| Author |
Message |
Mike Biggs
TryHard
^ I am not a TryHard! Stop teasing!
GT-TL
Posts: 136
Reg: 07-2005
|
Thanks for your input Neil...
I was driving it for about a week after getting it back from the paintshop after getting a new front put on...almost literally. They didn't need to touch the engine in any way as it was fine after the accident.
I noticed that it "missed" briefly one time straight after starting and driving down the road. Then it happened again later in the day, then everytime. I don't have the vented cover over the coils, and I found a coke can popper thing on top of one of the coils. The painter must have dropped it there. I though a coil might be shorted...but these have been replaced since.
In my opinion it must be the TPS due to the diag pointing to it still. ie: EFI41. I really need to get my hands on one to test. Manny sent me one, but it was the TRC sub-TPS.
Neil...whats the chances that it's wiring. Please say "Zero to none!" haha.
Could it be that the TRC is closing and cutting the engine? Feels like that. I've unplugged the TRC solenoids and sensors, and it still faults.
When your foot is on the throttle, the revs kind of bounce like the ICSV is faulty, but I've unplugged it and still faults.
Out of ideas. Any one want to buy a 200rwkw Soarer, that can't rev?...going cheap.  |
Mike Biggs
TryHard
^ I am not a TryHard! Stop teasing!
GT-TL
Posts: 137
Reg: 07-2005
|
Tried that Neil...as far as I know how. I unplugged the harness then reconnected the MAP sensor in and out wire. No change.
After sleeping on it...when I was testing sensors, I noticed that the TPS didn't make a change...if it was doing it's job, wouldn't something change when it was unplugged? Nothing changed. But the following things happened when I unplugged each of these sensors...
1. Throttle position sensor. -NO CHANGE
2. Traction control controller. -TRC error on screen
3. Traction control position sensor. -TRC error on screen.
4. Unplugged crank position sensor -Didn't start.
5. Unplugged idle control valve -Didn't idle
6. Unplugged MAP sensor -Started...just, then chugged real bad! Wouldn't rev above idle.
7. Unplugged SAFC2 and reconnected MAP sensor wires. -NO CHANGE
I've been thinking along the lines of the sensor providing a dodgy signal to the ECU therefor unplugging it would have eliminated the signal...but if it isn't providing a signal at all it the ECU, unplugging it won't change anything. Am I right thinking this?
Sorry to go on and on...just thinking it through.
I just want to  |
Chris Davey
TryHard
QLD
Corona
Posts: 232
Reg: 07-2005
|
So you haven't changed the TPS yet? If the CEL told me it was that, that would be the first thing I would swap. How hard is it to swap them over?
If you can get the car to my house in Kuluin I can lend you my TPS to see if it is any better.
Chris |
Shannan Jones
Tinkerer
WA
TT GT-TL
Posts: 25
Reg: 10-2005
|
Hi Mike,
I've been dealing with this problem for awhile. But really haven't got off my butt to investigate to deeply as car hasn't been registered.
The car rev's out poorly to 2000-2500 then coughs and hesitates, with some gentle throttle modulation you can sometimes get around it, but generally no power.
I don't have Traction Control so I can eliminate that from the list.
I have found that putting the Fuel Pump ECU into the bridge mode can *sometimes* get around it. Though I have tried a brand new ECU with no luck there.
I have tried replacing the coils, no joy.
I have tried replacing the sparkplugs, no joy.
So from my end we can eliminate:
TRC
Fuel Pump ECU
Coils
Sparkplugs
Anything I can do to help out the diagnosis please drop me a line |
Mike Biggs
TryHard
^ I am not a TryHard! Stop teasing!
GT-TL
Posts: 138
Reg: 07-2005
|
Chris: Usually as soon as the diag said a sensor is dead I'd swap it out...but I was told it was unlikely the TPS had failed, plus I couldn't find a 2nd hand one or a new one. Thank so much for the offer, but I can't even get that far...plus I just found a brand new one in Penrith. Being sent now. Thanks so much for the offer of help...I may take you up on it yet.
Shannon: Looks like I'm not alone. Does your diagnostics show the EFI41 error, or any other errors? My fuel pump ECU bypass did nothing too, or coils. Do you have an Apexi SAFC2? How and when did it start to fail?
HOPEFULLY this new TPS arrives before the weekend and it solves it.
Are TTs meant to have a TE2 pin in the diagnostic port? I'm trying to do the advanced diag where you start the car and and it tests all the systems while the engine is running, but the pins needed are TE2-E1,instead of the usual TE1-E1. I don't have a TE2 pin...only in the cabin diag port maybe? |
Shannan Jones
Tinkerer
WA
TT GT-TL
Posts: 26
Reg: 10-2005
|
Stock setup, no SAFC, or interceptors of any kind.
Failed ages ago, but nothing touched in the engine bay that could have triggered it, car was left sitting for awhile, undriven.
Only change between working fine and stuffed was the removal of the fuel tank and exhaust system. |
Peter Nitschke
JunkFilterer
South Australia
GT4.0 V8
Posts: 2921
Reg: 11-2004
|
Shannan, that could point to either blocked cats or blocked fuel filter perhaps? |
Mike Biggs
TryHard
^ I am not a TryHard! Stop teasing!
GT-TL
Posts: 139
Reg: 07-2005
|
Mine was sitting for a while too...like 5months. But I started it every week, and it drove perfect for the first week after getting it back on the road.
The plot thickens!
How would I test if my cats were blocked or my fuel filter is blocked? It's not acting like it's starving for fuel, and it doesn't labour at all, revs freely to 2000rpm but stops there and drops.
Also ...mods that might be an issue on mine...
