4age fuel issues

Me_19588 · Post by **Me_19588** » Sun Apr 09, 2006 7:42 pm

I have a blue top 4age in my ke25, it fires and runs for a few seconds then dies (runs out of gas as carrys on running with use of engine start) it is like only the cold start injector is working and it runs off that then once it stop it dies.

Is there any thing tha could be causing this?

crnkin · Post by **crnkin** » Sun Apr 09, 2006 8:02 pm

um no fuel.... no power.... too much fuel, not enough fuel, tired battery and dead alternator....

could be many things, make a list and work through it, your probly gonna have to spend a while and check everything. Most likely the fuel pump is where to look, but who knows

kingcorolla · Post by **kingcorolla** » Sun Apr 09, 2006 8:59 pm

check the the flow from the pump. It should gush out a mile a minute with the key on. Check condition of fuel filter.

Does it stall on idle? Will it sit on revs? What kind of sounds does it make when it dies? pop bang? Does it struggle and die? or just "nope no more run" Has it just started playing up or gradually? Have you had it running sweet?

Be very descriptive

cold start injectors only operate on cranking

Caveman · Post by **Caveman** » Mon Apr 10, 2006 12:31 am

Cold start injectors operate when cranking and when the water temp is below 35 degrees, thats what the brown water sensor is for.

Anyway seems like you have a shitty fuel pump, might want to replace it. Also could be a faulty MAP sensor. I know when I forget to plug it back in it has the same symptoms as yours.

Me_19588 · Post by **Me_19588** » Mon Apr 10, 2006 5:54 pm

fuel pump works fine in my 2tgeu te71 no fuel issues at all.

There is definity fuel in rail, but will check pressure with a pressure guage when i can borrow one.

kingcorolla · Post by **kingcorolla** » Mon Apr 10, 2006 8:43 pm

1998 wrote:Cold start injectors operate when cranking and when the water temp is below 35 degrees, thats what the brown water sensor is for.

No they only operate on cranking. Yes the brown sensor is a time control switch but only prevents injector pulsing on hot cranking compared to cold.

it is a cold start injector not cold RUN injector

85AW20v · Post by **85AW20v** » Mon Apr 10, 2006 9:52 pm

Sounds more like a wiring problem with the fuel pump only pumping when its cranking. There a main relay somewhere that keeps power to the fuel pump once the motor has started and the key isn't in the START position isn't there? As a temporay measure, try wiring the fuel pump up with power all the time to check it out. Can't remember how it all works but basically had the same problem when I put the 20v into my AW.

Caveman · Post by **Caveman** » Mon Apr 10, 2006 11:31 pm

kingcorolla wrote:
1998 wrote:Cold start injectors operate when cranking and when the water temp is below 35 degrees, thats what the brown water sensor is for.

No they only operate on cranking. Yes the brown sensor is a time control switch but only prevents injector pulsing on hot cranking compared to cold.

it is a cold start injector not cold RUN injector

I stand corrected. Kingcorolla is right

Me_19588 · Post by **Me_19588** » Tue Apr 11, 2006 7:51 pm

pump still runs after engine stops, have checked fuel pressure and it is fine and remains constant after motor has stoped running.

RedMist · Post by **RedMist** » Tue Apr 11, 2006 8:02 pm

There is a common earth rail for all four primary injectors. You may find its a bad earth.

Or is the standard ECU injector trigger ground sourcing? In which case you are looking for a fault with a shared 12 volt line.

There is also a possibilty that flyback has destroyed the injector driver in the ECU.

l1ttle_d3vil · Post by **l1ttle_d3vil** » Wed Apr 12, 2006 10:52 am

try another ECU as that could be faulty. I got an ecu that does a similar thing.