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Engine is hard to start

Posted: Tue Sep 05, 2006 1:26 pm
by sindre
driving with MS-II v.3.0 on a audi 10v turbo ignition and fuel

when it's cold it starts okay, but when it's warm so that the cold start enrichments not is there I have to turn it a loty before it starts. Is there somwhere I can give it more fuel to start(cranking)?

I also have trouble with driving on cold engine, it wont have high rpm, so that I use verry long time to get to driving speed in the morning.


And one last question... When the turbo spins but the engine will not have it, shall I tune ignition advance up or down?
(i get pressure, but no accelleration....)

Posted: Tue Sep 05, 2006 8:22 pm
by tebriel
do you have a wide band gauge to see what your fuel ratio is doing? those are all just tuning issues.
-teb

Posted: Wed Sep 06, 2006 9:00 am
by sindre
tebriel wrote:do you have a wide band gauge to see what your fuel ratio is doing? those are all just tuning issues.
-teb
So I have to do the warm start issue in VE? and yes I have WB.

Posted: Wed Sep 06, 2006 9:41 am
by Matt Cramer
Check the cranking table and warmup enrichments. You can tweak the warm-up so it's still active on a hot day.

Re: Engine is hard to start

Posted: Wed Sep 06, 2006 11:07 am
by ae1969
sindre wrote:driving with MS-II v.3.0 on a audi 10v turbo ignition and fuel

when it's cold it starts okay, but when it's warm so that the cold start enrichments not is there I have to turn it a loty before it starts. Is there somwhere I can give it more fuel to start(cranking)?

I also have trouble with driving on cold engine, it wont have high rpm, so that I use verry long time to get to driving speed in the morning.


And one last question... When the turbo spins but the engine will not have it, shall I tune ignition advance up or down?
(i get pressure, but no accelleration....)
- hard starting can be affected by Cranking RPM, After Start Enrichment, Cranking Pulse, Priming Pulse width, Warm Up enrichment. *** Read these areas again.

- cold engine with a low rpm - DO you run an idle stepper? If not you can play with timing, and fuel to compensate for this behavior.

- If turbo spins and engine will not have it. SOMETHING is not right. Carefull. You need a wideband and preferably and EGT if you want to tune by the seat of your pants. Generally ignition advance is pulled back as boost comes on.

Posted: Wed Sep 06, 2006 11:36 am
by tebriel
can you explain what your wideband is saying during those moments of power loss? it's either too rich or too lean :)

Posted: Thu Sep 07, 2006 11:08 am
by sindre
thanks for all answers!

turbo spin but engine will not have it:
to much fuel in warm up...11 afr is to much :idea:

warm up and warm start:
what should be in "number of ignition cycles"? what does it do?

it's still hard to start when it is warm....


i do not have an idle stepper

Posted: Fri Sep 08, 2006 2:12 pm
by sindre
sindre wrote: what should be in "number of ignition cycles"? what does it do?
I repeat my self. default is 350 :|

Posted: Fri Sep 08, 2006 5:55 pm
by ae1969
can you post your msq file