My 4age not firing up

[Wanabe_Garage]

Ive checked a few things already... looks good

just wondering if vacuume lines have anything to do with my problem? i overlooked the open lines.

[Adash=P]

Fuel might be in the rail but wherever the injectors open to let the fuel is another thing. I've seen this happen on a CA18 that was sitting around for ages got it going after about 20 minutes.

Pour a little bit of fuel into the intake close to the manifold then try to start.

Maybe the fuel lines ar mixed up?

Good luck.

[oldcorollas]

Ive checked a few things already... looks good

just wondering if vacuume lines have anything to do with my problem? i overlooked the open lines.

you have open vac lines?? as in massive air leak into plenum?

one of them wasn't brake booster was it?

small leak might be ok, but big leak = car no go...

see what you can do... do you have vac line running to fuel reg? to MAP (if it has one)
to brake booster? what else....

[fixeruperer]

even tho it has air leaks it should atleast try to fire up, air leaks would just prevent it from running due to not knowing the map, the fuel should still be injected and the spark should still be produced making it start and stall or just pop and rumble.

if you have spark and fuel, when turning it over does it turn turn turn then stop like flat battery then turn again then its to advanced and dizzy needs to be timed.

[Wanabe_Garage]

Thanks everyone

I have double checked the wiring against the ae86 and 20v diagrams and it is good....

...But i noticed i didn't have a O2 sensor........ You dont really need this do you to have it run? I thought it was just for emmissions.

anyway

I found that my circuit open relay was bust so i just jumped the fuel pump on the power wire with a switch for now. I replaced the spark plugs and they were very black. double checked the airbox.... no leak. vacuum lines were they should be.

Ok tried to start.... turn turn turn turnturn.... nothing..... after half an hour of charging the batt and restarting it..... still nothing........till a flat battery
not even a rumble...

I got to thinking... it could be the injectors not delivering petrol.... or maybe the ignitor and coil not working....BTW im using an ignitor/coil for a 16v(i was told it was ok from toyospares) (or just a missing O2 sensor...???)

How can i confirm whether or not these things are working?

I doubt its the timing advance as it turns nicly until im out of battery... but i dont know.

[Wanabe_Garage]

Thanks everyone

I have double checked the wiring against the ae86 and 20v diagrams and it is good....

...But i noticed i didn't have a O2 sensor........ You dont really need this do you to have it run? I thought it was just for emmissions.

anyway

I found that my circuit open relay was bust so i just jumped the fuel pump on the power wire with a switch for now. I replaced the spark plugs and they were very black. double checked the airbox.... no leak. vacuum lines were they should be.

Ok tried to start.... turn turn turn turnturn.... nothing..... after half an hour of charging the batt and restarting it..... still nothing........till a flat battery
not even a rumble...

I got to thinking... it could be the injectors not delivering petrol.... or maybe the ignitor and coil not working....BTW im using an ignitor/coil for a 16v(i was told it was ok from toyospares) (or just a missing O2 sensor...???)

How can i confirm whether or not these things are working?

I doubt its the timing advance as it turns nicly until im out of battery... but i dont know.


BTW.... After trying to start it... i could smell petrol in the engine bay.... i thougt it was a leak but nothing? that could be that the petrol isn't firing?

anyways..

[slide86]

I doubt its the timing advance as it turns nicly until im out of battery... but i dont know.

]

??? i think you are a bit confused. Timing as in IGNITION TIMING. if this is out, it will crank and crank but not fire up. try turning the dizzy/crank angle sensor while someone cranks it. if its starts up or splutters and farts, then you know the timing is up the creek.

Map senor or AFM conneced correctly?

[Hen]

Do the usual checks for spark and fuel. The petrol smell suggests that fuel is being injected, so try spark first.

Pull out a spark plug and press it back into its lead, hold the tip near something earthed and try cranking (careful not to zap yourself, use insulated pliers or something) you should see a spark jumping.

Then check timing by putting a timing light on and cranking.

If you have spark and it is at the right time, then it looks like fuel.

Hen

PS, O2 sensor wont be causing those problems. Can run without it.

[Wanabe_Garage]

??? i think you are a bit confused. Timing as in IGNITION TIMING. if this is out, it will crank and crank but not fire up. try turning the dizzy/crank angle sensor while someone cranks it. if its starts up or splutters and farts, then you know the timing is up the creek.

Map senor or AFM conneced correctly?

i tried it in different positions.... and now it turns differently

..... turn... pause
..... turn... pause

..... turn... pause

..... turn... pause......

still nothing... Ill go back and troubleshoot everything again and test the spark and fuel using your suggections..

[slide86]

ok that means that the timing is WAY out. its getting spark then.

The way its cranking now means that its firing when the piston is on the way up, causing the engine to want to turn the other way (not good)

what you need to do now is get the engine on TDC number 1 cylinder and reset the the timing on the crank sensor (is it dizzy or CAS???).

Once you have the engine at TDC you can put the Dizzy/CAS at 0 degrees. then the engine should fire right up (if its got fuel). Then you can get the car tuned and adjust the timing to the correct advanced position.

[BradW]

Does it do this when you turn the dizzy as far as you can in one dirrection and then crank quickly when you turn it as far as you can in the opposite dirrection?
If so, it sounds like the dizzy is a tooth out.

Edit: beaten to it .

[Moppitt]

It sounds like your not getting any spark. Please check that you have spark as was mentioned above.

Remove HT lead from spark plug,
Stick a screwdriver up the lead,
Place so that there is a small gap to an earth (the rocker cover should be fine for that (anyone confirm that on 20V's),
Get a mate to crank the car while you watch the screwdriver for sparks.

If you have the gap between the screwdriver and the earth around a 1-2mm or so you should see a spark from the screwdriver to the engine.

We cant really go on until you answer that.

Hope that helps and good luck with it

Edit:: Beaten to a better answer Twice

[beeeeee]

Mate,

I had the same problem with my 20v and believe it or not after pretty much tapping everything and checking everything it was the circuit relay that was dodgy. I had to tap it sometimes when the car didnt want to turn over at all to actually start it up.

Replace the relay first and see what happens dude, and also recheck the the wiring to the relay.

Good luck, and tell me how it goes.

[Wanabe_Garage]

no spark

im using a 16v igniter and coil for my 20v is that ok??





I was told to hook it up as follows:
Red- IGT---------- B wire on 20v
White-IGF-------- B-Y wire on 20v
Yellow-Tacho
Brown- IGN+ ---- BO from ignition switch

Can somebody confirm this?

thx

[ozsprintz]

hey mate it sounds like i have the exact same prob as you. this is pretty helpfull thread i am going to check some of these tomorrow.
as for the igniter the igt goes to pink(or red) and igf goes to white
that is what i am told and what i have done but then i still cant start mine.