Hi there, im experiencing very similar problems with a '96 astravan GM diesel, im at exactly the same point by the looks of it, with the 3 wires on the fuel pump! A friend of mine also had the same vehicle and problem, solved by thames vallet electro diesel, for a hefty price! apparently it is a simple wiring modification to bypass the immobiliser, did you manage to find out what to do? or does any1 else out there know?
any help is much appreciated!
Steve
|
Steve
It's not a simple wiring mod. Nobody is naive enough to divulge that sort of information on an open forum.
[And the Mods would instantly take it off even if they did.]
|
Hi guys, I've been trawling through the old posts on this site, looking for answers for the intermittent starting problem ive had on my 1997 Astra DTL. From what ive read on other sites, this problem seems to be quite common on models between 1996-99.
Well i've had my astra for just over a year, and the problem has recently got worse. One thing i've noticed is when the ignition is on, I get no power to the stop-solenoid OR the blue+red wire on my bosch fuel pump.
I'm pretty sure its an immobiliser issue, but i've never had any kind of warning lights flashing on the dashboard to indicate a problem with the immobiliser. Does anyone know if it is possible to change the immobiliser without having to change the fuel pump ECU as well..?
Also does anyone know where the ECU is located on the 1997 model? Aside from the fuel pump ECU, ive heard there is another one on the car, but i've not been able to find it anywhere.
One last thing, could anyone divulge any information or direct me to a link about bypassing the immobiliser?
Please help if you have any ideas!
|
My neighbour's 1996/7 Astra 1.7 TD has a strange problem developing (I think!), related to the fuel cut-off solenoid(s?) on the fuel pump.
He has had difficult cold starting, (turning over for ages, unevenly, then eventually starting with a cloud of smoke and still uneven for a few seconds), so I checked the glow plug feed / timer, and then replaced the glow plugs. I tested the old ones and 3 of them didn't work at all, so I thought 'job done'.
However, I then started the engine to make sure it was ok and it started within a couple of seconds, but it wasn't as instant as you would expect from a diesel (obviously letting the glowplug light go out before turning the key). So I immediately switched it off (so I could try it again) but it carried on running!
If you start the engine and then turn the key off again within a few seconds, it carries on idling. If you then leave it switched off, it will continue idling until about 12-15 seconds after you started it. (So it will run for a total of 12-15 seconds regardless of whether you try to turn it off after 1 second or 11 seconds). It's absolutely fine if you don't switch it off within that time. My neighbour (whose car it is) has never notice the fault, but has probably never tried to stop the engine immediately after starting it!
Anyway, I thought it must be the fuel cut-off / stop solenoid not closing, so I checked the feed to it: there is none (ignition on or off, engine running or not): it is earthed continuously. However, if I disconnect the 3-pin connector in the wiring that goes under the black plastic cover on the back of the pump, (above the cylindrical cut-off solenoid), the engine cuts out immediately (whether within the first 12-15 seconds or after that). One wire to this 3-pin connector has continuous earth, one is earthed with ignition off and live with ignition on, the third wire doesn't give any reading (on a test-lamp screwdriver thingy). I am wondering if the normal looking (as on most diesel cars of this age and older) cylindrical stop-solenoid is permanently stuck open or partially open and whether there is another solenoid (that the 3 wires go to, in the back of the pump), that stays open for at least 12-15 seconds after starting, even if you switch the ignition off again within that time. I can't think why it would need to do this, but presumably it's linked to an ecu or timer or immobiliser or something. When the normal stop-solenoid is working properly (ie closing as soon as the ignition is switched off), having the second solenoid staying open for 12-15 seconds wouldn't make any noticeable difference because the engine would just stop as expected when you switch off the ignition, due to the cylindrical one closing and cutting off the fuel.
So, can anyone throw any light on this strange fault?: Is my diagnosis/theory/guess about a second solenoid correct?
Also, the old type cylindrical stop-solenoid must be open, otherwise it wouldn't get any fuel through and so it wouldn't run. But there is no feed to it, so it must be either stuck open or somebody has removed the plunger, so it needs to be replaced. But then it won't start because the new one will stay shut unless I find out why there is no feed to it. Any suggestions on this?
Thanks.
|
|
|
|
Hi! Had you solved the problem with your Astra? I have a very similar problem with my Astra 1.7TD and would like to get your input on how you solved the problem. My email address is its4me1964@gmail.com Thanks.
|
|
|
|
|
|
Hi! Had you solved the problem with your Astra? I have a very similar problem with my Astra 1.7TD and would like to get your input on how you solved the problem. My email address is its4me1964@gmail.com Thanks.
|
|
|
|
