Delco ecu issues

[Shoslr]

Hey fellas,
Just after some advice on the delco ecu.

One of my cars is a vn 355 running delco which was professionally tuned by efi dynamics in lilydale (melb)
Car been running fine for at least 5 years.

Recently i had to put i back to daily duties as my daily car was off the road.
Car was fine for about 3 weeks, and without any signs, car started running like a pig.
Trouble to get started, wont idle and very bad miss, running very rich and blowing heap of black smoke.
I started with the obvious and checked plugs and leads. Then changed ign module and coil. None of this helped.
I have a heap of spare ecus, so i changed to a v6 ecu and put my memcal in it.
This now seemed to have settled the car down a heap.

Question is, is it common for the delco to just shit its self like that, what actually goes wrong with them, and is the v6-v8 delco exactly the same and just the memcal different, or would i be stupid to attemt to drive the car like that.

Cheers steve

[delcowizzid]

They are know for the coolant sensor circuit to fail and they go rich blow black at idle and struggle to stay running and are hard to start hot.your fine to swap your memcal into another ecu it's the same ecu in both v6 and v8

[Dylan]

What other mods to the motor?

[Shoslr]

Cheers delcowiz, was pretty sure that was the case but rather check with the experts that ruin a 15k motor.

Dylan
355 billet callies crank, custom grind clive cam, torque power manifold 1000cfm top mount throttlebody, roller rockers, a9l rods, all the normal goodies. Street tune for reliability.

Have a vn v6 track car with a sc14 which i lunched the last motor and got a eeprom from this site but am like a blind person trying to work all this stuff out.
Not it tech savy at all.

Have moved all wiring, fuse box, and coil pack under dash but still yet to try get it started. Have 4 weeks before my next track day

[Dylan]

Sounds like a winner the stroker. How'd it go as a daily? Good Street manners?

[Shoslr]

Yeah been a good rig.
Drove a a daily when i first built it but thirsty on fuel.
Stall isnt over the top -3800- so still conservative. Runs fine, good street manners but has balls when you want it.
I did have a d/h monent a few years ago when i entered it at springnats and peer pressure got the best of me to enter the skid comp.
4 minutes later she got a tad hot.
Seemed all good, but a few weeks later i had a photoshoop for street comos with vnss club, and car wasnt running right.
Realised when she overheated ithe harmonic ballencer bolt worked its way loose and sheered off the key way.
Damaged the end of the crank, but luckily was salvagable. My wng builder machined it down and had to have a custom ballencer.made to suit the thinner crank shaft end.
besides that self inflicted issue, car has run mint.

[Dylan]

Awesome. Get all your tuning gear sorted and hook up to this and give the fuel a touch up it'll love it.

[Shoslr]

Yeah was thinking of hooking the modified delco upto the 355 and tinker but i dont want to stuff the tune done by efi dyn. Cost 750 to get done originally so want to make sure i know what i am doing first.

Need to get the racecar sorted. I know the sc14 are a waste of time but im too far onto it now.
A mate stuffed with my laptop last week and now i cant unzip all the files off here to open in tunerpro.

[Shoslr]

They are know for the coolant sensor circuit to fail and they go rich blow black at idle and struggle to stay running and are hard to start hot.your fine to swap your memcal into another ecu it's the same ecu in both v6 and v8

Do you know if these are repairable or would i be better just to bin that ecu mate?

[Dylan]

You won't stuff it. Take a read first and nothing can go wrong.
Fair chance it'll be a kalmaker tune but that's easily converted to 12 P