Stopped up injectors
Stopped up injectors I've got a ls2 that's sat for nearly 5 years and until recently did I realize that it still had gas in the fuel rail. Obviously it was very stale. What's the chance that all 8 injectors are gummed up to the point it won't begin to try and fire? I did check for spark and all injector plugs have fire according to a noid light. Tomorrow I'm going to check and make sure that it's actually pumping fuel and check the pressure at the rail. I can't get to involved at the moment as I've got a work project coming up. I would love to hear this thing act like it wants to fire up.
I just finished cleaning and flow testing a set of injs, that had been sitting for??
2 of the 8 were locked up. All 8 had rotten, stinkin gas in them.
I ran them thru the ultrasonic cleaner, for 4- 20 min cycles. The cleaner was heated to 110*.
Worked perfectly. All 8 are "dead-on" for flow and pattern.
I suggest you not try to start the engine until you have dumped the rotten fuel. You may be able to use some Seafoam, and a 9V batt to see if they are locked up.
Real way to do it, is to have them cleaned and flow tested, all new wear items installed.
2 of the 8 were locked up. All 8 had rotten, stinkin gas in them.
I ran them thru the ultrasonic cleaner, for 4- 20 min cycles. The cleaner was heated to 110*.
Worked perfectly. All 8 are "dead-on" for flow and pattern.
I suggest you not try to start the engine until you have dumped the rotten fuel. You may be able to use some Seafoam, and a 9V batt to see if they are locked up.
Real way to do it, is to have them cleaned and flow tested, all new wear items installed.
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Joined: Jun 2011
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They likely could be sticky, but otherwise they should be okay. Just have to get them loose.
Turn them upside down and give them a vigorous shake. Pre-fill each with fuel, install in the fuel rail and hook up the injectors to the wire harness. Instead of installing into the intake, put the assembly on top of a pan (or cookie sheet - but don't use it to cook after
). Put sheets of paper between the pan the injector tips. With the fuel pump off (so it doesn't build pressure), let the engine crank for a few seconds. Check for wetting on the paper under each injector.
Turn them upside down and give them a vigorous shake. Pre-fill each with fuel, install in the fuel rail and hook up the injectors to the wire harness. Instead of installing into the intake, put the assembly on top of a pan (or cookie sheet - but don't use it to cook after
). Put sheets of paper between the pan the injector tips. With the fuel pump off (so it doesn't build pressure), let the engine crank for a few seconds. Check for wetting on the paper under each injector. 
TECH Regular
Joined: Dec 2011
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I just went through this last year. I wanted to swap my TBSS LS2 manifold and injectors onto my LQ4. Had been sitting for 5 years. There was still a lot of gas in the rail, nasty varnish smelling.
I used a 9v to check them, 4 were stuck. I never tried to unstick them, as I had a 2nd set of LS2 injectors already in the truck. It just would have made my life easier if those had worked.
I used a 9v to check them, 4 were stuck. I never tried to unstick them, as I had a 2nd set of LS2 injectors already in the truck. It just would have made my life easier if those had worked.
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