Spark no fuel ,pump cycles though
Thread Starter
Teching In
Joined: Apr 2014
Posts: 47
Likes: 5
From: Valley Center
Spark no fuel ,pump cycles though Just put the package together 5.3 ,T5, 2006 stock truck harness and ECM, ,HP tuners eliminated the VATS made some other basic changes (complete rewrite),verified all the ground pins have continuity to the block ,pump cycles have fuel into the rails it starts if I spray carb cleaner into the intake... also have a spare ECM with that installed same problem being it still had VATs figure it would at least start and stall .. Any Ideas what Im missing ,,much thanks!!
Thread Starter
Teching In
Joined: Apr 2014
Posts: 47
Likes: 5
From: Valley Center
Thanks Il check the fuel pressure today , I need to get a noid tester will pick that up today to and report back... ((( EDIT ((I did do an injector flush during the process they had a good pattern ,,sorry realized got this confused with my other LS truck so i never did flush these)
Last edited by jim caf; Sep 9, 2021 at 02:56 PM.
Thread Starter
Teching In
Joined: Apr 2014
Posts: 47
Likes: 5
From: Valley Center
Well I checked the fuel pressure came n at about 58,,I have a constant 12 volts on the pinks at the injectors with key on ,,,,just did a quick check (test lamp technic) got a flicker there on the neg ecm side of injector,, pulled the injectors put 13 volts to them and hear nothing , spray filled them with carb cleaner and not even a dribble..I think I have all 8 stuck injectors??
TECH Fanatic
Joined: Jan 2009
Posts: 1,065
Likes: 476
From: Bostwick, GA.
Well I checked the fuel pressure came n at about 58,,I have a constant 12 volts on the pinks at the injectors with key on ,,,,just did a quick check (test lamp technic) got a flicker there on the neg ecm side of injector,, pulled the injectors put 13 volts to them and hear nothing , spray filled them with carb cleaner and not even a dribble..I think I have all 8 stuck injectors??
I see that frequently when I clean injs out of junkyard engines.
Thread Starter
Teching In
Joined: Apr 2014
Posts: 47
Likes: 5
From: Valley Center
I soaked them a while in a mixture of atf and acetone and pulled them sprayed them down with carb cleaner ,taped on the metal base lightly Im hearing slight click not a loud as an old bosch one off an old 5 liter mustang I had around ,,anyway flushed out the rails and got the injectors back in the rails going to try the pressurized injector tool and power up each injector and see what iv got ,,
What's your Technique for freeing them up
What's your Technique for freeing them up
TECH Fanatic
Joined: Jan 2009
Posts: 1,065
Likes: 476
From: Bostwick, GA.
I have an inj cleaning test bench.
I pull the filter baskets, and try to see if they will operate. If not, a solid rap w/ a screw driver handle.
I also put them in the ultrasonic bath, heat it, and run them.
Some can be soaked, then hit with air, from the nozzle end while powered up.
It's hit miss.
I pull the filter baskets, and try to see if they will operate. If not, a solid rap w/ a screw driver handle.
I also put them in the ultrasonic bath, heat it, and run them.
Some can be soaked, then hit with air, from the nozzle end while powered up.
It's hit miss.
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Thread Starter
Teching In
Joined: Apr 2014
Posts: 47
Likes: 5
From: Valley Center
I have an inj cleaning test bench.
I pull the filter baskets, and try to see if they will operate. If not, a solid rap w/ a screw driver handle.
I also put them in the ultrasonic bath, heat it, and run them.
Some can be soaked, then hit with air, from the nozzle end while powered up.
It's hit miss.
I pull the filter baskets, and try to see if they will operate. If not, a solid rap w/ a screw driver handle.
I also put them in the ultrasonic bath, heat it, and run them.
Some can be soaked, then hit with air, from the nozzle end while powered up.
It's hit miss.
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Teching In
Joined: Apr 2014
Posts: 47
Likes: 5
From: Valley Center
I got 7 out of 8 clicking and spraying this AM ,mine are the multi tech 2 ,was searching online last night for a new set ,mine are 2 hole do you happen to know is the much difference if I were to put 4 hole multi tech 2 in without getting to involved in tuning?
