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  1. Mathies

    tbi no injector pulse 1989 k1500

    Really appreciate all the help But when the truck is running faster then 400rpms the ecm should take the injector spray over right? Bcs when i let it for like 20 sec on start pilot the injectors still wouldnt spray. And ill take it to a mechanic so he can use a scope and see if there is rpm...
  2. Mathies

    tbi no injector pulse 1989 k1500

    Okay ill test with a led light if i cant get my hands on a noid light. And could it be the prom mem call then bcs i bought a new ecm.
  3. Mathies

    tbi no injector pulse 1989 k1500

    Is there any other way to test it bcs the noid light is out of stock and they prolly wont have in a shop nearby
  4. Mathies

    tbi no injector pulse 1989 k1500

    Bcs of the lpg that was in my truck i needed to reconnect the injectors wires. I did it this way is has zero resistance but coud it be the ecm cant ground it fast enough bcs of this? And okay ill buy that noid light. Hopefully it wil come quick bcs i moved and my truck has to be out of here by...
  5. Mathies

    tbi no injector pulse 1989 k1500

    I also tested the injectors with a litlle 9V batt when i connected the batt to injectors for a very short time i could here the injectors work but no spray does this rule out the injectors are faulty?
  6. Mathies

    tbi no injector pulse 1989 k1500

    I meant both injectors dont pulse and it was with a normal test light. Should i buy a noid light and test everything again? Okay ill try hitting it gently when cranking but wont think it wil solve bcs the ecm doesnt ground the ecm.
  7. Mathies

    tbi no injector pulse 1989 k1500

    hey guys after buying a new ecm a lot of the problems where solved but one the injectors doesnt spray fuel. i already diagnosed a little. - i have spark in al 8 cill - the ecm recieves 12V to D14 and D16 - the injectors have 1.5ohm wich is above 1.2 - when connecting test light to injector...
  8. Mathies

    Prom + ecm?

    It just layed on the backseat of my car for 2-3 days an before that i left it uncovered in my garage for 2-3 weeks. And yes i heard of that ill try it out on e new ecm and see if my truck wil run.
  9. Mathies

    Prom + ecm?

    Its indeed a 89 with the 1227747 ecm number. And thats what happend i let the ecm with the cover off. The sticker with the 4 numbers is stil readable its 1389. Thx for replying i wil check out gearhead efi. And no i didnt verify yet bcs the delco 60904 is broken on my ecm wich actuates the...
  10. Mathies

    Prom + ecm?

    Hello Does anyone sell a ecm + prom For a gmc sierra k1500 5.0 with th700r4 trans. I let my ecm out in the open air with direct sunlight and i heard thats no good and will cause them to dont work anymore. So i think im pretty ******. I didnt know that and hate myself for it Thanks in advance
  11. Mathies

    89 electrical

    thx i found a replacement part i think the 4 numiric number doednt matter if the other ones are the same? And ill have a trady do that for me.
  12. Mathies

    89 electrical

    On my truck its protected by a fusible link 0.5 mm 20 awg. And thats the problem where i live it IS hard to obtain bcs i live in belgium and im like one of a very few that has one of these or a gmc from of these years in general i could swap ecm with. Thats my biggest problem if i want one i...
  13. Mathies

    89 electrical

    I hope you can see it on the picture
  14. Mathies

    89 electrical

    Hello i think i found the issue tot the problem although i hope so. After further inspection of the ecm i saw what you guys can see in the picture what looks a slightly burnt solder on the pins on the delco 60904. I found a video of a guy repalcing it and he states the ecm was unable to fire up...
  15. Mathies

    89 electrical

    thx for the answer and method to de-pin m connector. i tried connecting only A and B and unhooking C D and the other way around the fuse still pops. i also measured ohm between all the pins on the connector and ground only B8 has continuety to ground and ofcourse D1 and A11. B8 goes to the AC...
  16. Mathies

    89 electrical

    Thats the problem the fuse always pops. This is how i wired the last time and the fuse stil popped. JB is junction block and the wire going to c16 is the only one screwed to the junction block and ofcourse the batt cable
  17. Mathies

    1990 tbi ecm shorting

    Hye shurkey im having the exact same problem here with my truck i also aplied fuses on the orange wire unplugged the injectors so the injector cant be the problem. I measured ohm between c16 and d16 and read OL so thats good right? Could it be the ecm has failed? Or still a grounded wire in...
  18. Mathies

    89 electrical

    is there also a way to check the place where the cables go trough the firewall to the ecm on the passenger side?
  19. Mathies

    89 electrical

    i double checked those wires they are all good and no short to ground. i even unplugged al the other fusible links on the junction block so no other component other than my ecu and starter could recieve power. the inline fuse i put in myself still burns when i try to aplly 12V to my grounded...
  20. Mathies

    89 electrical

    c16 is protected by a fusible link and it reads 0.5 SQ. MM Fusible link it the grey one in the picture it also says 20 but idk what that means. i also find it kind of strange the fusible link still works. yes if none of the ecm connectors are hooked up c16 doesnt draw excess current. c16...
  21. Mathies

    89 electrical

    Its a gmc sierra k1500 from 1989 5.0 v8 with a 700r4 transmission. First had no spark changed spark plugs, icm, rotor, cap, coil and pickup coil had spark. No fuel pump prime. Changed fuel filter an fuel pump (it wasnt bad but changed bcs it would probably go bad in the nezr future). Stil no...
  22. Mathies

    89 electrical

    i also disconnected al the fuses, relays nothing seems to work/help
  23. Mathies

    89 electrical

    hello could someone maybe help me my ecm burns internally on pin C16 thats where the 12V come from the fuse link. i disconnected al the plugs from my pickup but it stil burns out. if i put 12V on the ecm and ground it on the batt it doesnt happen. so im guessing something is shorted out from...
  24. Mathies

    Help 89k1500 pls

    Could anyone tell me what this is in the first picture? And do you have any idea where this should plug in i cant find anything. (Second picure) And on the 3rd picture should there be a relay or is this normal like that. It has a black, orange, tang and green wire goin to it. Pls help im...
  25. Mathies

    ecm pin C16 blows

    hello a while ago u guys helped my diagnose a faulty ecm, the circuit that goes from pin c16 was blown like you can see in the picture. i got it repared by a local ecu repair guy. now when i installed the ecm again and when connecting the batt neg side i heard that it blew again and it did when...

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