Ok i need help I recently built a 351 w i have a 96 f150 and it had a 300i6 in it I swapped the 351w in it got a new computer get the wiring harness and everything i have no pulse to my injectors i have fuel in the fuel rail tho... When i plug in a code reader it doesnt power on my motor runs if i spray starter fluid in it and then just dies out real fast im really getting frustrated and im about to make it carborated if anyone has done this swap before in obd2 please help!!! Or if anyone has done a efo to carb swap please let me know what i need...if someone has anything to help please let me know

 

Punctuation would help a lot. Please explain "I swapped the 351w in it got a new computer get the wiring harness and everything".

Where did the wiring harness come from?

Have you checked for power at the injectors?

Personally I hate the 300 I6, glad you got rid of it. Need more details on what you swapped in.

PS...can the attitude, it will net you nothing. We all want to help you but starting out with the comments in your original post will send most folks to the next thread.

 

I got the harness out of a obd2 what i was told... It doesnt have a crank postion sensor so no 100% sure but i have no power to my injectors i have spark and fuel tho just not getting spit in the intake

 

I swapped it in a 96 f150 5speed

 

What? The code reader? Its battery powered so it should turn on regardless but if what you're saying is it doesn't communicate with the PCM then that isn't good and suggests the PCM may not be powering on. Do you get a check engine light when the key is first turned to the run position?

 

Is there a connector for the crank sensor? And do you have one hanging for the EGR sensor too or did the harness have the correct connector for that? I'm guessing your motor is not from a '96 truck.. is that correct?

 

Yes i have a check engine light but no power to the code reader it wont turn on it

 

Yes it is a 1990 motor but no that harness doesnt have a connector its hard to find out if its a 96 harness or not ive looked everywhere online , around etc its like trying to find a needle in a haystack

 

Check your fuse boxes for blown fuses. The cigarette lighter is on the same circuit as the code reader port.

 

What about the truck not starting like i said im getting no power to my injectors

 

OK relax.. you just found the wizards with a map to the haystack.

If your engine harness does not have a connector for a crank sensor and does have the correct connector for the EGR sensor on you '90 then it is not a '96 OBD2 harness. I can say this with 100% certainty because the crank sensor and the EGR system are the two things that are unique to the '96 motor.

 

Now the only thing i wonder is if i did get a 96 harness would the crank sensor still work with out that pulsor ring on harmonic balencer

 

No it would not but that won't prevent the motor from running, your no start condition right now is because with the current engine harness there are probably a whole lot of things that aren't connected where they should be.

 

Last question if i want to swap it to carborated what would i need to do

 

But i hope ur right im gonna try to go buy one more harness forsure a 96 but if it dont work im done with efi