Fly

Hi Joe and welcome!! As skippy says Jurgen is your man for imports. Get yourseolf a club membership and have a dig through all the guides and information on buying a supra on the from page. It will be the best ten pounds you have spent.

Yea the na has map too. High opening rates can be control by the acceleration adjustment map with emu it was more the closed loop area I was concerned about but we will see. Cheers guys ANC sorry again for the long lost thread, I suppose this is what happens when older tech is used

Thanks mello, this has given me something to think about.

Even on the na?

rob, dont put your hg on the wrong way round!!

yea sorry Ricky to drag it up, having dug a little more i dont think my idea of the same voltage would work either as the stock ecu would try and trim that back to stoich or keep the ecu in closed loop longer. I did have another thought of using an aux output from emanage to the TPS wire on the stock ecu setting it to WOT all the time but then i dont know what other issues this would cause. As for changing the stock lambda value, surely changing my output voltages on my narrowband simulator would do the same? Anyway having had a chat with Noz and a rethink i am not sure the closed loop operation will cause me issues as i will be significantly leaner than stock until i hit boost so both the emanage and stock ecu will want to add fuel rather than trim it off in closed loop. Still i think being able to force the ECU into open loop is a much easier solution with a piggy. Thanks for your input here fellas i am just trying to soak up as much info as possible.

or setting a constant voltage / afr from the simulated narrowband to prevent the stock ecu from seeing fluctuating afrs and stop trimming the fueling?

sorry, to drag up a eight year old thread but i have been seaching and this seems to be the only one close! Firslty if you can get the ECU to go into open loop by fudging a signal somewhere is there any long term health issues that you would expect? From what i have read the ECu drives to a 12 ish to 1 afr in open loop but 14/1 in closed so you might reduce your MPG but mean that the stock ecu doesnt fight the piggyback in the area that would be closed loop normally. Secondly could a narrowband simulator be used and set to a constant voltage to force the stock ECU into open loop?

Thankfully I don't fix them looking at this

I fired a pm to raven too so hopefully his issue which has the same symptoms as mine did can be resolved...all I can put it down to is either rushing or being tired,,,,,, that age old saying cones to mind. Only two things come from rushing, trapped fingers and babies

Steve.m you are the winner.....hence the reason why six liters of oil found it's way very quickly into my expansion tank and radiator. Thankfully it didn't get into the bores , that all came out the head when I pulled it. The colour is due to a mixture of Fuchs Titan pro and toyota 4life.....very pink

Nope tt headgasket

Anyone else see the glaringly obvious issue here, I didn't the first time!! Raven has been informed...... Now for the clean up job and deck/head skim

Welcome to the club, there's plenty of information and people to ask questions of here

Can I send you my engine next?

A work of art

Evening all. I've had myself reading most of the day, on different sites about tuning. Anyway I've been looking into the different ways of how you develop a tune on your ecu by way of speed density (map sensor input for the laymen) or alpha n (TPS vs engine speed). I started looking over my emanage software and trying to build my understanding of the various maps, what they do, what options etc. I was looking over the injector maps and the drop down menus, you can select TPS,airflow pressure, greddy pressure sensor, relative pressure and absolute. So from what I was reading today and my limited understanding can someone confirm the scale and graph I am looking at here is effectively alpha n. Image below. The only benefits I see of using one over the other are when a small throttle change creates a huge air volume change that would cause the map sensor a head ache, such as itbs, so setting a duty cycle value against small throttle positions enables you to rough out a map without the map sensor? Another thing I've just thought of is the greddy pressure sensor selection shows volts against engine speed, how do you convert this to a known pressure ? Thanks again

have you got a bung in the nurspec, it changes the note of the exhaust and reduces the droning!

really liking the look of this, shes a cracker!!!

mate, get the head off and get it checked, whats the worst that can happen, you find its out of tolerance and have to then scrap it. You have the same symptoms as me my head is coming off on friday so will let you know if thats the culprit, might aid your diagnosis

june

Glad to see it's coming along, is it a standalone your running? Just wondering if it's another piggy if the stock ecu is seeing positive pressure somewhere and fuel cutting

Even on the na? Didn't see anything out of the ordinary there. I'm going to pull the head and get it skimmed and refit, fingers crossed for the second attempt, I probably should have checked it was flat, I naively assumed it's as fine when I pulled it so it would be fine being refitted.

Very true, I'm hoping we both can just flush the engine and retorgue the head to spec

Nope, she was running fine and there were no scores on the face, I only changed the gasket because of wanting to run higher boost. I'm certain the head obviously isn't torqued correctly and the oil pressure is forcing into the cooling lines. Just hope I can re torque the head and flush everything out and she will be fine.