4AGE wont start. No idea what to try next.

[takai]

The other thing is that the Smallport and GZE injectors are different impedence. Given that the ECU is set for a supercharger it may be set for GZE impedence injectors.

[Granto]

So you are actually using 2.4 Ohm injectors? Because if you are using high impedance ones you'll be getting very different behaviour.

I'm actually using 3 ohm injectors. But the website for EMS says 3ohm resistance = set to 2.4 so that's right anyway. which is weird. I thought that GZE injectors would be different (as that's what it's from, a 4agze)

I think you need to set the engine to TDC Comp. and refit the dizzy and start again. This way you KNOW it isn't out by a tooth and it must start with this setup. You just give it a tiny bit of advance by eye (so that it's not set to 0°) and try to start it.

Yeah I guess I should do that. argh. pita

[Granto]

hrm wow.

i reset the dizzy etc to TDC and all of that

and now i go to start it, and adjust the dizzy, and it makes massive backfires. and by massive, i mean, my staffie/terrior cross is now hiding under my bed for fear of his life. HEH.

is setting the dizzy the same on a smallport as a bigport? i'm going off the engine manual from the ancient repository of knowledge (tm stargate) from here. and did it that way. (which means @ TDC it points to 1st cyl, RIGHTT?!?!?!?!)

I dont know maybe it's right and the timing is just wayyy out, I went to set the timing but my timing light isn't seeing anything. I think I just need to get some whiteout and put it in the little crevis (which seems to have grown to a bigger crevis!)

Grant

[takai]

So now we know that there is fuel and spark. I cant remember how to set to TDC on a bigport dizzy, but isnt there simply a notch in the casing and a longer tooth on the dizzy? There is on the smallport.

[Granto]

well, i found it a bit odd, co si double checked the manual and it seems like I put it on right... howeverr..

when spinning the dizzy by hand.. the injectors fire right (u can hear them clicking) but it doesn't spark all the time.. like, it will spark, and you can hear some weird popping sound around the coil or the dizzy cap.. i'm not sure where, it's weird.

it'll spark a few times, and then stop.

Hrmm..

Edit:

okay changed coil and now it's okay..sparks etc.. howeverrrrr.. the injectors are all firing at once! ugh. that so makes no sense.

they all share the same power (red) and are paired to different trigger wires (white and yellow) however, .. they seem.. while spinning dizzy with hand.. to be firing at the same time! gr.

[Granto]

small update

i continued playing with the dizzy (spinning by hand) and now i have all the sparkplugs firing right (there was a slight gash in the trigger wire that might've been hitting the earth, but that's fixed! ugh!)

however im using a 4ac coil which is meant to have a ballast resistor but running it without the ballast resistor! (thanks to steve for the donation!) however this could be the cause of my dramas.

the injectors seem to fire all at the same time, after some digging around on the AEM/EMS site, this seems normal. Even though they're wired to a different batch line. All injectors are firing though and all injectors are injecting fuel into the engine during cranking. I did the good ol' paper down the quad. they all got wet..

The dizzy is set to topdead centre, the timing isn't done yet, as though it should be good to set, I have no one around to crank the engine while I do the timing light !

The engine was cranking like it was sooo close before. argh!.. then I think the battery has run flat, as start is just clicking now.

Need to grab a laptop or another computer again to setup in the car to datalog n see what's up..

I have a feeling I would've gotten rid of the jumpy RPM.

Grant

(woah, i just came in from working on the car.. and as im writing this, it started to absolutely BUCKET down.. so.. for once i wasn't caught out in the rain )

[Kyosho]

Have you got an ECU file you can send?

[Granto]

ecu file?

how come?

[BeRad]

4 injectors at once is right with the ems the ecu doesnt suport batch fire, so they all fire at once.

i havnt played with toyota dizzys in a while but i found with my brothers when i was pulling my hair out the key on the dizzy pushes out toward the dizzy cap if its not in the cam properly causing it to be way out of timing. i dont know if this is possible with toyota dizzys but if you pull the cap off youll be able to see if its pushing the key back into the dizzy instead of slotting into cam.

[Granto]

oh it's definantly in the cam properly at TDC, my dizzy light dosen't seem to be wanting to work though now.

i ran a wire from the starter switch to a switch to 12v even with a 10A fuse hehe so i could have the key on IGN and crank the engine from the engine bay and set the timing. ah, it really nearly started (as per usual ) and i noticed that the ground wire gets insanely hot (from the battery to the chasis) as does the starter motor.

insaaaaaaaanely hot.

if i turn the dizzy at different bits it sounds like it's going to start but then not so i'll see about borrowing a timing light.

i can't believe mine would just die like that! doh!

[BeRad]

how many earth straps do you have on the engine going to the chassis? bad earths make stuff go crazy.

[Granto]

just the one.

hasn't been touched.

[BeRad]

For the starter and the earth lead off the battery to be getting hot, the earths off the engine are not working the way they should be, give it a check and check the earth lead off the battery has a good connection to the chassis. maybe add another earth strap somewhere on the block to the chassis, you can never have to many earths . Then again the constant turning of the starter could result in a hot starter and all the power that the starter is drawing could be heating up the earths.

[Granto]

yeah that's what i figured.

i mean, if I'm cranking for 30 seconds - 60 seconds while playing with the dizzy.. it's bound to heat the starter for sure.

argh. i'll have to buy a new battery if i ever get this thing running again.. as .. i'm sure it's no good for the batt.

[BeRad]

no good for the starter either