General: - Spark plug recommendations?

woodman · Jul 11th, 2014, 21:30

Hello,

Please recommend me your favourite plugs!

After fitting a new distributor kindly set up for me by swedishandgerman I had a couple of days of happy motoring and then discovered I was getting an intermittent - but worsening - misfire at idle. I've tracked this down to either a) the brand new distributor cap or b) no 4 spark plug, but I've run out of time today to take the plug out for an inspection. (I know it's not the HT lead because I swapped the 3 and 4 leads over and it's still the same cylinder missing) The inside of the cap looks fine, so I'm fairly sure the plug is the culprit. I also think the plug explains why it's been intermittent and worsening, because it's in the process of breaking down.

Now, this is the first time in 5 years that I'll be running a car with a healthy distributor, so it's only fair that I change the plugs. Which brings me to the question: which plugs would you recommend? I'm not looking for startling power, it's an auto after all, but I need a nice, strong reliable spark at low to medium revs. Oh, and I need them to be quick and easy to buy, too...

Thanks,

Andy.

Derek UK · Jul 11th, 2014, 23:15

NGK BP6HS - Halfords or from Simon on Tuesday.

Put your old cap and rotor back on one at a time as a check as well. Lots of dodgy new rotors about. Wipe cap inside and out with WD40. Idle engine in the pitch dark and look for sparking leads.

woodman · Jul 12th, 2014, 11:39

Quote:

Originally Posted by Derek UK

NGK BP6HS - Halfords or from Simon on Tuesday.

Put your old cap and rotor back on one at a time as a check as well. Lots of dodgy new rotors about. Wipe cap inside and out with WD40. Idle engine in the pitch dark and look for sparking leads.

Thanks Derek. GSF stock the plugs, but in any case I solved the problem this morning - despite only being set up last week the points weren't opening. I can only think the screw wasn't tight enough and after a couple of days use it had slipped. Odd that it was only missing on one cylinder yesterday, but this morning it wouldn't start at all until I reset the points.

About to embark on 1,000 miles or so of summer holiday jaunts, so the old cap and rotor are cleaned and packed, just in case...

Underdrive · Jul 13th, 2014, 10:00

Derek, you suggest cleaning dizzie cap with wd40, I prefer to use carb cleaner or brake cleaner (not sure there is much difference anyway) it removes moisture and grease without leaving a deposit and dries almost instantly.

Derek UK · Jul 13th, 2014, 12:31

In this case it's a new cap so shouldn't need any attention cleaning wise. It was just a suggestion in this instance re misfires as there might have been some dampness/condensation.

Carb cleaner is much stronger than brake cleaner. Not looked at the contents but I think carb cleaner has acetone in it. It does tend to leave a residue whereas brake cleaner doesn't.

jimbo1593 · Jul 20th, 2014, 11:03

Agree with the ngks

Anthony 69 · Jul 20th, 2014, 18:40

Quote:

Originally Posted by jimbo1593

Agree with the ngks

I like NGK s also, in a racing vintage car they last a season where champion need much more frequent attention and replacement according to a friend.

123GT-AMAZON · Jul 20th, 2014, 22:04

hi ya

plus one ( +1 ) for the NGK BP6HS work very well across the board

kind regards
robert

swedishandgerman · Jul 21st, 2014, 12:59

+1 on the NGK's. I've experienced a few bad Bosch spark plugs recently even though I rely on good quality genuine Bosch parts for other ignition components.

I've never experienced this before even though I've used Bosch plugs in VW air-cooled for yonks, I spent a good while trying to sort out why my Beetle was running poorly to find a plug had worked its way loose. Same at the weekend my sister phoned saying her Camper was running poorly; another loose spark plug.

I swapped my Amazon plugs last year as the electrodes had eroded surprisingly quickly. Could be the result of modern fuels, but I don't think the quality's there nowadays.

RSready · Oct 22nd, 2014, 23:55

Has anyone ever used the NGK BPR7HS (aka NGK 6422) plugs before? I can't get the BP6HS plugs anywhere in Canada. All I can get is the equivalent Champion or AC Delco plugs. I don't think I want Champions based on what I've read elsewhere on the forums, but I don't know if I should go with the AC Delco's that are the same as the BP6HS or if I should get the BPR7HS.

Thoughts?

