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Post by atlex on Mar 20, 2022 19:09:50 GMT
time to buy a live chicken.
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Post by onepaintedman on Mar 20, 2022 20:03:50 GMT
time to buy a live chicken. 🐓 |
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Post by dadbif on Mar 20, 2022 22:46:21 GMT
time to buy a live chicken. I thought you slaughtered sheep…. |
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Post by scottydugg on Mar 21, 2022 11:44:54 GMT
Soooooo. Today it won't start again. Will turn and turn, but won't fire 🤬 Not had a chance to look back through and see what you've tried or if it's ran in the past, but fitted a Speeduino DIY-EFI to my 5 and been battling to get it to start repeatedly: Couple things I learned: Setting TDC, have you set your crank offset so it knows where TDC is? What's your dwell time? my base map had it set too high and killed a coil pack and plugs relatively quickly. Is the fuel pump priming on key turn? I had the wrong pin output, so could only start when jumping TEN/GND in the diagnostic box. Is the battery in good health? Might be worth jumping it off a second car. Does applying throttle help it start? If so back out the idle air screw a touch see if that helps. Anything more in depth than that, I'd be getting a remote tuner involved to check over your settings. |
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Post by atlex on Mar 21, 2022 12:13:55 GMT
100% a failed battery can appear good to start the car but won't get charged by the alt, so the longer you run it the more it needs to be recharged by another source..
back to basics now...
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Post by onepaintedman on Mar 21, 2022 13:08:08 GMT
Soooooo. Today it won't start again. Will turn and turn, but won't fire 🤬 Not had a chance to look back through and see what you've tried or if it's ran in the past, but fitted a Speeduino DIY-EFI to my 5 and been battling to get it to start repeatedly: Couple things I learned: Setting TDC, have you set your crank offset so it knows where TDC is? What's your dwell time? my base map had it set too high and killed a coil pack and plugs relatively quickly. Is the fuel pump priming on key turn? I had the wrong pin output, so could only start when jumping TEN/GND in the diagnostic box. Is the battery in good health? Might be worth jumping it off a second car. Does applying throttle help it start? If so back out the idle air screw a touch see if that helps. Anything more in depth than that, I'd be getting a remote tuner involved to check over your settings. This is really useful. Many thanks for the advice, it's much appreciated. I have been particularly worried about dwell time and dead time, so will check those again. It had new plugs and a new battery last time I couldn't start it (just after I changed the injectors to 425cc RX8 items, but maybe I've killed the plugs again because my Dell is wrong? Battery seems ok and output is what's expected (12.5v). Fuel pump primes ok. Will check tdc and recheck/realign CAS though and adjust idle screw if all else seems good. |
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Post by dadbif on Mar 21, 2022 22:11:42 GMT
Did you change the injector settings after you fitted the new ones?
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Post by onepaintedman on Mar 22, 2022 6:04:41 GMT
Did you change the injector settings after you fitted the new ones? Injector size and required fuel was reset. I can't remember if I applied a correction to the fuel tables, as it was a couple of years ago now, however the car was driven for a couple of months before I started to have starting issues and the car was parked up so I'm assuming I did at the time. I'm wondering if my priming and ase fuel values may be out of whack though. |
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Post by dadbif on Mar 22, 2022 8:37:48 GMT
Failure to start is quite often down to your cranking pulse being out. As suggested above try giving it a bit of throttle, if more throttle helps it start then you have too much cranking pulse, basically flooding the engine. You only have to alter the cell that is live in Tunerstudio when testing, then alter the rest accordingly once it runs. Have you had a read of this? Since it was running before it can’t be much. www.diyautotune.com/support/tech/other/megasquirt-startup-tuning/ |
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Post by onepaintedman on Mar 24, 2022 13:51:34 GMT
Why won't you start you *basket*!  |
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Post by onepaintedman on Mar 24, 2022 14:13:32 GMT
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Post by onepaintedman on Mar 24, 2022 14:25:04 GMT
Pulled spark plugs again - tips are covered in dry black soot. Too much fuel, or weak ignition? Over advanced ignition timing (defo need to check that)?
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Post by scottydugg on Mar 24, 2022 14:48:36 GMT
Check your timing first, it'll crank for days unless you get it set. if your battery is toast get some jump leads and a second car. When setting mine, I disconnected the injectors, coil pack and pulled the plugs to get it to crank faster so the timing light could register. Then you re-check once it's running.
Although you've got a trigger offset of 4.9 already, so has it been set previously?
Has the battery been charged?
If you've got fuel and spark, I'd check timing and battery.
Give your plugs a clean.
Your dwell seems fine, inline with what I have.
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Post by onepaintedman on Mar 24, 2022 15:36:26 GMT
Fully charged and ok battery. Timing was previous set, but I have replaced the CAS and forgot to mark it, so that is probably not correct (which may also explain the sooty plugs - which I cleaned whilst they were out).
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Post by scottydugg on Mar 24, 2022 16:41:24 GMT
I'd start with resetting TDC so it knows where TDC is then, if you can't get it to crank fast enough you might have to try the jump lead route.
Cranking off the battery, I didn't have enough juice, but then my battery pretty much had prarrie canoe it's pants by that point.
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le sigh
Jul 15, 2023 20:03:52 GMT
le sigh
Jul 15, 2023 20:03:52 GMT