355 cabin earths/fuse block earths. 1996 5.2 NO SPARK!!!!!

Hello I have an intermittent NO SPARK issue which i thought i had fixed. Can someone give advise as to where the Main Fuse/relay block earth is and also any other earth terminals inside the cabin. I'm pretty sure i have all the earths on the engine and battery to isolator/body sorted. My car has the strap from the alternator to the chassis added already. i have power at the coils when ignition is on. i have replaced all fuse and relays in the block. Is there any thing else that i could check?. I'm sure its just an earth problem but could be wrong?. Battery has been load tested i even added a jumper pack to assist it still would not fire up. Engine cranks over very well. Immobilizers have had new battery's also as has the siren. I have also recently replaced the crank angle and phase sensors hoping to eliminate any problems to no avail. Thanks in advance

 

Starts one day then not the next. Quite frustrating. I'm reluctant to use contact cleaner on the ECU. I may have to clean that with old fashioned elbow grease lol

 

5.2 no spark both sides only 1 ecu

 

I'm leading towards a fuse/relay block problem. Fuel pump fuse has deformation but not blown which tells me there is an issue possibly on the internal board? Dry joints

 

Timing light offered no light while cranking on multiple cylinders

 

Cheers for that I will check that or those plugs. Relays for fans have been relocated away from board. Currently checking the board out for internal problems. So far looks really good except for plug/pin contamination were they plug in on the rear of the board

 

Just checked plugs at columb???? Main power cable plug from ignition was partially unplugged due to being caught in in steering columb adjustment lever????? man that has gotta be at least part of the problem you would think. Every time you adjust the steering it is working the plug loose DOHHHHHH

 

Ok so i have removed and checked fuse/relay block Some soldered joints have already been repaired and board looked really good. I cleaned all the terminals on the back of the board and reinstalled it, checked and re-clipped the main plug at the steering column and still NO Spark. Put a fuel pressure gauge at the fuel filter pressure point and have plenty fuel pressure when the engine is cranked so i may be wrong in assuming the if i have fuel pressure i must have a functioning crank angle reference sensor? Is it possible to have the ECU bench tested?? or can both coils just **** them selves at the same time?? any help greatly appreciated

 

Finding it hard to get a code reader that will work? the one i have worked once and i deleted the faults and now i wont connect to the ecu anymore Im going to do some more diagnosis on the weekend. Also how would i check the coil Signal? Would it be 5 volts? I know it needs 12V power but unsure of what trigger signal to look for while cranking

 

The check engine light goes out when engine is first fired up after its system check. It goes out within about 5 to 10 second after the engine is running

 

I spoke with specialised ecu services in Florida this morning and they believe it's a wiring issue as it's intermittent but are happy to bench test if I send ecu fob and immobiliser unit to them

 

I have spoken to Michael Ian and he also given me a few things to check I'm just waiting on my continuity tester to show up

 

Hello All
With some help we have found the ECU to be defective/dead. Thanks for everyone's help/assistance and idea's as to what the issue could have been. If the ecu cant be repaired i will be in search of a USA spec gated 6 speed 5.2 ecu. Thanks again