Ok, so I am new to the forum. I have searched and read pretty much every thread on V6 stalling issues, but none of them come close to explaining this one.
Now let me begin.
A few weeks ago I purchased an Omega 2.5 V6. Drove the vehicle back from Kirkby where I purchased it, back to Leicestershire (120 miles). In the few places the wheels touched the ground on the journey (boy these things are fast), the car was fantastic. Stopped half way along the journey, checked the oil, water, blah blah - all fine.
5 days later, driving locally to the nearest vauxhall dealer to purchase a new cover for the towing eye, the car stalled. Engine wasn't that warm, but it just stalled. After a few minutes, it restarted and was just fine.
6 days later while taking my son and the other half swimming, the car did exactly the same again. This time, it took 30 mins before the car would restart. Again, this was a short journey (2 miles) and the engine wasn't that hot.
Since then the vehicle has done this to me 4 other times. The local Vauxhall dealer want to charge me £62 per hour to diagnose the fault.
When I called the RAC out the second time the car stalled, the RAC man checked just about everything. I bribed him with a few 's and he spent just over an hour checking the ECU, fuel pump, fuel pump relays, ICV, Airflow meter, but the all checked out ok? He suggested it was the lambda sensor or a water temp sensor?
Does anybody have a clue or am I destined to a receive a serious butt f@%$ing from the vauxhall dealer in the shape of a couple of hundred pound bill .
Since mr RAC seemed to have covered most things, take the practical approach.
1. clean all breather pipes cos mine had a habit of stalling and failing to restart due to clogged pipes and a buildup of crankcase pressure.
2. Does the ECU light flash on and off as mine had a habit of this cos the immobiliser pickup was iffy and had trouble registering the chip inside the key therefore switching itself off.
Lambda sensor wouldnt cause any majorly big problems besides under or overfuelling, therefore unrelated to your stalling problems. Just pop out the plugs and investigate their colour - black sooty deposits indicate overfuelling, whereas shiney white appearance means running lean.
Water temp sensor - hmmm, sorta like an autochoke but electronic, cant see this causing the stalling problem.
I know the V6 beast gets damn hot under the bonnet, so just wondering what condition the leads and the coil pack are in?
Check all earth straps and earthing points are in good condition as well as this can have adverse effects on engine performance.
Hope this helps at all, no doubt someone on here can come up with more help than this as there are many v6 experts on here!
Keep us posted on your investigations and anything else strange that happens.
That sounds like your fuel pump relay or maybe one of the feeds to it. Can cause havock.
Should be in the drivers side foot well. Take off cover on the right and it's probably situated somewhere around the ECU. Start car up and wiggle the feeds that go to the relay. If they are fine, then replace the relay. I've had fuel pump relays go on ALL my injection Vauxhalls. Symptoms are as you have described.
JJ - ECU light stays off all the time. The RAC man tested the coil pack via the ECU diags, all was OK. Also, cheers for the welcome.
SimonP - the old boy suggested it was the fuel pump relays as well, maybe he is not so daft after all. I will give it a go later and let you all now. Also, thats a quality transplant you have done on that astra - top notch.
The problem also manifested itself in a different way to me this morning. I was changing down to overtake a doddering old git this morning, and the engine revs dropped for a split second to zero, the car shuddered and then the engine picked up and pulled as normal.
Nope, ECU light doesn't come on at all. (Apart from the obvious when you first put the key in).
(Sorry to go on about him but), the RAC man only found one error on the ECU - Error 19, something todo with the rev monitoring, but he did say that every vauxhall that he went to always had this error....