Terminator X problems starting engine - loud bang!
Thread Starter
Teching In
Joined: Dec 2020
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From: Wisconsin
Terminator X problems starting engine - loud bang! I have just configured my Terminator X with my LS engine. I used one of their template programs to get me close on their Terminator X software. Downloaded and did a TPS autoset. Everything is green and happy. turn on the ignition and the fuel pump primes. The first time I tried starting it sounded like it wanted to start then I heard a loud bang from under the dash where the computer and fuse panel is. Also that is where my headers end as well so I wasn't sure if something in the computer blew up or the engine backfired. Smelled like something burned but couldn't tell if it was fuel or electrical. Checked every fuse and nothing was black on the fuse panel and computer. Everything is still happy and green on the Terminator X and can read all my sensors. Now when I crank it over it doesn't even try to start. I'm getting 60psi of fuel pressure. I definitely think my problem is spark. Does anyone know what would cause the spark to not fire??? Could I have blew something and have the computer still be happy? Perhaps I a noise issue? I'm running all the cables back through the same firewall hole. I believe my grounds are pretty good as well.
TECH Fanatic
Joined: Jan 2022
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From: Seattle
I'd start with unplugging the harness and then reconnecting everything, doubt and triple checking that things are grounded and hooked up properly. Especially the odd and even banks of injector plugs.
You do have both grounds, on each cylinder head on the back also, correct?
Are the injectors new, or used? Have they been sitting at all? Your probably correct in the ignition situation, but more info is always better.
Are the injectors new, or used? Have they been sitting at all? Your probably correct in the ignition situation, but more info is always better.
Thread Starter
Teching In
Joined: Dec 2020
Posts: 33
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From: Wisconsin
yep both are gounded to the back of the heads. Injectors are brand new.
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Verdad Gallardo Also, I went through an incorrect calibration causing that little fuse to blow. if you do eventually find that fuse is blown, it might be in your ignition setup. Negative trigger vs Positive trigger if you ran a custom ignition calibration.
Have you gotten anywhere? Are all the lights green on the unit while cranking? I believe you can do a cranking log on it to help troubleshoot it. Just make sure your logging the correct stuff, and post up a log.
Thread Starter
Teching In
Joined: Dec 2020
Posts: 33
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From: Wisconsin
Great idea about the data log! I'll check try it out sometime this week. Thanks!
Thread Starter
Teching In
Joined: Dec 2020
Posts: 33
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From: Wisconsin
cant remember how many switched power wires there are on the holley harness. check to make sure they are all hooked up to a power source that is hot with key in on position and cranking position. learned that the hard way