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MS-2 does not restart
Posted: Fri Apr 28, 2006 8:31 am
by Philip Lochner
Here's the scenario:
I'm driving along in top gear (5th - manual) at say 2000rpm.
I then, without declutching, switch off ignition wait two seconds or so and then turn ignition on again. "Normal" cars would fire up and continue to drive as though nothing happened.
After doing this, MS-2 is NOT HAPPY, runs rough, no power, idles very low if I do declutch.
To correct, I have to switch ignition off, declutch, wait till engine comes to stop and then either start with starter or release the clutch on the move to "start" the engine again.
Is this normal for MS-2?
PS: Issues with IAC led to this
Posted: Fri Apr 28, 2006 8:35 am
by Bernard Fife
Philip,
It sounds like the baro enrichment is wacky because the engine is still spinning (because you didn't declutch) when you restart it.
Lance.
MS-2 does not restart
Posted: Fri Apr 28, 2006 8:50 am
by Ira
At 09:31 AM 4/28/2006, you wrote:
>I then, without declutching, switch off ignition wait two seconds or
>so and then turn ignition on again. "Normal" cars would fire up and
>continue to drive as though nothing happened.
>
>After doing this, MS-2 is NOT HAPPY, runs rough, no power, idles
>very low if I do declutch.
Think about how it get's normal air pressure reading. Adding a second
MAP sensor might cure the problem.
Ira
Posted by email.
Posted: Sat Apr 29, 2006 1:46 am
by Philip Lochner
lance wrote:Philip,
It sounds like the baro enrichment is wacky because the engine is still spinning (because you didn't declutch) when you restart it.
Lance.
In my native language we have a saying that if I translate directly to English would go like this:
"Pity that brains like these should rot"
I recon you've nailed the problem! Baro correction for my MS-2 is set to "Initial MAP reading" or something to that effect. With the engine spinning and 0 throttle that initial MAP reading is very low totally confusing MS-2. Another good reason therefore to fit the second pressure sensor for full time baro correction!
Posted: Sat Apr 29, 2006 4:09 am
by whittlebeast
Philip Lochner wrote:
"Pity that brains like these should rot"
A very smart friend once said to me "Andy, It's not that I am that much smarter than you, . . . I just have a three year head start on this subject."
We in the US hsve a saying "Been there, done that" Now that you know what the issue is, it would be easy to search for. But with no clue what the problem is, you have no idea what to search for.
AW
Posted: Sat Apr 29, 2006 4:20 am
by masterx81
Or can be added upper and lower limits on baro like in the extra firmware...
For my car i've preferred constant baro with second map...
MS-2 does not restart
Posted: Sat Apr 29, 2006 7:31 am
by Philip Lochner
whittlebeast wrote:Philip Lochner wrote:
"Pity that brains like these should rot"
A very smart friend once said to me "Andy, It's not that I am that much smarter than you, . . . I just have a three year head start on this subject."
But with no clue what the problem is, you have no idea what to search for.
AW
Wise words
Now, would it not be a good idea to include this handy piece of info in the Megatune manual and/or in the Megasquirt manual?
Kind regards
philip