Tomalex92

Ok so I've come to a brick wall here guys. Did a motor swap with my 92 3vze and low and behold she won't start. I've checked the spark, no spark, checked for fuel, no fuel. I noticed that when I go to turn it to the "on" position no check engine light. I checked the EFI fuse and relay under the hood got power to that... I don't have power to my AFM not do I have power going to my distributor. I'm to the point to where I'm just completely lost now.... I really need help with this any help would be greatly appreciated. Thank you....

scope103

Tomalex92 -

Didn't you just post (yesterday https://www.yotatech.com/forums/f116...-3-0-a-300760/) that you confirmed you HAVE spark and fuel and CEL? What changed?

Also, didn't you also mention in your other thread that you have an after-market anti-theft circuit interrupter? Wouldn't that explain ALL of your symptoms?

Tomalex92

Yes but I'm pretty sure that the aftemarket anti theft only stops the starter.

Mykedeee

I literally just fixed the same problem you have...check your VAF, disconnect the sensor and turn ignition on...if your check engine light comes on then there is the problem...and for ˟˟˟˟s and giggles crank the motor and it should fire up then die right after...but swap out your VAF...DO NOT REMOVE THE TWO BABY PHILLIPS SCREWS THAT ATTACH TO THE SENSOR!!! good luck

Tomalex92

I just tried that and it didn't work

Tomalex92

Is there a way to test of the ecm is bad

scope103

No.
The ecm has nothing to do with fuel pressure. If you have no fuel, no spark, no check engine light it's not the ECM. Most likely, you're not powering anything, and that's very easy to check for.

Tomalex92

how would I check that??

Tomalex92

My other dash lights do come on like the seat belt and the at temp light still come on though.

scope103

You can check for 12v to ground at B+ in the diagnostic connector with key-on. If you don't have 12v there, you have something out in the EFI circuit (fuses, relay, ignition switch ....).

But you had spark, fuel, and CEL. And now you don't. What changed?

Tomalex92

That's the issue I don't know what changed I checked the B+ and there's absolutely zero power.

Tomalex92

Didn't have cel though

Tomalex92

My coil and ignighter do have power going to them.

Tomalex92

Relays and fuses are good to

RAD4Runner

Got schematic?

Tomalex92

Yeah pulled one from the web.

RAD4Runner

"Pretty" is not 100%

Care to post high-resolution schematic section containing the parts you are not getting power to so we can help?

Tomalex92

Yes I'll do that

scope103

When you say the "relays are good," what does that mean to you? Which ones did you check? Are they closing with key-on? Did you pull the relays and test them? Do they have voltage to the socket pins (coil, contacts) that they should have?

There's less than 6cm of wire from the EFI relay to the B+ terminal. If the relay is "good," you don't have very far to look for the break.

Tomalex92

I replaced the relays then I tested the sockets