| Author |
Message |
Ross Pesina
DieHard
Vic
Soarer V8, Soarer T, Soarer TT, Supra TT.
Posts: 675
Reg: 08-2006
|
1991 TT soarer.
While my wife was on her way to work the other morning the car suddenly stopped. No warning as it was running fine up until it just cut out.
I installed a new fuel pump (stealth 340lph) a month ago but I can hear it running (bypassed fuel pump ECU at diag port).
I replaced the Ignitor with a working one from my other soarer and it still wouldn't start.
I check fault codes. 12 and 13 were coming up. So I replaced Both cam sensors and cleaned the plugs but the car still wouldn't start.
I then swapped ECUs, still the same problem. It cranks fine but won't fire. I pulled the codes again and only code 12 is coming up.
I then changed the crank angle sensor and still no improvement (code 12 still).
Any ideas? The car has been on the side of the road for a couple of days and it's starting to stress me out as I'm running out of ideas. |
Daniel Clarke
Goo Roo
NSW
TT 2.5L 6 cylinder
Posts: 7231
Reg: 03-2006
|
Check wiring for cam and crank sensors with multimeter at Ensor end & loom near firewall if you can .
Are you sure it has fuel ? Could always undo throttle body hose and try some start ya bastard if it fires not getting fuel |
Daniel Clarke
Goo Roo
NSW
TT 2.5L 6 cylinder
Posts: 7232
Reg: 03-2006
|
Also try disconnecting battery for Ecu reset to reset codes , see if it clears .
Sounds like no fuel ? |
Daniel Clarke
Goo Roo
NSW
TT 2.5L 6 cylinder
Posts: 7233
Reg: 03-2006
|
Oh and check for broken timing belt ! In case ..
Couple of 10 mm bolts for top front cam cover
Good luck |
Ross Pesina
DieHard
Vic
Soarer V8, Soarer T, Soarer TT, Supra TT.
Posts: 676
Reg: 08-2006
|
I put 20L of fuel in just in case. Has half a tank of fuel. I forgot to mention. We did a full service on it two months ago, so new timing belt, tensioners, cam, crank seals, etc.
I did check the timing belt and still looks new.
I had the battery disconnected for an hour so it has had ECU reset too.
Will trace the wiring tonight after work. |
Daniel Clarke
Goo Roo
NSW
TT 2.5L 6 cylinder
Posts: 7234
Reg: 03-2006
|
Bugger man ... Hopefully it turns out to be something silly .
Checked all fuses ? |
James Tims
DieHard
Vic
TT
Posts: 865
Reg: 11-2008
|
Could be a crappy sparg plug or coil pack...just my 2 cents, I always check them now since half my issues with my soarer have always led to that even though it will come up with something else entirely. |
Ross Pesina
DieHard
Vic
Soarer V8, Soarer T, Soarer TT, Supra TT.
Posts: 677
Reg: 08-2006
|
Yeah, after swapping ECUs I checked all fuses.
Coil packs as well as connectors are only a year old and changed spark plugs with major service.
Pretty sure I just figured it out. Managed to find a copy of the apexi sitc installation manual. It splices ALL 3 sensors (two cam sensors and crank). I bet it has packed it in and signal is not getting to the ECU. Will bypass it after work. I need to learn to check the obvious stuff first! |
Daniel Clarke
Goo Roo
NSW
TT 2.5L 6 cylinder
Posts: 7235
Reg: 03-2006
|
Ahh you never mentioned that was in the mix ! Lol |
James Tims
DieHard
Vic
TT
Posts: 866
Reg: 11-2008
|
Haha 99% this is the problem  |
Ross Pesina
DieHard
Vic
Soarer V8, Soarer T, Soarer TT, Supra TT.
Posts: 678
Reg: 08-2006
|
Bypassed all interceptors and still no joy 
I traced both cam sensor wires back to the ECU as well as crank sensor and all check out fine. Completely out of ideas now.
Still getting a code 12. |
Daniel Clarke
Goo Roo
NSW
TT 2.5L 6 cylinder
Posts: 7237
Reg: 03-2006
|
Low battery voltage ? Bad eArths somewhere ?
Tried jump starting ? |
James Tims
DieHard
Vic
TT
Posts: 867
Reg: 11-2008
|
Have you blown the main fuse for the alternator, I had this issue where I had blown that big 150 AMP fuse on the fuse box, the car was attempting to start but would never click over. Check that one out mate and the other's while your at it on the engine bay, I believe there are also some under the drivers seat but sounds more like an engine bay one. |
Ross Pesina
DieHard
Vic
Soarer V8, Soarer T, Soarer TT, Supra TT.
Posts: 679
Reg: 08-2006
|
Battery is only a month old and is what's specified for the soarer (huge and expensive). Battery has full charge (checked with multimeter) and it turns over perfectly fine. I even clipped on my battery booster / jump start pack which made no difference.
A few years ago I added extra earthing going from battery to motor as well as battery to chassis, so shouldn't be an earthing issue.
I will check the fuses again. Organising a trailer at the moment so I can get it home and have a better look at it. All I can think of is maybe the disc that signals the crank sensor somehow got damaged, but I find it unlikely as the crank sensor looks perfectly fine. I'll update as I find out more. |
Ross Pesina
DieHard
Vic
Soarer V8, Soarer T, Soarer TT, Supra TT.
Posts: 686
Reg: 08-2006
|
Car is back on the road today.
The trigger disc came off the key on the crank and got jammed. This meant there was nothing to trigger the crank sensor. We replaced it with a spare and applied preventative modifications and the car is running like new again.
I'll take some pics and do a more detailed writeup to better explain. |
Daniel Clarke
Goo Roo
NSW
TT 2.5L 6 cylinder
Posts: 7248
Reg: 03-2006
|
Wow ... Due to harmonic balancer not being tightened properly ? |
Ross Pesina
DieHard
Vic
Soarer V8, Soarer T, Soarer TT, Supra TT.
Posts: 687
Reg: 08-2006
|
Nope, harmonic balancer was tensioned correctly. Can't really explain why it happened, but looking at the way it sits by design, it's surprising it hasn't happened to more people. |
Shane Haverkamp
DieHard
nsw
soarer TT
Posts: 929
Reg: 10-2007
|
similar happened to me once.... except its because i forgot to put the trigger wheel back on |
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