Ae92 89 Model Sprinter gt apex 16v 4age wont start

[ToyotaTodd]

Hi Everyone.
I was wondering if anybody could give me some insight on why i cant get my project car to start.
Currently she will turn over it just sounds like its not getting fuel.
So far i have, checked all four leads and plugs for spark . all good.
injectors appear to be functioning (checked by ear haha)
Loosened the bolt on the main fuel line which leads to the manifold, fuel wont come out while i
crank the engine but when i bridge the terminals B+ and Fp on the diagnostic port than turn the ignition on the pump buzzes and fuel sprays out
how i imagine it would under enough pressure.
Fuel open circuit relay clicks upon cranking the car this also turns on the speedo cluster backlight?
i took the relay to have it tested by a mechanic that works next door to our factory ohms seemed within range
to what specs i have uncovered from google-ing.Set the distributor after multiple attempts which i think is all ok.
The only time shes breathes some life is when i spray aerostart into the intake manifold then it starts effortlessly
and runs for a few seconds until obviously the aerostart gets burned up and she conks.
Normal cel code
The dizzy cap seems worn Would this prevent some kind of signal being sent to open the fuel system?
If the dizzy timing was out it wouldnt run even with the aerostart am i correct?

Its all been good and fun narrowing down problems and its been a good learning curve but i really just want it to
run so i can paint her up and put it back together. Any help would be greatly appreciated Cheers

[BLSTIC]

The fact that the car runs on aerostart means that a lot of things are working correctly. The distributor is correctly wired, the timing is near enough, the ECU knows what is going on and is attempting to run the engine. The injectors clicking mean that it's at least getting enough information to run in a limp mode so the problem is not your ecu.

Have you tried bridging those terminals while cranking the car?

But there are two different ways of triggering the fuel pump, depending on whether your car came with an airflow meter or a MAP sensor.

If it came with an airflow meter (like the early ae92 GT-Z with the supercharged motor) the fuel pump won't operate without the airflow meter giving a signal (it's actually controlled by an output on the airflow meter). If you move the flap by hand it might trigger the fuel pump.

Map sensor equipped cars run off the ecu. Upon turning the key to ON will prime for a second or three then stop until the ecu receives a signal from the distributor (when the engine is rotating), then start again.

Then there is the possibility of having made a dumb mistake with the fuel lines. The correct way is tank-pump-fuel rail-regulator-return. Disconnect your fuel return line and see if there is fuel being returned to the tank.

[ToyotaTodd]

thanks for reply.
I have tried bridging the terminals while cranking the car same result still sounds like its not getting fuel, i haven't tried playing with the air flow meter yet this could very well be the culprit.
Cheers for covering up the aerostart facts that helps the process of elimination a lot. The fuel line mix up id say is out of the question as the car was apparently running before the guy i got it off stripped it all down for painting.
It doesn't look like anything in that area has been changed from factory.
I'll have a look at the afm flap, if i can find it thanks

[ToyotaTodd]

Just had a quick look and google to confirm its MAP not AFM. Red top with Tvis

[dnegative]

Pull the plugs after cranking and check those?

Check the MAP hose, check the sensor, check the TPS

[ToyotaTodd]

hey dnegative thanks for your input,
i will check the map hose and sensor tomorrow, by tps do u mean the throttle position sensor?
When i was playing with the diagnostic codes i manages to confirm the tps to be ok by pressing the accelerator to the floor to get 11 blinks
from the cel which referring back to a pdf 4age manual says to be all good.
Which plugs do i pull after cranking and what am i checking for? could you please specify? I don't have a voltmeter but i think i'm gonna need one to get
to the cause of my problems...

[ToyotaTodd]

ok after resurrecting the car after being flooded im back to square one except now the car will fire if i run the fuel pump manually from the battery, fires and runs no worries.
The problem now lies in the fuel pump circuit, has to be.Turns out i had a freyed injector wire
Pump wont prime on key turn nor does it buzz while im cranking the car the open circuit relay is clicking on and off, this tells me the problem lies somewhere from the foc to the ecu.
Any insight before i try and chase up a new ecu for it?
All help so far has been appreciated cheers toyheads..

[BLSTIC]

If the fuel pump relay is clicking (and you hear it operate when the fuel pump is supposed to be switched (i.e. On key on and a second or three later) the ecu is not at fault. Check the relay terminals with a multimeter. One will always have 12v, one will always earth through the fuel pump (i.e less than 20 ohm to ground). With the other two, you will have EITHER power triggered (one always direct to ground, the other either open circuit or 12v depending on if the ecu ids trying to run the pump) OR earth triggered (another constant power, with the other terminal earthed while the pump is supposed to be on, open when off).

If the the above is not true you at least have a direction to start looking in the look for faults. If it is, swap the relay and try again

[ToyotaTodd]

after the flood the original foc relay was shot, didn't even click anymore, so i replaced it with one from a ae92 from the wreckers, would this be affecting it in anyway? basically what im getting at is are all the foc relays from the a series motor the same?
I did test the original one before the car went under, it seemed to be all in working order comparing to the stats i found here Injectronics Automotive Electronics Parts Melbourne Australia - 14) Circuit Opening Relay.
So the working relay didn't trigger the fuel pump before she got flooded either...unless the freyed injector wire had something to do with it?

[ivandude]

Just to confirm because everything else sounds good, you are sure the engine turns over & cranks? I read in the original post you mention it does over but just seeing how sure you are that it is def cranking. Did you purchase the car not running or had you just put everything back together after doing some work on the engine (or something similiar) ?

Cheers & good luck.

[ToyotaTodd]

The guy i bought the car off said it was running before it was stripped down and prepared for paint. nothing has been rebuilt or disassembled mechanically. its only got 110000 original kms.
Running the fuel pump from the battery with two jumper wires and turning the car over it starts and runs no worries. In the first couple of posts i couldnt get the car to fire nor pump fuel unless the b+ and fp terminals where bridged,now it wont even do that.
Fixing the freyed injector wire has fixed the no start or run condition i had in earlier posts.
Only way to get the pump to run is with the 12v jump mentioned above