R33 Starting Issue

[GotsWapan]

This has been a constant issue since I've had the car but it has never failed me to date.

Generally it take about 3-4 seconds of cranking over before my car starts no matter if its hot or cold. But sometimes it will start straight away, rarely.

My tuner told me this is common for some cars with aftermarket ECU's. My father thinks it could be the advanced timing and rich on start up but I'm unsure.

My ECU is a Wolf 3D V4 running a MAP sensor and fuel pump is an 044 and running Nismo 740cc injectors.

Feedback would be appreciated. As I stated the car hasn't actually ever failed to start.

Cheers

[GTSBoy]

Just the Wolf taking a moment to get its shit together.

[cuong nguyen]

i also think bigger injectors take a bit longer to kick over not sure though.

[Got a Pulsar]

Do you prime the fuel lines before starting? as in, turn the key til the fuel pump does it's thing and stops and then turn it further to start?

I installed an 044 intank and it has No non return valve so when the car sits for a while, the fuel seeps back into the tank.

If I try to start it straight away, yes, it takes 3 to 4 seconds to start but if I prime the lines, it starts right up, cold or warm.

This rarely happened with my stock pump but it didn't seem to have a valve on it either.

I just recently bought a non return valve to try stop this and will slap it in soon.

[Ben C34]

i also think bigger injectors take a bit longer to kick over not sure though.

nah. I have id725 injectors with nistune and car starts instantly. I also had a wolf 3d v4 10 years ago. It is an old computer....

[Dose Pipe Sutututu]

i also think bigger injectors take a bit longer to kick over not sure though.

that's crap, did you read this from some honda forum?

OP, are you running E85? in the cold it's a little bit of btch to start..

[GotsWapan]

I generally let it prime up for a few seconds then turn it over.

Just running 98 octane.

Thanks for the replies fellas

[Dose Pipe Sutututu]

I generally let it prime up for a few seconds then turn it over.

Just running 98 octane.

Thanks for the replies fellas

find a new tuner, seems he hasn't set the cranking enrichment table properly

[SargeRX8]

My car rarely starts first time. Well it starts then dies. Then starts just fine. Happened when stock and now when modified. I think my issue might be water temo sensor. It happens only when very cold.

[scotty nm35]

Mine does the same thing, it even ran today for a few seconds then cut out. Once restarted it is fine, although very doughy for the first 20 seconds or so. It's just so much ethanol getting injected and not enough petrol to fire the mix.

I am seriously thinking a dual fuel setup with petrol running off the stock ecu/injectors perhaps, and e85 on secondary injectors is the way to go, for economy, higher K's to the tank and improved starting in winter.

[GotsWapan]

Mine runs very rough for 20 seconds or so aswell. Coughs and carries on then its fine once it warms up a little