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Holley EFI experts

I know nothing about these EFI systems.

Bought a boat with one, have not had it on the water yet.

Back in in August I started it on the hose, fired right up.

Went to winterize a couple months ago and it wouldn’t start. Haven’t touched anything on it, didn’t even add fuel.

Have spark, can see fuel being sprayed when cranking (but not at wot).

Where red I I start, what other info can I get to help anyone give me any direction?

Thanks for any help!!

The issue with fuel not being sprayed at full throttle is OK. At some point around 3/4 and above throttle position is usually set up as a clear flood in the program.

The no start issue at winterizing maybe a bad combination of IAC position and cranking fuel for starting. If the motor has not been setup or tested at the temperature you tried to winterize at. I'm assuming it was much colder than it was in August.

Which Holley system is it?

You should not have to touch the throttle to start it. Leave the throttle at idle and turn the key. IF you think that you somehow flooded it than HOLD the throttle at about 3/4 setting ( don't move it until it fires ) and crank if for about 10 seconds. IF it doesn't fire than you are going to have someone that has the ability to plug into it with a laptop.

Quote:

Originally Posted by kvogt (Post 4666389)

that makes sense to clear out flooding. I have the computer ad cords, any idea what IAC should read?
Temp could be an issue, it was a Florida boat before so it probably wasn’t run in cold, engine coolant temp was probably 40 degrees when we went to winterize vs 75 I would guess in August.

Quote:

Originally Posted by Texascuda (Post 4666407)

Which Holley system is it?

Trying to not sound like an idiot but no idea. It’s a throttle body system, self learning with o2 sensor and was bought new in 2011 if I understand correctly from previous owner.

Quote:

Originally Posted by Tinkerer (Post 4666410)

I was trying anything I could at that point, yes it should be touch key and go.

where do you live?
you may want to try a 100 watt light bulb in the bilge,keep hatch down,,get some heat in the engine compartment.then try and start it.cold starts usually need to be tweek alittle.most don't tune for cold weather or aren't tuning when it does get cold.
I got lucky 1 year,came out and it was 30°,sat there w/ the laptop and worked the cold weather start.
good luck,don't crank to long and use a battery charger if need,to keep the batteries up.

I had that happen with it to cold out flooded engine before it would even kick once tempter enrichment was way to much for the temp. See if the spark plugs are wet.

You might want to pull a few plugs to see if you're flooded, if so, unplug the injector harness or fuel pump and crank the engine to clear it out. Connect up your laptop and WiFi and get someone to do a remote tune on your start up enrichment.

This is what I don`t like about EFI, computers, sensors etc all can fail,be trouble.
Carbs are simple, they work. I hope I didn`t just **** myself going the EFI route.

Quote:

Originally Posted by ICDEDPPL (Post 4666438)

This is what I don`t like about EFI, computers, sensors etc all can fail,be trouble.
Carbs are simple, they work. I hope I didn`t just **** myself going the EFI route.

Neither, are as easy as the salesmen would like you to believe when you're pulling out the charge card.