hey, swapped 3800 engine in a 99', got fuel to the fuel rail but it won't start, we had to switch out the fuel rail and injestors on the new engine for the one on the old engine, the engine will hit using starting fluid, but won't start, thanks

 

either too much or not enough fuel.. ws it a 3.8 you took out and just replaced with another 3.8, or was it a diff motor.

 

yes it is a 3.8 for a 3.8 the old one is out of 99' new out of an 01'

 

Way are you swapping into? Did you get everything hooked back up on the computers? Maybe you missed one of the connectors under the dash? Do you have spark?

 

how come you had to switch the rails and injectors? They both are on a obdII system. Are they different size? If it fires with quick start, but not when your starting, you need to figure out the fuel to air ratio.. To me, it sounds like by switch the rail and injecotrs.. its either not compatible with each other and its causing it to stave or choke on fuel...

 

it will hit and try to start with ether, so it's at least gettin some fire, i guess, we're new at this so bear with us, whats the best way to check for fire?

 

the plugs off the wiring harness was diff

 

your getting spark, but are you getting spark on all cylinders? The best way is to check each coil by taking a plug out, putting it on the spark plug wire, and have it grounded on block.. have someone to turn over the key, and look for spark on each plug.

There could be even bad plugs in there, or a plugged up fuel filter.. air filter.. lots of ideas to check out.

 

Check out your local parts store for a inline spark tester. You can also get in inline node light for see if the injectors are firing.

Are you sure you got the firing order right? You may want to check the fuel pressure. There should be no probelm with switching the injectors like you did. That is exactly what I did when I put my 02 motor in my 96.

 

No matter the swap, what is the compression? Throw a timing light on a wire and crank to see spark. Pour a tiny bit of gas down the t-body. Starter fluid likes to blow head gaskets. You are making sure you have your 3 basics to start an engine:
1. Spark
2. Fuel
3. Compression
Eliminate one of the 3 and she ah no runnah.