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Username Post: One injector pulse        (Topic#348809)
Bigswole 1999 
Forum Newbie
Posts: 1

Reg: 12-21-17
12-21-17 08:34 PM - Post#2718726    

I have a 95 gmc k1500 the truck was running fine i put a dash in it and the hvac box out of another truck in it during the process i had to unplug the computer and once i put everything back together the the truck ran like crap so i started looking and only one injector was fireing so i read on another form that d14 and d16 in the ecm plug were the injector drivers so i checked the plug and all of the wires were fine but d 16 pin in the was bent so i straightend it back out and still no luck any help would be greatly appreciated

"7th Year" Silver Supporting Member
Posts: 3886
Loc: Salt Lake City
Reg: 06-20-09
12-22-17 07:24 PM - Post#2718815    
    In response to Bigswole 1999

Have you checked yor ECM fuses under the hood?


'95 K1500 Z71 EC Short Step 5.7L+0.040/NV3500
'00 Explorer XLT 4.0 V6 Auto
'94 K2500 5.7 NV4500 ECLB - SOLD

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Posts: 2330
Age: 32
Loc: Utica ny
Reg: 04-13-10
12-22-17 09:12 PM - Post#2718822    
    In response to CowboyTrukr

You are on the right track with that pin.
Check for pulse output from that wire while running. Should pulse a negative every time it goes to fire the injector.
Likely you have a bad connection there,
How bad was the pin bent (in the ecm I assume)

Old School GM fan FOREVER

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