|
Scion FR-S / Toyota 86 GT86 General Forum The place to start for the Scion FR-S / Toyota 86 | GT86 |
|
Thread Tools | Search this Thread |
10-26-2021, 05:06 PM | #1 |
Senior Member
Join Date: Oct 2014
Drives: 2013 GT86
Location: New Zealand
Posts: 109
Thanks: 3
Thanked 8 Times in 7 Posts
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
|
Cranks but won't fire
Hey team,
I have a supercharged (sprintex) GT86 running Ecutek. Car's been running great for years. But I only run it once a week, sometimes not even that. The other day I moved it out of the garage to clean it. I turned it on and drove it out of the shed a few metres. Turned it off. Cleaned it (inside) and then put it back. I was then away for the next 4 days. When I came back it wouldn't start. Cranks over, just no fire. I feel like there was a small stumble the first time like it was going to start but that hasn't happened again since. I get about 4 goes at starting it before the battery starts to die. I've tried starting it with jumper cables but that didn't help. In fact, the battery still went flat trying which I thought was a bit odd. Must take a lot of juice to crank it. I've tried starting it with my foot on the accelerator to the floor in case it was flooded. Although I think the fuel would have evaporated while I was away. I've tried spraying a bit of 'Engine Starter' in the intake, and into a vacuums tube before the supercharger. What is next? I'm wondering if running it so briefly might have fouled up my plugs. But I would have expected it to at least stumble or run rough with dirty plugs. Is this a common problem? |
10-26-2021, 05:11 PM | #2 |
Senior Member
Join Date: Aug 2014
Drives: 2013 FR-S
Location: Northwest Iowa
Posts: 7,354
Thanks: 454
Thanked 4,542 Times in 2,947 Posts
Mentioned: 59 Post(s)
Tagged: 5 Thread(s)
|
If it won't start on ether then you don't have spark. Check all your grounds of course then maybe sensors starting with crank position
Sent from my ONEPLUS A5010 using Tapatalk |
10-26-2021, 06:31 PM | #3 |
Senior Member
Join Date: Oct 2014
Drives: 2013 GT86
Location: New Zealand
Posts: 109
Thanks: 3
Thanked 8 Times in 7 Posts
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
|
I forgot to mention the Ecutek app isn't showing any DTCs. I would have expected something like a crank position sensor to report a fault code?
How does one go about testing the crank position? |
10-26-2021, 06:34 PM | #4 | |
Senior Member
Join Date: Aug 2014
Drives: 2013 FR-S
Location: Northwest Iowa
Posts: 7,354
Thanks: 454
Thanked 4,542 Times in 2,947 Posts
Mentioned: 59 Post(s)
Tagged: 5 Thread(s)
|
Quote:
Sent from my ONEPLUS A5010 using Tapatalk |
|
10-26-2021, 07:57 PM | #5 | |
義理チョコ
Join Date: Sep 2014
Drives: a 13 e8h frs
Location: vantucky, wa
Posts: 31,867
Thanks: 52,126
Thanked 36,517 Times in 18,919 Posts
Mentioned: 1106 Post(s)
Tagged: 9 Thread(s)
|
Quote:
If you don't want to go through the hassle of getting a charger, just swap batteries between cars. Otherwise disconnect the battery and, while it's out, step on the brake pedal for a few seconds. (brake lights) to drain the filter caps in the ECU. I suspect that the ECU got jammed up with the brownout you gave it the first time.
__________________
|
|
10-26-2021, 09:02 PM | #6 |
Senior Member
Join Date: Oct 2014
Drives: 2013 GT86
Location: New Zealand
Posts: 109
Thanks: 3
Thanked 8 Times in 7 Posts
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
|
The battery is a bit old and shit. I have a battery charger.. and I charge it up of course.
