Kaitro13 Posted June 21, 2020 Report Share Posted June 21, 2020 (edited) I had 2 cylinders misfiring, 2 and 3. Replaced all the spark plugs, and took to a shop to diagnose why it was still misfiring. They replaced 2nd and 3rd ignition coils. Previous shop replaced 2nd fuel injector, swearing that was the problem (didnt help misfire, but have 1 new fuel injector). Drove good for about 100 miles, then Check Engine lights came on with a P2197 code diagnostic. Replaced MAF because shop said that's most common issue with that code. I cleared the code, haven't had a problem since, but it still smells like something's burning under the hood. I'm not too mechanically inclined so I dont have a lot of tools or equipment but I'm trying to save money instead of throwing it into shops all the time. I was going to buy fuel injector cleaner and hope that eliminates the smell, buy does anyone know why it would still smell like burning? Is something still wrong? Edit: Its a sick sweet smell, only noticable in idle. Edited June 21, 2020 by Kaitro13 Quote Link to comment Share on other sites More sharing options...
Perblue Posted June 21, 2020 Report Share Posted June 21, 2020 A sweet smell is a coolant leak. If they had done something involving the coolant system I'd say it takes a while for it to burn off but from what you listed nothing would cause that from what they did. Look for wet or pooled coolant. You didn't mention year or engine but the water pump is driven by the timing chain and is common to fail after so long on the 3.5l, it could also be a head gasket leak, which would cause you missfire. Quote Link to comment Share on other sites More sharing options...
Kaitro13 Posted June 21, 2020 Author Report Share Posted June 21, 2020 Yeah, it's a 3.5l. During the misfire, could it have shaken the water pump loose? The engine was pretty shaky with 2 cylinders misfiring. Quote Link to comment Share on other sites More sharing options...
Perblue Posted June 22, 2020 Report Share Posted June 22, 2020 18 hours ago, Kaitro13 said: Yeah, it's a 3.5l. During the misfire, could it have shaken the water pump loose? The engine was pretty shaky with 2 cylinders misfiring. Not very likely, almost impossible, there are a lot of bolts. It is something you'll want to have looked at though if it turns out to be water pump, the likely culprit, or head gasket left too long it will take out your motor. 1 Quote Link to comment Share on other sites More sharing options...
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