4 PCS *NEW* - DENSO #4503 PLATINUM T T Spark Plugs - PK16TT

Recently my Accord will not start up. I went to local auto shop for diagnosis. They want to charge me $698.77 (parts and labor) to replace distributor, spark plug and spark plug wire set. I bought all materials on Amazon for $107.18: distributor [https://amzn.to/2lStAMQ], spark plug wire set [https://amzn.to/2mDgrrs] and spark plug [https://amzn.to/2lUjAmp]The spark plug wire set has five wires. 4 for spark plugs, one for distributor. These are made in Japan. They are quality wires. It fits my 93 Honda Accord.You may need spark plug socket  OEMTOOLS Tools 22887 5/8 Inch 3/8 Inch Drive Magnetic Spark Plug Socket  to remove spark plugs if you don't already have it.Before removing the wires, please mark / take photo of how the existing wires are attached. Search for "Honda Accord Distributor Firing Order" on YouTube to get correct spark plug wiring.When I remove spark plugs, it has some oil on it, I wipe the socket clean using paper towel.Once it's removed, insert the new spark plug using socket wrench. Do NOT over-tighten the spark plug. I use just a bit of force after the socket is tight using regular force.I replace each wire on the spark plug then attach the other end to the distributor cap. Don't forget there is one extra wire you need to connect. When inserting the wire into the engine block / distributor, make sure you insert it completely.That's it.

Got these for a 1998 Saturn SL1 with the original engine and 170k miles.Perfect fit, and performs as expected.Dual platinum, so they are okay for the dual ignition system used on these.Single Platinum plugs will have 2 & 3 erode the ground electrode too quickly.These were still low enough cost that I could justify putting them in this car.They will probably outlast the engine at this point.The telltale signs of worn plugs on the Saturn S series is:* Rattling/tapping during hard acceleration with 87 octane* Gas mileage under 38 MPG on the interstate without the AC running.* Gas mileage under 30 MPG with the AC running.I did have to tweak the gap slightly. Make sure you don't press on the center electrode when gapping these. You don't want to crack the ceramic, nor scrape off the platinum layer.Note that these are half way between the OEM plug temps of the SL1 and the SL2. I'm in TX, so going half a step cooler is fine. Many charts just use the cooler temp of the SL2 for SL1 replacements now.

I bought these spark plugs for my daugther's suzuki Vitara with high mileage and they were the perfect OEM fit abd for a piece of the price you would pay at local auto parts, this was my best bet. Very happy with the performance of these spark plugs after installed. My daughter's SUV now feels with a smoothly idling and better response.

Replaced my spark plugs on a 05 Toyota Prius 12/30/16. No previous issues, just reached 155k and finally had time to swap them out. May be a placebo, but I think the engine runs smoother. Currently 4/17/17 and it runs well. Just achieved the highest mpg with the vehicle ever at 53.6 mpg. That same 81 mile trip had been completed many times before and maxed 51.4 mpg. Weather has a lot to impact the Prius mileage, but all other factors remained constant including the tires and pressure of 38 psi. I find prime mileage in the Prius to be with little to no wind, cloudy (no ac, heat, or windows down) and in the high 50's to the high 60's.

They work perfectly fine in our Toyota 2006 Prius despite not being the pricier Iridium electrode spark plugs. They'll not last as long, in theory. The electrode gap as shipped was close to the specifications but I tweaked the gap to perfection with a leaf gauge, then installed. Applied some anti-seize grease to the threads so the next removal of the plugs, if this car lasts that long, won't be so scary to remove (and possibly break the porcelain during the struggle). I used a piece of rubber tubing to start the plug into the cylinder head holes to avoid any cross-threading. Any resistance, STOP, try again. Use a torque wrench.

This is the first time I have used Denso Platinum plugs, I always use platinum plugs but my last supplier no longer carries platinum. So I am trying Denso I put them in my car to see how well they work. So far they have held up to city driving and my gas mileage has incrested a little. So far I am happy with them.They are also rightly priced.

4 stars may not be accurate. The gauge I used to measure the gap may not be accurate as well. The car runs and they seem to work. The gap between all 4 plugs seem to be different. I am not a mechanic and I am purchasing a new gap gauge for the next run.

4 PCSNEW -- DENSO #4503 PLATINUM T T Spark...Had to regap them all to the spec. All gaps were set at 0.040 or a bit smaller.Working good so far / no missing fire since last couple months.Like it.

Very good