When it is charged up it will let me do continuous cranks until the ECU cuts off. And it will allow me to do that about 4 times before it starts sounding flat. But even if the battery was a bit crappy it should still start. I have no idea what you're talking about draining filter caps in the ECU.. or how these got jammed up. But I will try what you suggest! |
10-26-2021, 09:08 PM | #7 | |
Senior Member
Join Date: Aug 2014
Drives: 2013 FR-S
Location: Northwest Iowa
Posts: 7,354
Thanks: 454
Thanked 4,542 Times in 2,947 Posts
Mentioned: 59 Post(s)
Tagged: 5 Thread(s)
|
Quote:
Sent from my ONEPLUS A5010 using Tapatalk |
|
The Following User Says Thank You to Ashikabi For This Useful Post: | Ultramaroon (10-27-2021) |
10-26-2021, 09:22 PM | #8 |
Senior Member
Join Date: Oct 2014
Drives: 2013 GT86
Location: New Zealand
Posts: 109
Thanks: 3
Thanked 8 Times in 7 Posts
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
|
|
10-26-2021, 09:23 PM | #9 |
Senior Member
Join Date: Aug 2014
Drives: 2013 FR-S
Location: Northwest Iowa
Posts: 7,354
Thanks: 454
Thanked 4,542 Times in 2,947 Posts
Mentioned: 59 Post(s)
Tagged: 5 Thread(s)
|
|
10-26-2021, 09:42 PM | #10 |
Senior Member
Join Date: Oct 2014
Drives: 2013 GT86
Location: New Zealand
Posts: 109
Thanks: 3
Thanked 8 Times in 7 Posts
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
|
Yeah I've got a MacBook that I put Bootcamp on so I could run Windows for Ecutek. Not that I know my way around using it really. I only did that to load on the initial tunes. Not even sure if it can do such a test? Google isn't coming up with much.
|
10-26-2021, 09:48 PM | #11 | |
Senior Member
Join Date: Aug 2014
Drives: 2013 FR-S
Location: Northwest Iowa
Posts: 7,354
Thanks: 454
Thanked 4,542 Times in 2,947 Posts
Mentioned: 59 Post(s)
Tagged: 5 Thread(s)
|
Quote:
Sent from my ONEPLUS A5010 using Tapatalk |
|
10-27-2021, 01:03 AM | #12 |
義理チョコ
Join Date: Sep 2014
Drives: a 13 e8h frs
Location: vantucky, wa
Posts: 31,867
Thanks: 52,126
Thanked 36,517 Times in 18,919 Posts
Mentioned: 1106 Post(s)
Tagged: 9 Thread(s)
|
When in standby mode, the ECU draws so little that it can keep the memory floating on the energy stored in the power supply filter caps for quite a while. Stepping on the brakes drains them and ensures a full reset of the temporary learned stuff which can be corrupted by a brownout. Not saying that's it but at least you'll be able to rule it out. The effect is real. I've read about it here many times.
__________________
|
10-27-2021, 02:45 AM | #13 | |
Senior Member
Join Date: Oct 2014
Drives: 2013 GT86
Location: New Zealand
Posts: 109
Thanks: 3
Thanked 8 Times in 7 Posts
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
|
Quote:
Anyway I tried it and it didn’t help. After a few more goes with a bit of ether I managed to get one more very brief stumble.. a tiny something but nothing more. Last edited by tzbang; 10-27-2021 at 03:17 AM. |
|
The Following User Says Thank You to tzbang For This Useful Post: | Ultramaroon (10-27-2021) |
10-27-2021, 02:00 PM | #14 | |
義理チョコ
Join Date: Sep 2014
Drives: a 13 e8h frs
Location: vantucky, wa
Posts: 31,867
Thanks: 52,126
Thanked 36,517 Times in 18,919 Posts
Mentioned: 1106 Post(s)
Tagged: 9 Thread(s)
|
Quote:
Well, at least it's a hard failure somewhere. Sounds like you have spark. Do you hear the main fuel pump run when first turning on ignition? Fuses all good?
__________________
|
|
|
|
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
2013 Scion FR-S cranks but no start!!! | Btborja | Issues | Warranty | Recalls / TSB | 43 | 10-29-2023 09:30 PM |
Long cranks and engine struggling to start. Please help! | pakunodafie | Engine, Exhaust, Transmission | 17 | 09-08-2021 02:32 PM |
HELP! Cranks but won't start P0102 P0113 | Sum10clever | Issues | Warranty | Recalls / TSB | 2 | 09-05-2020 11:46 PM |
Car cranks but wont start | yablonskiy11 | Issues | Warranty | Recalls / TSB | 15 | 01-02-2019 12:18 PM |
It cranks but won't turnover | daironchef | Forced Induction | 2 | 05-31-2016 09:40 AM |