Idle issues

scirocco_per · Post by **scirocco_per** » Tue Jul 25, 2006 11:45 am

The engines idle only runs at 1500-1700rpm, if i try to lower it then it will go up and down and later die.

When i drive the car on the road it´s working wery well.

MSQ file http://www.scirocco53.net/download/Etanol3.msq
Datalog http://www.scirocco53.net/download/datalogEtanol3.xls

superchargingmachine · Tue Jul 25, 2006 11:51 am

Are you using any kind of idle control?

If not, try setting all the bins in the idle area of the VE table to the same value. I also do this same thing with my spark table and it helps with idle stability but it is not 100% necessary.

scirocco_per · Post by **scirocco_per** » Tue Jul 25, 2006 12:00 pm

Yes I have try to using 2-wire Bosch idlecontrol but now i have disconnect it.

And i have the VE and spark at the same value but when the engine comes below 1500rpm it dies

superchargingmachine · Tue Jul 25, 2006 12:12 pm

What are the minimum and maximum MAP and RPM Bins for your VE table? If you can do a screen capture of your VE table it would be helpful.

superchargingmachine · Tue Jul 25, 2006 12:14 pm

Also, check your PW at 1500-1600. If it goes below 1.0 you need to reduce the number of squirts in the basic setup screen. I had a similar issue on decel with 440cc injectors.

scirocco_per · Post by **scirocco_per** » Tue Jul 25, 2006 12:36 pm

I have connect fuel pressure regulator to the system so i have lower fuel pressure at idle. Befor I have 1,5 PW and now 2,5PW but it is same with the idle.

superchargingmachine · Tue Jul 25, 2006 1:40 pm

What is your injector open time and what is your fuel pressure at idle?

scirocco_per · Post by **scirocco_per** » Tue Jul 25, 2006 10:17 pm

superchargingmachine wrote:What is your injector open time and what is your fuel pressure at idle?

Injectors open time at idle 3,8ms (1600rpm) and 3,2bar (46,4PSI) fuel pressure at idle.

Check my Datalog at http://www.scirocco53.net/download/datalogEtanol3.xls

superchargingmachine · Wed Jul 26, 2006 5:07 am

The first thing I noticed is your TPS is not working or not calibrated. But, I don't think this is all of your problem.

What have you tried with regard to adjusting VE's up or down? I would try droppoing VE's at idle by maybe 5-10% and log that to see the effect.

snillet · Post by **snillet** » Wed Jul 26, 2006 7:18 am

You should know that on a warm engine ,having to rich ve-bins at idle the idle will be high, and on ethanol the effect of over enrichment is not as evident as if you run on gasoline.

So the engine might run very well at idle but you can´t get the rpm:s down.

The answer is in "moonshining" (hemmabrännare på jänkespråk) smell in the exhaust

subie4me · Post by **subie4me** » Wed Jul 26, 2006 10:14 am

I see that you are running 1.0 ms delay and 50 % pwm. You might try increasing those a bit. Too low will cause idle problems.

scirocco_per · Post by **scirocco_per** » Wed Jul 26, 2006 9:56 pm

subie4me wrote:I see that you are running 1.0 ms delay and 50 % pwm. You might try increasing those a bit. Too low will cause idle problems.

But I run low impedance injectors?
I have read the manual:

If you have low impedance injectors (less than 4 Ohms), set the:
PWM Time Threshold to 1.0 msec, and
PWM Current Limit to 75%(30% if you have installed the 'Flyback Board' daughter card).

If I lower the PWM more than 50% the engine stops, how hight can I go up?

scirocco_per · Post by **scirocco_per** » Wed Jul 26, 2006 10:10 pm

Lance

But should I have 75% or 30% PWM I have MS1 V3.0 card

Do you have idea what I should do??

subie4me · Post by **subie4me** » Thu Jul 27, 2006 10:36 pm

scirocco_per wrote:Lance

But should I have 75% or 30% PWM I have MS1 V3.0 card

Do you have idea what I should do??

If the delay or the pwm is too low , it will cause an erratic idle , but it will run better at higher pw's. I have seen this happen. If you have a v3 board, then you should be able to run the pwm very low. Try increasing the delay a bit. You won't hurt anything at idle.

scirocco_per · Post by **scirocco_per** » Fri Jul 28, 2006 6:23 am

Datalog http://www.scirocco53.net/download/datalogEtanol4.xls
MSQ file http://www.scirocco53.net/download/Etanol4.msq

I try to adjust the PWM settings to day but no successful

superchargingmachine · Fri Jul 28, 2006 6:50 am

Have you tried to get your car running on gasoline? This might make troubleshooting easier.

Then I believe you can just scale the VE after that for the difference in AFR. You will need to search the threads that have E85 in the subject to find out exactly. I hope it wasn't more than 6 month ago. But, at one time there was alot of dicussion about using E85 and how to switch from one to the other. There was even discusion of how to implement the sensor GM uses to adjust for different ratio's of gas to alcohol.

scirocco_per <scirocco53@gmail.com> wrote:

Datalog www.scirocco53.net/download/datalogEtanol4.xls
MSQ file www.scirocco53.net/download/Etanol4.msq

I try to adjust the PWM settings to day but no successful

VW Scirocco 1900cc with Eaton supercharger 11psi in boost and E85 fuel (ethanol) 399cc injector

MSnS-E V3.0 code Extra 029q2 Edis4

www.scirocco53.net

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