Engine spark plugs are responsible for igniting an engine's air-fuel mixture, a process that creates engine power. 2013-01-08 11:30:17. Re: ac delco spark plugs. 350 vortec engines use a 41-993 ac-delco plug pre-gapped at 0.060. Spark Plugs and Wires. Brand New. ACDelco GM Original Equipment Double Platinum Spark Plugs are designed, engineered, and tested to rigorous standards, and are backed by General Motors. Platinum pugs peaked at just under 185 hp with an optimum 066 gap. Incorrectly gapped spark plugs can negatively impact engine performance. In most cases, that gap is indicated on the package. within the General Help forums, part of the LSx Technical Help Section category; O.K. Unless you are modding the ignition. With three specialty plugs, hp dropped 1.5-2hp. Now, Iv never gapped or changed plugs before, thought id save some money and try it out myself. Welcome to CF !!! Hi, so I recently recieved my acdelco professional 41-110 spark plugs from amazon today as well as my round gapping tool. Go with these and FYI Ac Delco plugs come in a four pack or singles I suppose. Pre-Gapped Laser Welded Ground Electrode 5 Yr. Linda. Unfollow ac delco 41-985 spark plugs to … If the gap is adjustable and different from the gap specified by the engine manufacturer, it needs to be adjusted. ... New Listing 6 pc Champion Iridium Spark Plugs for 2011 Saab 9-4X - Pre Gapped Ignition dp. Gap new as well as old spark plugs, even if the package says that the new plugs are “pre-gapped.” To avoid problems, work … Report abuse. Are Ac Delco Spark Plugs pre gaped? That figures,now I am going to have to change them.I have noticed that it hesitates a bit.I didn't think it was the plugs (Bosch platium +4s)though,they are brand new. With same stock plugs, same 045 gap, hp increased to 180.5. This is a discussion on Spark Plug Gap on AC Delco 41 110 Irradium Plugs. ac delco spark plugs. C $50.41. Answer Save. When it comes to replacing your spark and glow plugs, ACDelco offers a full line of Professional premium aftermarket and Specialty spark and glow plug products. Are ngk 3403 g-power spark plugs pre gapped(crown Victoria 1999 - Cars & Trucks question The Chevy HHR uses a modern electrical distributorless ignition system, meaning that it does not utilize a distributor and spark plug wires, but instead a coil pack to deliver controlled electrical power to fire the spark plugs. A list of some of the most common symptoms of incorrectly gapped spark plugs is laid out below. Not sure if thats changed in newer models. In most cases, that gap is indicated on the package. The proper AC Delco plug for 2000-2004 is #41-987, for pre-2000 it's #41-950. Spark Plug Gap on AC Delco 41 110 Irradium Plugs. It should be noted that you should ALWAYS check the gap prior to installation to verify that it is within specifications. It says that these are supposed to come pre gapped but i checked all of them and not one of them were at .040 and they were all at random gaps. Does this mean they are pre-gapped to what it should be at [.060 inch] Also does it need a special torque rating or can u just tighten then do another 1/4 turn? Set Of 6 Spark Plugs Pre-Gapped .060 AcDelco For Buick Chevy Pontiac GMC V6 APPLICATIONS Cadillac Allante 4.5 V8 GAS FI -cc, 8, -, , Original Equipment GAP .060 1989 - 1990 The AC Delco plats can be gapped if not properly gapped from the package. The irridium plugs come pre-gapped. I'll be able to torque the front plugs, but not the rear due to the intake. Motorcraft spark plugs come pre gapped. You need a feeler gauge to gap your spark plugs properly. Adjusting the distance between the two electrodes is called gapping your spark plugs. I have a 99 Chevy Tahoe and I just pulled a new set of AC Delco 41-993's spark plugs out of the box and they appear to be gapped at .040 vs the .060 that … C $6.72. 7 results for ac delco 41-985 spark plugs Save ac delco 41-985 spark plugs to get e-mail alerts and updates on your eBay Feed. OEM LF4/LF3 spark plugs are AC Delco 41-147, 12662396, iridium, gapped between .030 and .035″. 0 0. Set Of 8 Spark Plugs Pre-Gapped .060 AcDelco For Caddy GMC K3500 Chevy C1500 V8 GMC C3500 5.7 V8 CNG FI -cc, Gap .060 1997 - 1999 GMC C3500 7.4 V8 GAS FI -cc, Gap .060 1996 - 2000 9 Answers. ! › Change Vehicle Review Fitment Notes to Ensure Proper Fit NGK iridiums for my truck are the exact same plug as the AC Delco plugs. I cleared the misfire codes and they have not returned. • The new spark plug, P/N 12571164 with AC Delco P/N 41-985, is gapped to 1.01 mm (0.040 in) when the spark plug is made. Top Rated Seller. 