weak injector pluse 94 tbi

[Rusty Plowtruck]

As the title states 94 k1500 5.7 tbi 63,000 no start. I had no injector pluse on the noid test light till I tapped on the ecm (behind the glove box)now the noid light starts out bright and gets dimmer each pulse thereafter the truck still won't fire. The fuel pump has less than 1000 k. Am I looking at a new ECM for my old truck?

Thanks, Rusty

[Rusty Plowtruck]

Happy New year. My truck is dead

[ChevyTech007]

I would say you need an ECM. The injectors get 12 volt direct from a fuse and the ECM pulses them by providing the ground.

[Rusty Plowtruck]

Hey, Thanks for the reply, have a HAPPY NEW YEAR!!

[SPARK CHASER]

You might also check the ecm connectors for corrosion or a bad pin or socket. Spray some electronics cleaner into the connector(s) and reassemble. I'd try that before buying a new ecm. Those things can be expensive.

[Rusty Plowtruck]

Well the new ecm did the trick. I replaced it before I looked at the last post. The pins didn't look bad so I don't know if that would have worked but thanks for the reply. The "new" ECM was less than $ 100 from NAPA and the truck is just a beater so wth.

Jim