Over fueling, cutting out, over revving idle

21st December 2014, 16:34

Still trying to fix this problem

Symptoms:
Over fuelling
Cuts out

if I fit a brand new icv it revs to 4k rpm, then cuts out
If I fit a icv that I've manually wound out, it revs to 1k rpm then cuts out.

At one point I did have it idling at 1.5k rpm, but driving it, it hesitates and stumbles badly all through the rev range.

things I've changed:
map sensor
icv
temp sensor
tps sensor
coil pack
plugs
lamba sensor
edit: crank sensor changed no change

i'm now about to take off my predator ecu and put my standard ecu back on and see what happens...

21st December 2014, 19:13

Just put my standard ecu back on, started first time on the key without hesitation and idled without stalling, obviously ran like a bag of shit because of the bigger injectors etc, but clearly there's my problem....

21st December 2014, 19:47

I reckon your problem either lies with a faulty ecu,or an incorrectly mapped one.

21st December 2014, 19:48

Like Stevo said, sounds like a shit map

21st December 2014, 20:32

Well it was a bastard to map apparently, as I had starting issues which I thought was the icv, but now with the standard ecu on, it fires instantly and idles fine :s After it was mapped, the only issue was the cold starting, after it was warm, it boosted fine, no hesitating what so ever, well it's booked in again to have a look at the map.

My mapper has told me it's a common problem with TU engines and megasquirt ECU's to fail

21st December 2014, 20:38

Well then it's gotta be either a dodgy ecu or the map. I'm still betting on the map tbh but surely he'll be able to tell you when you take it over

21st December 2014, 21:22

Hopefully it's just the map, if not, i'll have to send it back to Andy to have it fixed

it's booked in for the map to be looked at after the new year