ACDelco D521C Ignition System: Original Equipment for Optimal Performance Review

If you have 1.4L, just buy it. I paired it with ACDelco 41-121 Iridium spark plugs and it solved all sorts of problems. My engine used to have a terrible idle and now it runs smooth. It also has more initial power. Great part, great result!

Replaced a corroded coil on a 2013 Volt that was causing multiple cylinders to misfire. Supplied with pre-lubricated rubber boots and fittings. I added extra dielectric grease to the inner and outer mating surfaces of the boot to reduce the chance of corrosion again. Now he runs like a champion. Appears to be a genuine GM part.

Looked like the original, the assembly is simple. The local auto parts store wanted almost twice as much for the Duralast. Saved the kit for 2 days of waiting and got an OEM part. Check Engine illuminates when code 0300 is issued (random misfire). The car gave frequent misfires at all speeds, but mostly under heavy loads. The odd thing was that only 1 cylinder looked bad on the original spool so 0304 should have been fitted instead. I was glad that the new coil pack solved the problem.

This ignition coil is easy to install. The only problem I had was pulling off the old spool. The old coil had to be replaced because my Cruze lost power at the slightest lift and would stall. When the old coil was removed, one of the spark plug caps broke and the spark plug was coated with a white powdery substance. The second problem was that another spark plug wire had come loose from the coil. This replacement coil (along with a new set of spark plugs) fixed the problem. I have driven over…

I had an engine problem for a while but I just couldn't figure out what the problem was. In the end they told me that the ignition coil was defective. After purchasing this product and having it delivered to your home. He went to the car, took off the old one and put on the new one. Before installing the new one, I compared it with the old one. All boots were found to have cracks and the inside of the boots where they connect to the spark plug looked poor. After installing the new one, I had to

My wife's car is a 2015 Chevy Cruze 1.4 Ecotec Turbo. It had misfires in cylinder 1 after I hooked up a scanner the check engine light was flashing and the service stall trace as well as the service traction control light was on the dash, I changed spark plugs and ignition coil and less than half an hour and the car works the same like when we bought it brand new. I hope this helps someone because when I searched for this I didn't see all three symptoms together in one post, I wrote it last…