I am currently in the middle of swapping a TPI engine into a Nova and am stuck in hard spot.

I have swaped the engine, bought a standalone wiring harness and 2 730 computers. I was going to try and start the engine, with it in the car, before i installed the fenders, hood etc. The fuel pump is just pumping gas from a small gas can and is an external mount type. But i have run it to a BIG problem.

I hooked the computer up and checked everything, fuel pump came on, Map sensor hooked up, injectors hooked up, distributer firing, the engine is in time. I only hooked up what i thought the engine would need to just start and run for a couple of seconds this included: MAP, TPS, all injectors, Fuel pump, with a return, Distributer (that has EST a bypass), IAC, Coolent sensor and Air Sensor, it also has a VATS bypass and of course a power and ground wire for the whole thing.

now here is my problem. I was trying to start the engine and the fuel pump case shorted to the chassise. It fried the fuel pump ground wire, but other than that the fuel pump was fine, but everything was not ok. Now when you turn the key to the on position the fuel pump does not come on, when you try to start the engine there is no Spark, the injectors are staying on (checked by watching a test light and spinning it over, the light stays constant on both banks), check engine light does not go off, and I can not get into Diagnostics to pull codes.

What i have checked: There is one main ground wire that everything is hooked to it is fine, i unhooked the ecm and everything and feed power into it and checked it with a test light
i checked the main power wires: one has power all time and a fused link, it is fine, then one runs into a small fuse block and sends constant power to the injectors, and one for the a ecm power source, these are all fine.
All of the main wiring seems to be fine from the looks of it iam going to ohm every wire on it tomorrow.
Basicly now the computer is not sending out any signals what so every, the injectors are not cycling, fuel pump is not comeing on, and there is no spark. I changed the computer thinking i back fed power to the computer when i shorted out the pump but it did not fix the problem.

I would like some sudjection on where to go from here and what you think might be wrong with it. Also VATS does drop voltage because my test light dims when i check it but i have not seen how much. Thank you in advance.

 

check the ignition moduel it may be fried

 

Did you blow a fuse in the process?

 

The ignition module wouln't stop the fuel pump would it?
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Nope i have cheched them about 100 times by looking, ohming out and a test ligt so they are good.