Hi guys. I just got the car out from winter storage, and the car started instantly but can not hold idle so it dies straight away when cold. When the engine is warm, it tries to survive on 500-700 rpm for a some seconds and then stalls. it smells a lot of gas when it tries to survive on the low rpm. so I think gas is no issue. it tries to give more gas , and it smells.
When I press the gas/rev and release, the rpm comes down and stops @ 1000-1100rpm for a second, and then falls and dies. So the RPM does what it's usually does when you press in the clutch and set the gear in neutral when driving, or when you rev and then release. But it really struggles with holding the idle.
Below 2000rpm it sounds a little strange/uneven (like its not tuned/dialed in correctly), and the car vibrate/shakes a little bit. When i drive and the car is cold , and under 2000rpm it runs not so smooth. Everything above 2700-3000rpm (driving/idle) sounds tuned and even and everything seems ok. I can manually adjust the screw for idle but then i have to set it very high (1500rpm+) for it to stay there when engine is cold.

Engine is 99% stock, except for 850cc secondary fuel injectors and bigger twins. I have Power FC and datalogit.

Thanks in advance.

 

If it ran good before storage, what most likely happened during storage?
1. Gas went bad and or now has water in it.
At lease drain some fuel out(tank drain plug) to check for water. If low gas level, drain it all out and refile with fresh gas.
2. Plugs got oil/moisture condensation on them. Thus fouled.
Remove and clean plugs.
3. Injectors stuck due to not running for months. Check 1 & 2 first.

 

[Case Solved]

Thank you for the reply, but I was very sure that this was a map/ecu issue , hence me posting here. The issue is now resolved. The issue was none of the above. It was what I thought, an adjustment in the PFC mapping.

MY issue was too much fuel. The engine simply drowned in fuel in the 1000-rpm range. Reminder: I have stock engine with all the stock parts, except for 850 primary injectors and larger radiator.

The issue was resolved by using the PFC-Commander (this can of course be done with the datalogit as well) to lower the PIM Volt in the 1000rpm range. I first set it to 90% and the RPM increased noticeably from struggling and almost dying at 600rpm to stay steady on 1300rpm. I drove the car 10 kilometres to see if everything was working well and the rpm never dropped below 1000.
I then lowered the idle rpm by adjusting the main throttle idle screw. When I got it low to 900rpm I started the fine tuning. When I provoked almost choking the engine by driving in reverse in low speed and releasing the gear, or parking in very slow speed releasing the clutch so the rpm came down to 600rpm the car apparently drowned again. After a many parkings and reverse slow drving and stopping I was able to make it adjust itself from 500-600 rpm up top 850-950 rpm without dying. The final PIM Volt for my engine @ 1000rpm ended on 70%. I will also post the Leading and Trailing Ignition as well. Spark plugs are stock 7's and 9's.

I'll post pictures of where to find PIM Volt and my IGL/IGT map.

[Case Solved]