I just finished installing my new engine I got from an importer and we put everything in...The car starts but dies immediately and I don’t know what to do now, there’s no check engine light or anything.
One very common "failure to start" in these motors if any work is done in them is that the timing plate is installed backwards, IIRC the concave side should be to the outside and the spacing between the crank sensor and the "nub" on the wheel is about the thickness of a credit card.
Another big variable in this is that you don't know if the engine even ran when you bought it. If the timing belt breaks there will not be any damage to the valves/pistons but obviously the engine won't run. Remove the oil cap and while someone turns the start key watch the cams to see that they are moving. Have you checked compression?
In order for the engine to run you need air, fuel and fire -and in the right order-. Are you getting fuel at the rail? Are the plugs firing? A quick way to determine if the issue is fuel or fire is to squirt a blast of Carb Cleaner ot Starting Fluid into the manifold and try to start it. If it's lack of fuel it should run for a bit depending on how much stuff you sprayed in.
It it fails to start then it's an spark or timing issue.
And, DO NOT JUST THROW PARTS AT IT guessing that it could be this or that... If you still have the old motor there is your source of "known good" parts to try with.
I see.... weird, basically almost the same block. Mazda builds cars "from the parts bin", ie they don't usually design parts specifically for a model if they already have a usable one already designed....
In a pulled off and transported motor -god only knows how, the chances of breaking / bending a couple of the nubs are good.
This is funny, I'm waiting on variable int stalk from 03-08 Matrix right now that is plugnplay for my 04 Scion xB that didn't come with them either................did add it to the P5 as well long ago, IIRC was from Tribute.