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1978 · Dec 23rd, 2020, 00:06

I have good news, the Volvo runs now........What was wrong, well..............Many years ago, well 26 years to be exact I had a Peugeot 604 fitted with the same 2.7litre V6 I also had some running issues, turned out that the fuel I was using wasn't of a high enough octane and it suffered from lack of power, all the unburnt fuel started flooding the exhaust system until the muffler exploded and the car just died. I tried to get the car started without any joy, I removed the spark plugs to find them wet. I contacted the original owner who purchased the car new as he was a Peugeot Specialist to talk to him about the way the car was running and that I had only just bought the car less than a month ago from a different owner. The first thing he said to me, 'What fuel are you using'? 92 Octane I said, to which he replied, don't use that fuel, you have to use a minimum 96 Octane! He said that the lower quality fuel doesn't burn effectively and you end up with poor running and excess unburn fuel collecting in the exhaust pipes. He said change the spark plugs and use higher quality fuel, after that I never had any further problems. My mate borrowed the car for a weekend and put low octane fuel in the car, after he returned the car it wasn't running well at all and finally broken down, though it was trying to start it just wouldn't run. Eventually I asked my mate what fuel he had put in it. Low quality cheap octane!! Great

I fitted new spark plugs and had better quality fuel before it would start again.
A bit long winded my story here but the gist of the matter was that I put new spark plugs into the Volvo and the engine started, revved up, idled, no fuel leaks from any of the outer lines or Fuel distributor. I just recalled all the starting problems I had with the other V6 and remembered what I had done to sort it.

Thanks again guys for your help on this.

Dec 23rd, 2020, 00:06	#19
1978 Junior Member Last Online: Apr 3rd, 2024 12:52 Join Date: Dec 2020 Location: WISBECH	I have good news, the Volvo runs now........What was wrong, well..............Many years ago, well 26 years to be exact I had a Peugeot 604 fitted with the same 2.7litre V6 I also had some running issues, turned out that the fuel I was using wasn't of a high enough octane and it suffered from lack of power, all the unburnt fuel started flooding the exhaust system until the muffler exploded and the car just died. I tried to get the car started without any joy, I removed the spark plugs to find them wet. I contacted the original owner who purchased the car new as he was a Peugeot Specialist to talk to him about the way the car was running and that I had only just bought the car less than a month ago from a different owner. The first thing he said to me, 'What fuel are you using'? 92 Octane I said, to which he replied, don't use that fuel, you have to use a minimum 96 Octane! He said that the lower quality fuel doesn't burn effectively and you end up with poor running and excess unburn fuel collecting in the exhaust pipes. He said change the spark plugs and use higher quality fuel, after that I never had any further problems. My mate borrowed the car for a weekend and put low octane fuel in the car, after he returned the car it wasn't running well at all and finally broken down, though it was trying to start it just wouldn't run. Eventually I asked my mate what fuel he had put in it. Low quality cheap octane!! Great I fitted new spark plugs and had better quality fuel before it would start again. A bit long winded my story here but the gist of the matter was that I put new spark plugs into the Volvo and the engine started, revved up, idled, no fuel leaks from any of the outer lines or Fuel distributor. I just recalled all the starting problems I had with the other V6 and remembered what I had done to sort it. Thanks again guys for your help on this.