Replacement Injectors

[silentdub]

We have a hard start after the vehicle is warm and then if it sits for a little while, it starts right up. We believe the original injectors are leaking so we ordered a new set of AC Delco Injectors, however, when we installed these injectors none of them fired. We have 12V to the injectors but not a single one fired which seems strange. We installed the old injectors and it starts right up so clearly we have the incorrect injectors.

We were provided the following AC Delco part numbers:

GM AC Delco: 25519365 NLA
AC Delco: 2173125 (None of them fired)


What are you guys using for replacement injectors and do you have a part number?

Appreciate your feedback!

 

[pacecarta]

they may be stuck from sitting on shelf
key on injectors have 12v at the plug its the ground pulse that commands them open and at startup thats a pretty weak pulse and they may stay stuck
i use a short bosch injector connector pigtail and a 9v battery to make sure they click before install

sometimes they click when plugged in sometimes i have to keep them plugged in and tap the inlet end on a table to help free the pintle

fwiw id be changing out the fuel pump based on what your symptoms are