ae82 20v Conversion - Problems

[XS1V]

Hey all i just started the 20v in my ae82 fxgt for the first time

Problem is though, it wont keep running it starts then dies, it just wont idle. It will keep running though if you give it continuous bursts of throttle, but not constant throttle or it dies also. The problem im guessing has to be electrical as i havnt touched anything to do with the engine since removing it from my ae101 levin where it was running sweet.

Anyone have any ideas?? Thanks in advance

[EVL20V]

vacuum leak somewhere?

[matt dunn]

lack of fuel pressure.

There was a thread that had this exact problem quite a while ago.

[Mr Revhead]

checked ya AFM plug?

and theres another common thing that escapes me now....

ill be back......

[deaf_rattle]

hey
i would be keen to have a look at your wiring sometime.
would that be sweet?

cheers

[13]

check if ur idle speed control valve has been pluged in power....

[85AW20v]

There's an earth wire on the AFM plug that needs to be connected to....... an earth!! White with a black trace. Had the same problem with the transplant into the AW.

[KinLoud]

Put a jumper wire from the FP to the B+ in the diagnostic plug.
This bypasses the fuel pump relay. If you engine runs normally then you will have to sort out a wire from the AFM switch to the fuel pump relay.

In MAP sensored motors the computer controls the fuel pump relay after you let go of the starter key. In 20v silvertops the pumps is controlled by a switch in the AFM which closes when you have air flowing through it keeping the flap open. In both cases MAP and AFM the fuel pump will stop when the engine stops so there will be less fuel spraying around if you have an accident.

Ken
Ham
021 408 863

[sergei]

as pple said, fuel pump relay not connected thru AFM, had to sort it out when I did wiring for a 20v conversion on a 4AFE...

[XS1V]

vacuum leak somewhere?

All lines havnt been touched but have rechecked and all looks good

lack of fuel pressure.

Fuel pressure seems to be fine, has the 20v pump running and yea

checked ya AFM plug?
and theres another common thing that escapes me now....
ill be back.......

Will do that, its all plugged in, maybe some wires need to be connected somewhere.... Hope your back soon

i would be keen to have a look at your wiring sometime.
would that be sweet?

Yea that would be awesome, im home again on sunday avo, stupid broken ankle makes getting around tough

check if ur idle speed control valve has been pluged in power....

where is that??

There's an earth wire on the AFM plug that needs to be connected to....... an earth!! White with a black trace. Had the same problem with the transplant into the AW.

where through the 20v loom does it run?

Put a jumper wire from the FP to the B+ in the diagnostic plug.
This bypasses the fuel pump relay. If you engine runs normally then you will have to sort out a wire from the AFM switch to the fuel pump relay.

Ok have done that just now and didnt make a diff

as pple said, fuel pump relay not connected thru AFM, had to sort it out when I did wiring for a 20v conversion on a 4AFE....

Yea dont think its that after testing it

[MetalupYoAss]

try idle bypass valve, when i did my conversion, i had similar problems, you need to find the tube coming off the idle bypass valve (perhaps some nice toyspeeder can show one on a silvertop photo) and plug the pipe up, see if this helps.

[85AW20v]

Sorry - can't remember where the wire pops out - could be on a grey plug somewhere near the diagnostic plug area as thats where I've connected mine. Use a meter to trace it. I've pulled out all the stuff I don't need out of my loom so don't have the extra plugs etc.

To test if its the AFM earth, turn the key on then hold open the AFM flap. The fuel pump should run all the time until you close the flap. To see if it only runs while cranking, pull the solenoid wire off the started motor and then turn the key to the start position - just so you can hear whats happening with the fuel pump. Again the fuel pump should run until you let the key go. Normally, the AFM side of things takes over once the flap is open from air flow into the motor.

Hope this helps.

[XS1V]

Ok so ive traced it pretty much top the AFM i think.... it will run if you hold the flap open a little with your hand, so what could that be?

All three earths are definately going to appropriate earthing points. The three yellow wires to ecu give both 12v and ground on the multimeter though, dont know if they are supposed to do that or not

Any more ideas?? Everyones help is appreciated

[matt dunn]

Ok so ive traced it pretty much top the AFM i think.... it will run if you hold the flap open a little with your hand, so what could that be?

When the engine is running the airflow should hold the flap open.
If it does not then the must be an airleak between the AFM and the throttlebody?

BOV possibly?

[sergei]

defently a leak somewhere.

[XS1V]

Well i have sorted that problem I had changed my airbox cover because my old one was dented but the new one hadnt been sealing so ive swapped them back and yea

Just got to work out getting the back up light switch going and the front park lights

[deaf_rattle]

hey

You going to be home this weekend?
if so would it be sweet to pop round?

[XS1V]

hey

You going to be home this weekend?
if so would it be sweet to pop round?

Yea i will be home sunday afternoon, flick me a text on 0276642757 when you want to come round

[XS1V]

Well just wired up the reverse lights so thats all sweet and also got the park lights all done as well