name brands

What exactly is the nature of the failures? Leaking? Electrically inoperative? Mechanically inoperative? Perhaps there's another problem with the system that is causing the failure. Or perhaps the injectors are not bad at all but the problem isn't being correctly diagnosed?

Cheers
DD

 

DOUG, thank you. i'll ask him what the issue is, i suspect it is clogging up like the others... maybe i can find a bosch or lucas online somewhere...???

cheers
will

 

If they're actually clogging then it doesn't matter what brand they are. Clogging assumes fuel contamination, and contamination in the fuel doesn't recognize brand names!

Cheers
DD

 

The cold start injector pumps so much fuel in it's almost like turning on a cold water tap; the fuel orifice is huge compared to the running injectors, so I am puzzled this injector alone can get clogged up. Is it getting turned on correctly ?

 

I had a quick look on a UK website.

The cold start injector is turned on for 12 seconds by the Thermo-time switch, plus it is only turned on when the engine is being cranked by the starter. Once the driver releases the ignition switch on engine firing it is turned off. So even if you crank and crank, the maximum is 12 seconds, and one can understand why as the injector has no timing, it just squirts and squirts

Sorry if you knew this already !

 

Is it just one injector that keeps going bad, or the whole set?