Jul 11th, 2014, 21:30	#1
woodman Master Member Last Online: Mar 10th, 2023 13:03 Join Date: Mar 2010 Location: Sheffield	Spark plug recommendations? Hello, Please recommend me your favourite plugs! After fitting a new distributor kindly set up for me by swedishandgerman I had a couple of days of happy motoring and then discovered I was getting an intermittent - but worsening - misfire at idle. I've tracked this down to either a) the brand new distributor cap or b) no 4 spark plug, but I've run out of time today to take the plug out for an inspection. (I know it's not the HT lead because I swapped the 3 and 4 leads over and it's still the same cylinder missing) The inside of the cap looks fine, so I'm fairly sure the plug is the culprit. I also think the plug explains why it's been intermittent and worsening, because it's in the process of breaking down. Now, this is the first time in 5 years that I'll be running a car with a healthy distributor, so it's only fair that I change the plugs. Which brings me to the question: which plugs would you recommend? I'm not looking for startling power, it's an auto after all, but I need a nice, strong reliable spark at low to medium revs. Oh, and I need them to be quick and easy to buy, too... Thanks, Andy. __________________ 1967 Volvo 121 Auto in everyday use and rolling restoration. 2002 Audi TT quattro. (Sorry!)

Jul 20th, 2014, 22:04	#8
123GT-AMAZON 1800necwinner Last Online: Apr 15th, 2024 22:26 Join Date: Oct 2008 Location: East Anglia ,Suffolk , uk	hi ya plus one ( +1 ) for the NGK BP6HS work very well across the board kind regards robert __________________ I grew up on classic volvos hence my passion for them born and breed into the lifestyle !

Jul 21st, 2014, 12:59	#9
swedishandgerman Premier Member Last Online: Oct 23rd, 2023 21:39 Join Date: Apr 2007 Location: EXETER	+1 on the NGK's. I've experienced a few bad Bosch spark plugs recently even though I rely on good quality genuine Bosch parts for other ignition components. I've never experienced this before even though I've used Bosch plugs in VW air-cooled for yonks, I spent a good while trying to sort out why my Beetle was running poorly to find a plug had worked its way loose. Same at the weekend my sister phoned saying her Camper was running poorly; another loose spark plug. I swapped my Amazon plugs last year as the electrodes had eroded surprisingly quickly. Could be the result of modern fuels, but I don't think the quality's there nowadays. __________________ 2006 XC70 D5 Manual 1968 Amazon Estate, B18A + Overdrive 2019 V60 D3 Momentum Pro Manual 1970 Amazon 2-Door 1970 142DL

Jul 11th, 2014, 23:15	#2
Derek UK VOC Member Last Online: Yesterday 17:06 Join Date: Jul 2006 Location: Chatham	NGK BP6HS - Halfords or from Simon on Tuesday. Put your old cap and rotor back on one at a time as a check as well. Lots of dodgy new rotors about. Wipe cap inside and out with WD40. Idle engine in the pitch dark and look for sparking leads.

Jul 13th, 2014, 10:00	#4
Underdrive Senior Member Last Online: Apr 9th, 2024 10:10 Join Date: Jan 2014 Location: stranraer	Derek, you suggest cleaning dizzie cap with wd40, I prefer to use carb cleaner or brake cleaner (not sure there is much difference anyway) it removes moisture and grease without leaving a deposit and dries almost instantly.

Jul 13th, 2014, 12:31	#5
Derek UK VOC Member Last Online: Yesterday 17:06 Join Date: Jul 2006 Location: Chatham	In this case it's a new cap so shouldn't need any attention cleaning wise. It was just a suggestion in this instance re misfires as there might have been some dampness/condensation. Carb cleaner is much stronger than brake cleaner. Not looked at the contents but I think carb cleaner has acetone in it. It does tend to leave a residue whereas brake cleaner doesn't.

Jul 20th, 2014, 11:03	#6
jimbo1593 Master Member Last Online: Oct 1st, 2023 14:39 Join Date: Dec 2004 Location: leics	Agree with the ngks

Oct 22nd, 2014, 23:55	#10
RSready Junior Member Last Online: Jul 18th, 2016 15:18 Join Date: Jul 2014 Location: Edmonton	Has anyone ever used the NGK BPR7HS (aka NGK 6422) plugs before? I can't get the BP6HS plugs anywhere in Canada. All I can get is the equivalent Champion or AC Delco plugs. I don't think I want Champions based on what I've read elsewhere on the forums, but I don't know if I should go with the AC Delco's that are the same as the BP6HS or if I should get the BPR7HS. Thoughts?

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