New problem

It could be the TDC sensor for the 1-4 bank. The coil pins are Pin 1 and 3 are connected to the ignition control module which controls the firing of each side of the coil. Pin 2 is common to both sides primary coils. Not 100% sure but typically pin 2 would provide the supply voltage, 12 V, from the DME (ECU). Pins 1 and 3 are connections to ground which the ignition module opens and closes based on signal from the DME (ECU), which the DME (ECU) determines from signal it receives from the TDC sensor. All the parts, TDC sensor, coil and ignition module can be had for a total under $200. The 1-4 TDC sensor is a batch to replace since the AC compressor is in the way.

 

I guess I miss read your post. I though you said 1-4 was the problem. But yes, 1-4 TDC is blocked by the Ac compressor. 5-8 is on the bottom of the engine.

According to what I have, pins for coils are as stated for either side. Looks to me that the control for the ignition module connect to pins 1 and 20 of the DME. These should be blue and blue/black wires. Ground for the ignition module should be a brown wire. Wires from the coil to ignition module should be red (coil pin 3) and red/black (coil pin 1). Wire from coil pin 2 to power should be Orange/black or yellow/black (does not connect to DME but to a power block from the ignition switch (key on/off)). The blue and blue/black wires from the ignition module are the only ones connected to the DME.

Best I can do.

 

FWIW, you can download the manuals here:

355 - Ferrari DIY, Classified, News & More

Looks like the wiring diagrams are in manual 3 starting on page 189.

 

Here is the pix

Pin 2 of the IGN coil, org-black goes to ground outside the picture area.
The blue wire of the POWER MODULE goes to pin 1 of the ECU unit
The BLUE BLACK wire of the POWER MODULE goes to pin 20 of the ECU unit
The BROWN wire of the POWER MODULE goes to ground.
Image Unavailable, Please Login

 

Orange/black is power.
Image Unavailable, Please Login

 

I stand corrected.

 

I know what your problem is. That is the 3 pin connector for the idle valve. The mechanic before swapped the two connectors idle valve for coil and vice versa. It is never going to fire. Swap them back. Good luck.

 

I love happy endings.

 

Yes, good skills yelcab.

 

It's not skills, I got fed up with the wiring diagrams so I made very large copies of all 348 and 355 schematics with all the wiring colors deciphered and the connector names added right at the connectors. Once he showed me the wire colors, I knew what his problem was.

It also helps that I have the same car and I recall there are two 3-pin connectors in that area, next to each other.

 

This is what makes FChat a great resource.

 

Nice call Mitchell

 

That is very helpful to have those schematics well detailed. I too think those diagrams in the wsm are prehistoric. And that is unfortunate because the wiring that is actually in the car is detailed well enough from the factory. Great info!

 

Each wiring diagram page in the WSM is cut into 4 pieces and sent to the four corners of the globe. I had to resize, enlarge, rotate, combine them into a single sheet, add the english names for each component (idle valve, instead of F11), add wring colors, then take them to Kinko to print out to size 24 x 36 inches.

Now they are readable,

 

+1

Thanks for posting those pics, guys... I was having problems reading some of the colour codes. They help fill in some of the gaps in the diagram I was redrawing.

By the way, shouldn't that power wire to coil be Yellow-Black? ("GN"/ Giallo/Nero)?

Work in progress....

1994 F355 Ignition System (Cylinders 5~8)

Thanks,
Cheers

 

Brilliant! Good call, Mitch.

 

By the way, for those struggling to trace wires on the WSM diagrams if you open the WSM with Adobe and click on the page it highlights the background in blue and the wre traces become clearer. See attached.
Image Unavailable, Please Login