 Spark Plugs, Bad from factory? |
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| edmitch |
 Apr 25 2024, 01:41 PM
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#1
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Newbie  Group: Members Posts: 2 Joined: 19-March 24 From: South Carolina Member No.: 28,007 Region Association: South East States  |
Any experience out there with receiving NIB "bad" plug? I just changed plugs on my 914-4 2.0 and its running rough. Pulled the plug wire on #2 and no change - pulled the plug and it is fouled - after maybe 5 miles and apparently has no spark. Regrettably, not anticipating this, I tossed the old ones. Guess I'll be at the parts shop on the morning. Anyone run into this lately?
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| StarBear |
Apr 25 2024, 01:48 PM
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#2
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Senior Member Group: Members Posts: 1,860 Joined: 2-September 09 From: NJ Member No.: 10,753 Region Association: North East States 
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Nope. (IMG:style_emoticons/default/smile.gif) I Use NGK.
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| technicalninja |
Apr 25 2024, 01:54 PM
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#3
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Senior Member Group: Members Posts: 1,191 Joined: 31-January 23 From: Granbury Texas Member No.: 27,135 Region Association: Southwest Region
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(IMG:style_emoticons/default/agree.gif) (IMG:style_emoticons/default/agree.gif) (IMG:style_emoticons/default/agree.gif)
I run NGK in EVERYTHING if I can. In 40 years I've had 1 NGK plug that was bad from the git go... It's uncommon even for Bosch but possible on eveything. It's also extremely easy to buy counterfeit plugs and not realize it. Especially the expensive Iridium type... Now, if two plugs foul out in the same cylinder, I would look at other things. First thing I'd do is to use a stethoscope on the injector. Make sure it's "clicking". If it's stuck open (and quiet) it could cause what you are experiencing. Bad plug wire might do it too. |
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| Jack Standz |
Apr 25 2024, 02:46 PM
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#4
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Member Group: Members Posts: 272 Joined: 15-November 19 From: Happy Place (& surrounding area) Member No.: 23,644 Region Association: None |
Never had a spark plug fail right out of the box. Never.
But, it could be a fake part. Stories about fake parts seem to be a thing now. Did you check to see if it's getting a spark at that plug? Swap that one with one from a cylinder that is firing and see if you're getting a spark. "apparently has no spark " Yeah, it's either getting a spark in that cylinder or it isn't. We just have to know (IMG:style_emoticons/default/smile.gif) |
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| Geezer914 |
Apr 25 2024, 04:02 PM
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#5
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Geezer914 Group: Members Posts: 1,393 Joined: 18-March 09 From: Salem, NJ Member No.: 10,179 Region Association: North East States
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NGK also!
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| JamesM |
Apr 26 2024, 10:36 PM
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#6
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Senior Member Group: Members Posts: 1,895 Joined: 6-April 06 From: Kearns, UT Member No.: 5,834 Region Association: Intermountain Region |
What type of plugs did you put in? You want to be sure you run just the basic copper plugs. All the fancy exotic metal plated electrode plugs tend to foul out very easy due to the tiny electrodes.
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| mlindner |
Apr 27 2024, 07:23 AM
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#7
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Senior Member Group: Members Posts: 1,518 Joined: 11-November 11 From: Merrimac, WI Member No.: 13,770 Region Association: Upper MidWest
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Yup NGKs, I run a little hotter #6. PMO a little ruch. Mark
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| stownsen914 |
Apr 28 2024, 06:38 AM
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#8
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Senior Member Group: Members Posts: 913 Joined: 3-October 06 From: Ossining, NY Member No.: 6,985 Region Association: None |
These days anything could be poor quality or counterfeit. Any car parts I care about, I make sure to buy from a reputable supplier (I.e. not Amazon). If you trust supplier, buy another plug and see how it goes. If you have any question, but another set from a good supplier. I’m a recent convert to NGK after many years of using Bosch.
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| Mikey914 |
Apr 28 2024, 04:18 PM
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#9
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The rubber man Group: Members Posts: 12,657 Joined: 27-December 04 From: Hillsboro, OR Member No.: 3,348 Region Association: None
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Counterfit is a HUGE problem with NGK.
Saw a set next to real. What was most interesting was the on the fakes the printing on the box looked better than the real ones. |
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| FlacaProductions |
Apr 28 2024, 08:10 PM
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#10
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Senior Member Group: Members Posts: 1,570 Joined: 24-November 17 From: LA Member No.: 21,628 Region Association: Southern California
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Thought this was interesting - my latest box of NGK's.
According to that site, they check out.  |
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| edmitch |
Apr 29 2024, 05:46 AM
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#11
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Newbie Group: Members Posts: 2 Joined: 19-March 24 From: South Carolina Member No.: 28,007 Region Association: South East States |
Thanks to all for responses - especially about fake parts - never thought about that. Turns out it wasn't the plug, it was a fouled injector. I just needed a second set of eyes to watch the ignition sequence. Pretty sure I got the plugs from Rockauto - and I've never had bad parts from them. My bad.
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| nivekdodge |
Apr 29 2024, 06:26 AM
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#12
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Member Group: Members Posts: 250 Joined: 28-August 21 From: Pittsburgh Pa Member No.: 25,860 Region Association: MidAtlantic Region
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Bought a set from advance.NGK. One was bad. You can check them easily with a timing light.
Kevin |
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