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Random loss of power


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#1 01OBK

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Posted 04 December 2017 - 07:54 PM

Alright brains trust, I've got a weird and persistent problem that seems to happen on the stock ecu/stock tune.

I get random periods of absolutely no power at all, sometimes they're short 2-5mins periods sometimes as long as 30-40mins of driving, trans doesnt want kick down either, even with my foot on the floor. Also idles rough too, the engine stumbles and shakes like its got a misfire but the exhaust doesn't sound like it does, if that makes sense. Doesn't fluctuate revs at idle, stays around 750rpm just runs rough.

From what I can tell (no boost gauge) I'm still getting a small amount of boost, below 7psi, the gfb BOV doesn't open below 7psi I can hear the primary flutter.

Then randomly as I'm driving along it's almost like a light switch and it's back to normal.

I don't think it's anything to do with the engine side of things cause it doesn't do it on the Zero/Sports ecu only on stock (stock ecu has been modified by Eculabs but used to do it before it was modified)

Any ideas would be greatly appreciated cause I'm completely stumped

#2 patrick27s

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Posted 07 December 2017 - 10:26 AM

I know this might sound obvious but make sure the looms for the ecu are in properly could a shitty electrical connection causing issues,

My car had issues after swapping ecu’s and one of the cables had come loose (well actually I had to solder the cables back together when I removed the zs sequential controller, and the solder joint must have snapped when I swapped ECU’s.

Also I had a similar issue to you after swapping my intake manifold and it turned out to be a loose connection in the manifold loom.

Just something to double check

#3 01OBK

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Posted 07 December 2017 - 03:31 PM

Yeah I've checked all the connections they seems fine.
It's just weird that it only does it on the stock ecu.




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