Have I maxxed out the 044 pump?

[V8hilux]

Automagically is what I need.

perhaps a new table that I could tick that says "always give desired afr regardless of temperature or volts" lol.

[V8hilux]

new alternator is in and seems to have more volts after a quick start up. then laptop went flat and fuel tank empty.

symptoms were low volts when cold 12.6-8, then 13.2 warm, then 12.8hot. which means I can't use those compensation tables to repair the leanout when hot even tho the volts drop when hot too. makes it too rich when cold.

if my new alternator can keep the volts more steady while super hot, I might have a fighting chance by fudging the inverse temperature term table in the higher temps. If all else fails... I might even try setting up the "cold engine" maps from zero up to 80c and have a rich table for hot engiine afr's. You have to make large changes to the inverse temp term map in the high temp areas to gain only a small change in afr. ie going from 80 down to 1 nets around 1afr or a bit more.

[vlad01]

just get the injectors tested by The1.

if will save you all the hassle. AFR will stay stable regardless of voltage, then its will be just a matter of getting your coolant temp inverse table sorted.

[The1]

fudging always comes to bite.

[V8hilux]

Yeah I won't disagree with that. However I think I have other problems with the wiring too that won't be helping, and might be causing volt changes that are going un noticed by the ecu.

Ever since swapping the diesel engine for the petrol v8 there's been an issue with dull dash lights when turning the key on 2 clicks. the oil,brakes,etc. so dull I can hardly see them.

The new alternator is showing 14.3 volts at battery but the ecu is only reading 13.2 for some reason. I've got a feeling I fed the ecu it's ignition power from the old wire that went to the diesel injector pump kill switch solenoid and I think that wire comes from either one of 2 black boxes that sit in the engine bay right beside my turbo manifold and all the other ecu,ignition module wires, ignition wires etc are all clumped together just behind the down pipe from the turbo and they get extremely hot in there too.

So many symptoms..... lol.

[V8hilux]

if there's 14.3 at the battery, I should be having the same at ecu and on the logs? or is it normal to have lower volts at the ecu?

[Jayme]

I would at least be running a new power wire direct from battery through a relay and run your ign wire to trigger it. ive had bad results in the past just finding an ignition power and using it directly.

[V8hilux]

Thanks Jayme, I'll get onto it.

[V8hilux]

Fixed the dull dash lights by running a large earth from block to body as it didn't have one. And changed the injector to .047 with the double fire and now its got plenty of juice!

The downside is i still havent maxxed out the 044 pump. Someone said they are good for 700hp and im at 15psi and 6000 rpm with 80% duty cycle so that would put the engine around 560hp. Sound right?

Thanks for the help once again.

[Jayme]

what AFR on your wideband at 15psi ?? thats a LOT of fuel you are feeding it, it must fly!

even if fairly rich, 80% duty cycle of 80lb deka injectors should in theory be over 700hp worth of fuel you are dumping in. does it wheelstand? lol