Engine 850: B5234T/2.3/20v/T5: - Missing after new plugs & leads ??

AUS T5 · Feb 14th, 2008, 05:30

I have just replaced my spark plugs and leads on my 94 850 T5 @ 220,000 K's since the last time I changed the leads was 100,000 K's ago so thought they should be renewed (the plugs had done 30,000 K's ) since I am off on a 3,000 K trip next week. The car was running perfectly, no probs, but now it's a different story! I fitted Bosch super 4 plugs (recommended by a local Volvo specialist) and the new leads were by Bougicord, again recommended by the Volvo specialist. Alas, poor girl is not the same, she starts OK, and runs fine under light driving around town, but when I flaw it on the freeway, she just miss fires and loses power and shudders!?
Is it the plugs, I was on genuine Volvo R6's before, or the leads? As I said before, she was running perfectly before on the old leads and plugs!!??
Thanks guys

Alec Dawe · Feb 14th, 2008, 07:05

Did you keep the old leads and/or plugs (I always do until I'm sure everything is OK.
if you did, you could try swapping back, and see if that makes any difference.
I think the general opinion on the forum is that Volvo plugs are best.

AUS T5 · Feb 14th, 2008, 07:12

Thanks Alec,
I did keep the bits and yes, I have just swapped the old plugs back, and she's much happier, no breakdown at all under the hardest of acceleration, so a good lesson learned, I will use genuine Volvo plugs in the future. I was wondering if the problem might have been exaggerated because I have the Rica 310 re map?
Cheers.

Mehboob · Feb 14th, 2008, 09:53

Bosch super 4 is for the NA cars, not T5. T5 uses single electrode spark plugs.

Feb 14th, 2008, 05:30	#1
AUS T5 Senior Member Last Online: Dec 18th, 2023 19:57 Join Date: Dec 2004 Location: Brisbane	Missing after new plugs & leads ?? I have just replaced my spark plugs and leads on my 94 850 T5 @ 220,000 K's since the last time I changed the leads was 100,000 K's ago so thought they should be renewed (the plugs had done 30,000 K's ) since I am off on a 3,000 K trip next week. The car was running perfectly, no probs, but now it's a different story! I fitted Bosch super 4 plugs (recommended by a local Volvo specialist) and the new leads were by Bougicord, again recommended by the Volvo specialist. Alas, poor girl is not the same, she starts OK, and runs fine under light driving around town, but when I flaw it on the freeway, she just miss fires and loses power and shudders!? Is it the plugs, I was on genuine Volvo R6's before, or the leads? As I said before, she was running perfectly before on the old leads and plugs!!?? Thanks guys __________________ 2009 XC 90 V8 2000 V70 T5 5spd GEARTRONIC WAGON (sold) DEC. 94 850 T5 WAGON

Feb 14th, 2008, 07:05	#2
Alec Dawe Former Support Team Last Online: Jan 26th, 2024 11:26 Join Date: Jan 2006 Location: Nr Norwich	Did you keep the old leads and/or plugs (I always do until I'm sure everything is OK. if you did, you could try swapping back, and see if that makes any difference. I think the general opinion on the forum is that Volvo plugs are best. __________________ Alec. (My other car is a WD 2-10-0)

Feb 14th, 2008, 07:12	#3
AUS T5 Senior Member Last Online: Dec 18th, 2023 19:57 Join Date: Dec 2004 Location: Brisbane	Thanks Alec, I did keep the bits and yes, I have just swapped the old plugs back, and she's much happier, no breakdown at all under the hardest of acceleration, so a good lesson learned, I will use genuine Volvo plugs in the future. I was wondering if the problem might have been exaggerated because I have the Rica 310 re map? Cheers. __________________ 2009 XC 90 V8 2000 V70 T5 5spd GEARTRONIC WAGON (sold) DEC. 94 850 T5 WAGON

Feb 14th, 2008, 09:53	#4
Mehboob Junior Member Last Online: Dec 21st, 2011 11:06 Join Date: Apr 2006 Location: Cape Town View Photos By: Mehboob	Bosch super 4 is for the NA cars, not T5. T5 uses single electrode spark plugs.

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