hi. i just finished swapping a 5.2 into my 97 dakota and it starts and runs for about 2-3 seconds and i started it like 20-30 times and always the same i can rev it up but it dies quickly.
The car stood outside for a year of hard winter and summer without the engine and a emty fueltank but all hoses and fuel lines vere sealed.
Im thinking it could be dirt in the fuel tank/lines or maybe the fuel pump but not sure.
any ideas what it can be?

thanks.

 

Test your fuel pressure. I think 45-50psi

 

is it possible it´s some kind of anti-theft alarm in the ecm? becouse i installed a diffrent ecm.

 

if it sat for a year u prolly have deposits in ur injectors.. fuel dont last as long as it used to. im a small engine mechanic and deal with it each and every day..

 

the truck sat with out the engine for a year, the engine is all clean and nice.

thanks

 

I had a similar problem with mine, but my check engine light was intermittently on and off it ended up being the crank shaft position sensor went bad easy fix! hope this helps!
good luck

 

The problem is the anti theft system. Put your key in the passenger side door lock and turn it to unlock 2 or times and then try to start it. Should fire right up.

 

If it were bad gas or moisture in the fuel the truck would start and run real rough, or not start at all.

 

tried it and it didin´t work, any other idea? <br />
do i maybe have to take it to the dealer and get a new key computer and re-coding becouse the ecm is not from this car and didint came with the engine. but it is for 98 dakota 5.2 4x4 auto