PDA

View Full Version : bigport 4age problem


superbmobile
26th March 2009, 03:55 PM
so basically the motor will run for around two to three seconds at high idle and then stall, ive check various plugs and relays etc and it is getting fuel and spark. any help would be appreciated cheers.
Hen may possibly be a nut
26th March 2009, 07:21 PM
Check if your fuel pump is staying on. Maybe it's running only while the key is in the start position, then cuts out once you let go, giving you only a few seconds of pressure.

Hen
Clinton
26th March 2009, 07:27 PM
if you open the throttle up will it stall straight away?
Sprinter86
26th March 2009, 07:38 PM
as hen has said, it sounds like the circuit opening relay may not be switching power to the fuel pump once you stop cranking.

ive seen a few ecu's fail to output the 'FC' earth to keep the relay switched and fuel pump running before, might be this, or has been wired wrong.

my 2c.
Oversized 86
26th March 2009, 10:46 PM
the car is running the infamous "raging inferno" fuel setup...
no COR..
superbmobile
27th March 2009, 12:08 AM
if you open the throttle up will it stall straight away?

yeah as soon as the throttle is touched it will stall.
KE70
27th March 2009, 01:02 PM
yeah as soon as the throttle is touched it will stall.
This is happening with my car, but mine stays on for a while. i.e. it idles but only just. Im hoping the new MAP sensor I got for it will fix it as the old one seemed to be stuffed.
superbmobile
27th March 2009, 01:59 PM
yeah the map sensor is still in working order ive tried it on another motor so it rules that out.
Matt-AE86
27th March 2009, 03:05 PM
Have you just installed this into your car ? Have you had a 4AGE before ? Has this been running in this car fine before with no problems and this has just come around ?

Let us know and we might be able to give you a more direct answer.

In the mean time go to your ECU. Check that the BF pinout on the 10pin plug to the LEFT.

Check that this has 12v when the key is turned to ON (Ign ON). If it doesn't, temporarly add a wire from BF to B+. Try to start the car again and see what happens.

Ecu pinouts below.
http://club4ag.com/faq_and_tech_pages/Tech%20Photos/Techno%20Pro/ECU_Japan_AE86_1984-85.jpg
superbmobile
27th March 2009, 05:28 PM
yeah the 4age was just installed came out of a previous running car. Yeah mate looks like it never had 12v i tried the wire and it worked cheers.
Matt-AE86
27th March 2009, 05:43 PM
Happy I could help :)

Now either setup a relay as intended by factory or cross over the orange/black coil wire to the BF wire (this is how ae82 4age works)

What loom do you have, FWD AE82 modified or JDM AE86 ?
Golberg
27th March 2009, 08:20 PM
Sounds like you have a serious vacuum leak.

Did you take the manifold off the motor during the swap process?
If you did, what gaskets did you use when you put it back together?
superbmobile
28th March 2009, 03:04 AM
Happy I could help :)

Now either setup a relay as intended by factory or cross over the orange/black coil wire to the BF wire (this is how ae82 4age works)

What loom do you have, FWD AE82 modified or JDM AE86 ?

yeah cheers again. yeah im running a jdm 86 loom.
Oversized 86
28th March 2009, 04:34 PM
no your not...

its a modified ae82 loom...
Matt-AE86
28th March 2009, 08:00 PM
no your not...

its a modified ae82 loom...

If that's the case, something has been modified in the loom, or the fuse is blown on the loom for the EFI. One of those little dangler things hanging of the loom over the firewall. the biggest one should have a fuse.

That's if someone didn't cut it off.