Wild Idle After Sequential Upgrade
#4
Datalog wouldn't help much, since it all happens in the first 5 to 10 seconds and probably 100% fuel related. The LC-1 doesn't start recording for about 10 seconds after start.
Can you start a datalog before cranking? Didn't realize that if so. Good to know.
It's not bugging me too bad yet, so I haven't started messing with it, but here's my mode of thinking: When I switched to sequential injection from batch, the fuel is firing directly into the cylinder on startup instead of 50% of it ending up puddling on the back of the valve and splashing around landing on the inside of the intake manifold. When starting at 300rpm, the engine isn't producing enough vacuum to pull the fuel off the inside of the manifold and vaporize it properly. Chances are, my ASE values need to be a lot lower than with batch injection. Hearing from someone that's made the switch would be helpful.
Also, I flooded the motor after stalling the other day due to this issue. Had to hold the throttle open for flood clear.
Can you start a datalog before cranking? Didn't realize that if so. Good to know.
It's not bugging me too bad yet, so I haven't started messing with it, but here's my mode of thinking: When I switched to sequential injection from batch, the fuel is firing directly into the cylinder on startup instead of 50% of it ending up puddling on the back of the valve and splashing around landing on the inside of the intake manifold. When starting at 300rpm, the engine isn't producing enough vacuum to pull the fuel off the inside of the manifold and vaporize it properly. Chances are, my ASE values need to be a lot lower than with batch injection. Hearing from someone that's made the switch would be helpful.
Also, I flooded the motor after stalling the other day due to this issue. Had to hold the throttle open for flood clear.
#6
It's actually Cranking PW I need to change and not ASE. I have ASE taper of 2000 cycles for all temps, so that tapers over roughly 1-2mins and would show up for longer than the first 5 seconds of start. Cranking PWs are as I describe above with the pooling prior to start. ASE could probably also stand to be reduced a bit for similar reasons.
Thread
Thread Starter
Forum
Replies
Last Post
StratoBlue1109
Miata parts for sale/trade
21
09-30-2018 01:09 PM
Frank_and_Beans
Supercharger Discussion
13
09-12-2016 08:17 PM
JesseTheNoob
DIY Turbo Discussion
15
09-30-2015 02:44 PM