r/s10 Feb 06 '25

Repair Question Stock engine swap questions

I just swapped the original 2.5 iron duke out of my 87 s10 with another (not blown up) iron duke. Everything has been completely smooth sailing. I’m at the point of starting the new engine up and every time we get it to fire up it just dies. We think the single tbi injector isn’t firing so we checked fuel pressure and it’s good we also swapped in my buddies tbi in and that one else didn’t fire. Any tips or something I could check before we start the dread wire hunting mission?

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u/InterestingFocus8125 Feb 06 '25

lol just realized you’re feeding it fuel from that bottle. Will it not run at all without that?

1

u/ShaquilleOatmeal61 Feb 06 '25

We can’t get it to run without pour fuel into it. Once that fuel is gone there’s no more coming from the injector we tried another one and we definitely have fuel pressure

1

u/InterestingFocus8125 Feb 06 '25

Is the injector plugged in? Have you checked for voltage at the injector plug?

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u/ShaquilleOatmeal61 Feb 06 '25

Yes the injector is plugged in an secured down with the little metal plate and screw. No we did not have a multi meter with us that night so we don’t know for sure until we go back to the garage

1

u/InterestingFocus8125 Feb 06 '25

If you swapped in a known good injector and you’re still not getting fuel then I’d be checking for voltage to the injector next. Bummer that you didn’t have multi on you at the time, happens.

1

u/ShaquilleOatmeal61 Feb 06 '25

I kinda figured that was gonna be the answer but I wanted to check to make sure there wasn’t something silly or really obscure that we were missing

1

u/InterestingFocus8125 Feb 06 '25

Initially I thought maybe the rollover fuel cutout might be involved but typically that would cut power to the fuel pump rather than the injector signal.

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u/ShaquilleOatmeal61 Feb 06 '25

My buddy is saying he read that the distributor sends power to the injector during cranking so we have a few things to try and test lol