4 replies to this topic

[maccers]

I have a retro fitted dual point fuel injection system into Eaton Super Charger. Its controlled by Emerald ECU and has a lambda sensor wired in to ECU. Its been running fine for about a year, but is now sounding like its pinking as if it was running on a distributor, is this possible given the current setup? I assumed probably wrongly that once tuned the ECU and Lambda sensor control all the parameters? It was mapped a few months ago upto 5500 rpm (new engine) and is probably due another session and oil change by now.

[OfMini&Men]

hows this feeding the engine?

 

Before charger or after charger?

[mini13]

pinking can only be eliminated on an ECU what has a knock sensor.

 

a couple of possibilities,

 

the fuel has changed recently, fuel companys often change the fuel in cold weather for easy starting, the stuff they add for starting is more pone to pinking and det. normally this wouldnt make a difference as the cold weather would pretty much offset the effect, but if you have a charger warming up the inlet charge, then the situation may change.

 

youve got a few miles on the engine now and got a build up of carbon in there which acts as an insulator and pushes cylinder temp up just a little, also carbon can glow red hot and cause pinking.

[jaydee]

i'd say, try high octane fuel and see if pinking disappear, today fuels burn with differnt timings, they change some additive and you wont know..

[maccers]

Cheers for the replies all. Its a draw through, ie fuel and air injected into the charger then blown into the cylinder head. I use shell V Power stuff, have always done since engine was rebuilt. Its going for a re-map soon so will see if they can be ironed out.