Delphi will be all you need. Delphi are fine even on ST setups running 700+whp. There’s really no need for others.
Pros: reliable for high power
Vehicle:
BMW
Reviews of DELPHI parts For Business
Average Rating
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The manufacturer's average rating is calculated based on ratings of all its spare parts. It determines the place in the manufacturer ranking
3.8
Manufacturer Ranking
#104
150
Spare Parts
20
Country
USA
Website
delphi.com
Spare Parts
Comparisons
Stepdad recommended replacing ignition coils, so I purchased a 4 pack of Delphi GN 10369 from amazon. Sure enough, we just replaced the coils, and boom, it ran good as new (to me).
Pros: ran good as new, fixed misfire
Vehicle:
Acura TSX
Part number: GN 10369
The fuel filter is built into the pump assembly. They are basically non serviceable. I recommend the Delphi brand. A lot of those cheaper pumps will last about one year.
Pros: Delphi brand recommended
Cons: cheaper pumps short life
I have a 2017 Forte with the regular manual transmission 2L non-GDI engine. At about 19,000 miles I started getting a strange sudden drop in RPM at random times (idle or on freeway). I would mostly notice the loss in power when it dropped and it would return to normal usually in less than five seconds. Never got any codes and car ran great 99.9% of the time.
As I approached 23,000 miles it got more frequent and finally threw a P0302 (Cyl 2 Misfire). I inspected spark plugs first. To no surprise they were in great condition. I swapped cylinder 2's ignition coil to cylinder 3, cleared the codes with my scanner, and the coders all cleared. About two days later I got a P0303 (Cyl 3 Misfire).
I ordered a Delphi ignition coil (GN10877) on Rockauto to replace the suspect ignition coil. Haven't experienced the issue since. Car also idles so well now that I can't feel it in steering wheel or hear it at idle.
I had no idea how bad that ignition coil was until it was replaced and was still shocked that it started failing at 19,000 miles.
Pros: resolved misfire, smooth idle
Vehicle:
Kia
Mileage: 23000 km
Part number: GN10877
Yesterday I changed the fuel pump. After changing the fuel pump, I put the pump relay back in, turned the key to ON and listened for the pump to prime. After about 3 seconds, I turned the ignition on and the car started right up! I shut it off, cleaned up my mess, and about 20 minutes later I hopped in and started the car again. No issues. I drove it around the neighborhood and the thing runs great! That cutting out/lag/surging was gone, the engine felt powerful again, and the fuel gauge was back to working.
Pros: engine felt powerful, fuel gauge working
Cons: hard start after sitting
Mileage: 160000 km
Part number: DFG1003
I think the only difference is lifespan and reliability. I wouldn't cheap out on plug-on-coils because the budget companies don't take as much care with the wire insulation (apparently 2 different temperature ratings are acceptable, and the cheap companies use the lower temperature), coil material, or the epoxy that coats and insulates everything isn't as good or isn't applied as well.
Pros: lifespan and reliability
Cons: wire insulation quality
I went with (6 of each) Delphi GN10168 coils & NGK 2262 spark plugs. $150 with 5% discount + shipping. I hope I made a wise decision.
Vehicle:
Honda Odyssey
Part number: GN10168
Magneto rheological (MR) fluid has some pretty amazing properties. It can change from a low-viscosity liquid to a very stiff, nearly solid substance in milliseconds with the mere application of a magnetic field. Now that technology is heading from shock absorbers to engine mounts, and the first car to get the new mounts is the 2010 Porsche 911 GT3.
Pros: amazing properties, improves stability
Vehicle:
Porsche 911
What I have done since is change to delphi 415cc injectors which now idle fine and exhibit much better throttle response and run a haltuner O2 sensor to fine tune the mixture since the injector change. I am fairly confident the mixture is OK, I have used this haltuner on my supercharged 8v with good results and my spark plugs, if anything, look like they are on the rich side, a bit carboned up but not overly.
Pros: better throttle response, idle fine
Cons: spark plugs rich side
I finally figured out my issue was the fuel pump, so I dropped the half full tank on my sloped driveway very carefully and installed the Dephi fuel pump. Reinstalled and refilled the gas tank and it drove great for 3 trips. The first trip was to the gas station to fill the other half of the tank and the last trip was to my office to show off. Now the dang thing won't start again.
I found that all fuses and relays were fine and I am getting 12V power down to the fuel pump but the pump doesn't turn, so my obvious conclusion is that the Delphi fuel pump failed.
Pros: drove great initially
Cons: failed after 3 trips
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