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It wont start, and wont give codes (It runs, YAY)
Posted 09 April 2006 - 12:20 AM
Fuel pump cycles on and off.
There is 12v to earth on both pins of the injector. Is this right?
Only code that flashes is 7 (australia non turbo) (im using the mpfi ecu for now)
o2 sensor is not connected,.. no code
When i unplug the injector ,,, no code
im yet to see if i can get a code, even though i have unplugged the maf, injector and purge soleniod, but still no codes???
only previous code was coolant temp, but i fixed it.
This was with no test connectors connected.
Is there anything im not doing?
Could my ecu be toast?
Posted 09 April 2006 - 12:23 AM
Posted 09 April 2006 - 02:58 AM
Check the connections, clean 'em up, if all else fails, replace... That's what I did.
Posted 09 April 2006 - 03:57 AM
So i will order new leads and a new disty cap as well, the points in it are pretty worn.
But that still doesnt explain why if i unplug the maf, the injectors, the ficd solenoid or the purge soleniod, it doesnt give codes
Beats me :-\
The car has sat in a paddock for almost 2 years (i have had it running, about 6 months ago, before i started the conversion) so I drained the fuel at the outlet just before the pump, and put more in, but should i drain the whole tank, how is this done
Posted 09 April 2006 - 11:50 AM
Easiest way I've found to drain the gas tank.... Unhook a fuel line under the hood before/after the fuel filter. Get extra length of fuel line and route into container. Turn key to 'on' and let the fuel pump pulse and pump out the gas. Takes a while, but you don't have to rig up any power connections directly to the pump. For the couple I've drained this way, I just got a majority of the old gas out, then replaced it with much more good gas + seafoam.
Posted 09 April 2006 - 09:29 PM
You could try spraying some starter fluid into the intake to see if that will make the engine fire.
Posted 10 April 2006 - 03:41 AM
So ignition seems good.
Fuel is the problem.
I have 12 volts on both sides of the injector, then when i start it, the voltage fluctuates (kinda hard to tell with a digital meter)
Sooooo,..... Its either bad fuel, or the injectors are blocked :-\
Im gonna try to make up a temporary tank and fill it with fresh fuel and see if that works.
Hooziewhatsit... When i turn the ignition to on (not start) the fuel pump comes on only once, I didnt have the green plugs connected, but if i do, the fuel pump cycles on and off.
Posted 10 April 2006 - 05:19 AM
Disconnected the fuel line from the back of the fuel filter, led the hose to a jug, plugged in the greens, put the key in the ON position.
Once no more gas came out, I immediately turned the key to OFF, replaced and reconnected the fuel filter, put in a few gallons of fresh fuel, added half a bottle of injector cleaner, and it started up.
Again, like I said, I dont know if it's bad for the car, I'm just telling ya what I did.
Posted 10 April 2006 - 06:08 AM
once the connectors are verified - are you sure the fuel pump is sending fuel to the engine? have you pulled a hose and verified that when you turn the key on the fuel pump cycles and gas comes out at the engine?
might be hard for a mutimeter to read real time fluctuations at the fuel injectors like you said.
fuel injectors have a common ground under the intake (close to the thermostat housing, behind it and the power steering pump). and there are also the dropping resistors by the front strut tower that are for the injectors.
this could get really confusing so i'll try to keep it short but what year motor and engine exactly did you use? i just looked through the wiring diagrams this weekend for my issues (in the States, don't know if yours is different) and the 1987 and 1988 model year wiring harnesses are quite different. and on another note the waste gate solenoid (for the turbo) is tied into a number of different things, it branches off to the fuel pump relay for sure and some other things. not sure if this could be your issues but sounds suspicious. if you're not getting fuel at the motor when you turn it on or try to start then i'd suspect it is related to this and i can go into more detail later.
Posted 10 April 2006 - 06:27 AM
Ive checked out the wiring for the wgds,.. one pin goes to the ecu (the ecu grounds this when activated) the other wire is connected to the 12+ on with ignition that the fuel pump and other solenoids are connected to.
I think bad fuel is the problem, cos it gave a couple of coughs before i started adding fuel to the intake.
I will try with new fuel and see how it goes.
Posted 10 April 2006 - 06:51 AM
Posted 10 April 2006 - 07:33 AM
Posted 10 April 2006 - 11:39 AM
Just another look at it I guess...
Posted 11 April 2006 - 04:03 AM
Im gonna take them off and put some others on.
I will take another look at the earthing (this is the one on the thermostat housing right?) but im pretty sure it is ok.
It ran a little better today, for nearly 8 seconds, and that cos i adjusted the timing, i think i had it at 0deg tdc. But i still needed to add fuel to the intake to get it to run.
Keep those suggestions coming
Posted 11 April 2006 - 05:08 AM
Posted 11 April 2006 - 05:15 AM
the line off the filter will connect to the iddle and highest line on the intake, the return line is the other, and the skinny is the vapor breather.
the fuel coes into the rails BEFORE the INJECTOR side, and the return line is AFTER the fuel pressure REGULATOR
Posted 11 April 2006 - 10:12 AM
As I stated before, someone here had this same problem and found that the ECU internal ground had a bad connection and simply repaired it to get things going again. The problem with your car may be the same thing.
Posted 14 April 2006 - 04:17 AM
started it, nothing....
Poured fuel down the throat, it ran,..... stumbled,.. so i hit the accelerator pedal and it died.
Repeated it and VROOOOOM
So i thought it must have been a bad maf so i plugged it back in.
It ran:slobber: ... so i unlpugged the air intake, it died:confused:
So maf is good and the car now runs
The only problem is that there is smoke rings coming out of the radiator pipe (no radiator at the moment) so must be a headgasket
And there is oil in the turbo,... prolly not a good sign
But it runs,.... YAY FOR GANNON
Thanks guys for your input:headbang:
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