Hopefully anyone in here can help me with my pain in the *** Del Sol...
The car was running fine last summer and I just wanted it to wake up for the first time after rebuilding the engine (more information later).

To start with - this is the noise my IACV is doing:


Key position 2 - main fuel relais starts the pump for about 2 seconds, then stops - and the IACV keeps doing the buzzing noise (very loud, can hear it in the car with closed hood).

If I turn the key further the starter runs, the IACV noise gets a litte louder but my main fuel relais goes crazy (opens and closes superfast, can hear and feel it by touching the relais, almost sounds like the IACV noise - brrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr rrrrrrrrrrrrrr)

Aditionally, I have no sparks at any of the 4 spark plugs ( Denso Iridium ).

Now I'll list up what changed during winter:

Old stuff:

- Stock B16A2
- Header, other cat. converter, Invidia catback
- Stock ECU

New setup:
- B16A2 built for the new Turbo setup, rods, pistons, B18C6 head, bolt ons like a ramhorn, edelbrock Victor X + 65mm TB - basic stuff mainly.
Maybe the injectors are worth mentioning since they are the only changed electical part: Grams 1000cc

- Engine loom was taken from another engine which I took out of a known running car by myself, modified the injector cables with superseal plugs ( http://kojaycat.co.uk/WebRoot/Namesc..._Connector.JPG ) to the adaptor cables delievered with the Grams injectors.

- Put the battery into the trunk

- P28 ECU with built in Neptune RTP ( bought over a dealer in my country, according to him he orders at xenocron.com. Got a basemap too by the guy selling it to me since he is one of a few guys in my country doing the mapping for Neptune)


* In the follwing I'll describe what I already tried, but dont let you guide by it - if you have any idea which needs me to repeat anything dont hesitate and tell me! *

- Checked my distributor (coil etc.), switched the coil and ignition module to other known working ones - didnt help. Switched the distributor to another known working one - didnt help.
Unplugged the IACV and measured voltage before and after the coil: 12V.
Checked coil resistance 0.7 on primary and ~16k from prim. to sec.
Still no sparks at starting attempts with unplugged IACV.

- Changed the IACV to another known working one, buzzing was gone (and I thought hooooray its that easy... hell no...).
Tried to start once - had a spark again, but my main fuel pump relais still going crazy.

- Changed the main fuel pump relais to a known working one, switched key into pos.2 - IACV buzzing again. Switched back to the old relais - still IACV buzzing. Took a 3rd relais - IACV still buzzing, spark gone again at a starting attempt.

- Took my stock ECU into the car - didnt help anything, I got one spark and thats it, IACV buzzing, main fuel relais going crazy as soon I turn the key into start position.

- Took my old engine loom and connected all important plugs - didnt help at all, same problems as before.

So thats where I am now, slowly running out of ideas.
I checked my ground wires too, all of them are connected from the engine to the car, and battery ground to the car.
The wire coming from the transmission doesnt look a bit shabby but if I had no good ground connection my started should't run actually...!?

Anyways, I would be really thankful if anyone of you guys has some ideas for me for tomorrows search...

Thanks in advance!

 

Clean and tighten the G101 ground on the the thermostat housing.

 

I think its clean and tightened but will look after it !

Any other ideas?

Guess I just put some extra ground wires from the engines ground spots to the car to make sure theres no ground issue...

 

Start with G101. Then go from there.