Saturday, November 29, 2008 - 03:17 am, by: Scott Rushing(Toyboy)
I thought I had read on here about someone bypassing the AFM and giving a fake reading on a newer Soarer. What was the mod and has anyone tried it on a 92 1UZ?
My SC was running bad when I would get on the gas, so I tried jumping the fuel pump ecu with the paper clip trick and it still ran bad. I disconnected the AFM and it ran perfect. So I'm trying to get around the whole $1k replacement especially since I want to go with a ITB setup eventually.
Saturday, December 13, 2008 - 03:13 pm, by: Brett Harrison(Bretto)
I'm having this same problem at the moment. Just because you disconnect the afm and the car runs well, doesn't mean there is anything wrong with the AFM. I saw a post on Soarer world about this aswell, and it turned out to be the plugs and leads, which doesn't make any sense, but anyway.
Currently, my car is very lethargic until about 3.5k, then it hammers. without afm, it just takes off, wheel spin, and keeps going until redline, it feels like you have just gained 50 % engine capacity. plug in the afm then back to slug again, very annoying.
Spent time on the dyno yesterday, rigged up and tuned an emanage blue. Car made 156.6rwkw, which fairly healthy. Despite this, upon removing the afm, the car felt a whole lot better, would wheel spin very easily, and is very quick just of idle, much more responsive, revs smoother etc etc.
Now.. then changed to an AFM, which I new worked. just the same. put new coil packs in. just the same Bridged the fuel pump. the same.
Now I don't think It could be plugs, or leads. these aren't that old anyway. but removing afm can't effect these hardware components, or can it. I did remember Neil G saying removing the afm allowed car to drive with faulty coils, and hence I changed them.
Removing the AFM is changing other things, apart from having no temp sensor, air flow signal. Perhaps, disguising a faulty ecu, as now the ecu is just using preset maps, and not having to calculate ??? not sure on this one, just a hunch. But that will be my next trial, Although my gut says its something more simple.
Saturday, December 13, 2008 - 07:18 pm, by: Sean Routledge(Stircrazy)
When you disconnect the AFM, are you disconnecting the plug on the outside of the intake piping, in between the air box and hose? I tried this today and my Soarer would barely idle?? Mine's a 95 model though, so i've heard there's some differences.
Saturday, December 13, 2008 - 09:02 pm, by: Luke Middleton(Spook)
I have had the exact same issues when I run mine on regular unleaded. It will miss and carry on at idle through to mid RPM. Once the revs get passed mid way, it runs fine. I have swapped AFM's - still the same (have one for sale if anyone is interested) When I run it on 98 ron, it's perfect. On 91 and 98 ron, my fuel consumption was crap - lucky to get 400 out of a tank. I replaced both oxygen sensors and can now get around 500 to a tank. Have not tried it on regular unleaded since I replaced the sensors. Will have to give it a try.
Sunday, December 14, 2008 - 02:28 am, by: Brett Harrison(Bretto)
Ok, so basically replaced the whole ignition system bar the ecu. still the same, igniters, coils, plugs, leads everything. guess what still the same.
But missed the glaringly obvious, the Emanage. As soon as it is unplugged the car is fine.
As far as I can tell the emanage isn't showing any faults, and is running fine. All the parameters were setup by Cihan, so can only assume that side of things is correct. However this engine was never listed by Greddy, so it is probable that it runs the engine, but just not very well.
Sunday, December 14, 2008 - 05:26 pm, by: Sean Routledge(Stircrazy)
Ok, gave it a try. Didn't seem too bad when cruising, still a bit rough but when I put my foot down I had NO power at all. Plugged it back in and drove home.
Sunday, December 14, 2008 - 07:52 pm, by: Brett Harrison(Bretto)
Ok to make this story longer, I just replaced plugs with brand new ones. The ones I replaced before were, newish from another car. the problem with doing things late at night, as no ones open.
Ok with brand new plugs, just copper BKR6E-11. The car is now perfect, idles and runs like a dream. Heaps of low end grunt. runs better than with emanage installed. I was tempted to try it again, and as soon as it is plugged in, the issue aRrises again.
Sunday, December 14, 2008 - 07:55 pm, by: Brett Harrison(Bretto)
Oh, one more thing.
It seems that by disconnecting the afm. that issues with the ignition system get masked. so dodgy coils, plugs etc almost get band aid repair.
Possibly alters spark power some how ??
But a very lengthy discussion on soarer world forum, and as i said above it turned out to be the plugs. So if your car runs better with afm disconnected I would be checking these basic items first.
Monday, January 05, 2009 - 02:32 am, by: Scott Rushing(Toyboy)
I forgot to add this when I first posted, I already did a full tune up. Looking back I installed a True Flow air filter before reading about the TRD filter on possibly another site. I think that the True Flow mucked up the AFM. I've been driving with it disconnected for awhile and I havent noticed anything negative, aside from the check engine light and trac off light are on. After removing the cats, and replacing the mufflers I can still bust out a donut in the parking lot at will.
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