0 1 2. The original plugs in most 2000 - 2002 Northstars were DENSO and the owner's manuals give that plug number. The spark plug is what started it all for ACDelco. With the original plugs, now gapped at 063, hp increased to 186. Changing the plugs this weekend with OEM: AC Delco: 41-109. Favourite answer. 1 decade ago. Split Fire plugs achieved 184 hp but required 067 gaps. This is a discussion on AC Delco 9mm wires & AC Delco Iridium plugs within the External Engine forums, part of the LSx Technical Help Section category; I read the sticky above ... but could not find any mention of the 9mm wires from Ac Delco. 2012 Impala LTZ - 3.6L. Images in this review 6 people found this helpful. The #1 Seller of Genuine Champion Plugs on eBay. I bought AC-delco's spark plugs and was wondering if the factory gaps them to specs before shipment? Hi All, I've searched and searched but haven't found concrete info. :mad: 94 replacement spark plugs for AC Delco R44LTS. 1 product rating - AC Delco Spark Plugs R44LTS set of 2. Moderator edit: Good info, also posted for years in here (Post #13), Deville, and Northstar. After reassembly, the engine fired instantly and ran much smoother at idle. ACDelco RAPIDFIRE platinum spark plugs fit engines that require conventional or platinum plugs—offering quicker throttle response, smoother idle, better corrosion protection, and greater longevity when compared to conventional plugs. Mar 22 2013, 10:13pm. From the old to the new and even the nonautomotive, ACDelco has spark plugs to fit just about every need. We stock these Spark Plugs brands for the Chevrolet P30: AC Delco, E3 Spark Plugs, NGK, DIY Solutions, Denso, Autolite, Bosch, SKP and Motorcraft. Customer Satisfaction Guarantee Technician Warranty Has this feature Depends on manufacturer or part number No precious metal .4MM not OE design Double Iridium Spark Plugs Not all spark plugs are created equal. AC delco are a supplier for chevy that happen to make spark plugs denso are a japanese company that also make spark plugs NGK... make spark plugs there could be any number of differences between your 2 plugs, but without the part numbers that go with them, could be anyones guess. Any new spark plug found to not be properly gapped should not be used. When you buy your AC-Delco recommended spark plugs, the person who identified the spark plugs for you at the parts shop can find the gap on the computer he used to identify, and gap them for you. Spark Plugs Technical Information ... Bosch Spark Plugs are pre-gapped at the factory. If not do not use anything else but a stock delco or a … Spark Plugs Technical Information ... Bosch Spark Plugs are pre-gapped at the factory. I installed the new AC Delco plugs and they threaded in MUCH easier. Yes they usually come pre-gapped but during shipment they can be knocked around, So I'd always check to be sure they're properly gapped with the specs. See Answer. so I searched through the Forums and find Gaps of .045 to … These Double Platinum Spark Plugs are the high quality replacements for many vehicles on the road today. Chevrolet recommends changing your HHR's spark plugs every 100,000 miles. If the gap is adjustable and different from the gap specified by the engine manufacturer, it needs to be adjusted. In short, if you want your GM car to run well - spend the literal couple of extra $ and get AC Delco plugs. Mar 22 2013, 8:53pm. Relevance. This not only cuts down on parts needed, but makes for a much more efficient ignition system. AC Delco 9mm wires & AC Delco Iridium plugs. There’s a common misconception that the best choice for replacement spark plugs … Pre-Gapped Laser Welded Ground Electrode High Content Iridium Center Electrode 7 Yr. Top Answer. See cross reference chart for AC Delco R44LTS and more than 80.000 other spark plugs. Now, with over 100 years of innovation behind each spark plug, you know you’re covered. Notice: The spark plug gap is set during manufacturing and should not be changed or damage to the spark plug may result. For ... AC R43NTS8 or Motorcraft AWSF42C) to facilitate Wiki User Answered . Asked by Wiki User. AC Delco is all I will use in my GM vehicles. Brisk Silver Racing spark plugs are a better option than Denso or NGK iridium spark plugs for those wanting a plug that’s pre-gapped and offers maximum performance. Then Jacobs installed one of his ign systems. Find ACDelco 19307138 ACDelco RAPIDFIRE Performance Platinum Spark Plugs and get Free Shipping on Orders Over $99 at Summit Racing! 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