-440cc 2JZ injectors
-Pod filter
-5inch cannons
-SAFC2 - not yet tuned on dyno
-Hybrid 600x300x70mm Intercooler with metal pipes.
-running about .7BAR boost |
Shannan Jones
Tinkerer
WA
TT GT-TL
Posts: 27
Reg: 10-2005
|
2x Brand new Cat, and 2x fuel filters in this time.
Two more causes elminated
Process of elimination here, will wind up spending thousands finding a component worth 10c to be the issue |
Peter Nitschke
JunkFilterer
South Australia
GT4.0 V8
Posts: 2922
Reg: 11-2004
|
2 x fuel filters? |
Don Bagnall
Moderator
New Zealand
1991 UZZ30 GT4.0 V8
Posts: 2026
Reg: 05-2005
|
To be sure! To be sure! |
Peter Nitschke
JunkFilterer
South Australia
GT4.0 V8
Posts: 2923
Reg: 11-2004
|
Like a hole in the intercooler? |
Mike Biggs
TryHard
^ I am not a TryHard! Stop teasing!
GT-TL
Posts: 140
Reg: 07-2005
|
Pete? What do you mean hole in the cooler? |
Shannan Jones
Tinkerer
WA
TT GT-TL
Posts: 28
Reg: 10-2005
|
2x compliance = 2x replacing the fuel filter |
Mike Biggs
TryHard
^ I am not a TryHard! Stop teasing!
GT-TL
Posts: 143
Reg: 07-2005
|
Just got the price on the brand spanking new genuine Throttle Position Sensor...$136.95 including express post. Not too bad I thought.
Penrith Toyota have always helped me out...and I'm in QLD!! Slack local dealers!!! |
Mike Biggs
TryHard
^ I am not a TryHard! Stop teasing!
GT-TL
Posts: 144
Reg: 07-2005
|
Peter Nitschke wrote on Wednesday, January 11, 2006 - 06:05 pm:Like a hole in the intercooler?
Can this kind of thing be caused by a vacuum, or in this case, pressure leak??? Surely not... |
Peter Nitschke
JunkFilterer
South Australia
GT4.0 V8
Posts: 2924
Reg: 11-2004
|
Guys, I was just thinking outside the square and if the front of the car was repaired, then what is the chance that they somehow punctured the intercooler? Certainly it wasn't a serious suggestion, but it looks like you are running out of all the standard issues, so it might be something totally unexpected. Perhaps? |
Shannan Jones
Tinkerer
WA
TT GT-TL
Posts: 29
Reg: 10-2005
|
Hi Peter,
I had no front end damage, and intercooler & pipes never touched, have checked them also for being loose.
Got a feeling it is some sort of sensor error. |
Mike Biggs
TryHard
^ I am not a TryHard! Stop teasing!
KikArs TT
Posts: 145
Reg: 07-2005
|
Well I did bend the crap out of the factory intercooler, but it has since been replaced with a front mount with entirely new hoses and pipes. My BOV was so LOUD after putting it on...could I have broken the BOV and now it is open all the time and letting air out of the engine???
...but then again I still have diag telling me its a sensor.
What's your diagnostics screen saying Shannan??? |
Shannan Jones
Tinkerer
WA
TT GT-TL
Posts: 30
Reg: 10-2005
|
Haven't run diags in months, can't remember what it said.
I'll try and get off my butt tonight and see what it says. |
Mike Biggs
TryHard
^ I am not a TryHard! Stop teasing!
KikArs TT
Posts: 150
Reg: 07-2005
|
Ok guys...finally received and installed the brand new genuine TPS.
It made no difference!
I ran the advanced diag and started the car, made it error, and it came up with the "Engine electrical system" error.
The normal diagnostics is still saying "EFI-41".
I'm lost guys... where do I go from here?
The SAFC2 throttle wire is still attached via a T-piece connector to the original wiring just before the ECU. I am not sure whether this may be intercepting or blocking voltage from the ECU. The SAFC2 is still showing good voltages when key is in the ignition, at idle and at full throttle. So the SAFC2 is getting a correct voltage...so the wiring up to there is fine.
How do I check the resistance of that wire?... where's it originate? Is it directly run from the TPS...which of the 4 wires is it?
Am I thinking correctly???
I'll be picking up my new Subaru WRX soon, so I need to get the Soarer going so it can be...sold...I don't want to really...but I got a good deal. |
Chris Davey
TryHard
QLD
Corona
Posts: 263
Reg: 07-2005
|
Hmm. I would think that as long as the SAFC is spliced into the original wire then it would be receiving the same signals as the ECU. I don’t think anyone would be silly enough to take the TPS signal away from the ecu to send it to the SAFC instead.
Isn’t there pages online somewhere that show you how to troubleshoot different error codes? I thought I saw them on www.mkiv.com or www.mkiv.co.nz .
I am pretty stumped though. |
Mike Biggs
TryHard
^ I am not a TryHard! Stop teasing!
KikArs TT
Posts: 151
Reg: 07-2005
|
I don't think the SAFC is completely stealing the TPS signal from the ECU, but I think it could be interfering. When I first put the new TPS in the SAFC showed no movement on the TPS at all. I tried the old one...no movement. I went and fiddled with the SAFC wire, and then it appeared.
I know all the codes...EFI41 is TPS, and the japanese writing says "Engine Electrical Error"...AKA the horrid EEE.
I have replaced the cam sensors before with second handies when I had the EEE, but the symptoms were different. Whats the chances the EFI41/TPS error is masking something else and isn't the real problem?
Anyone got any ideas???... |
Benjamin Burgess
TryHard
NSW
Toyota Soarer GT-TL
Posts: 184
Reg: 07-2005
|
TPS signal could be intermittent, this can trigger the error code. Checked all the wiring? |
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