4.3L Ecotec3 V6 Engine Problems - What Are You Experiencing?

Questions and Support
21

I wouldn’t doubt it, qflores. My car even threw a code right after I filled up with gas, but then it went away right before I got to the mechanic!

22

Sometimes, it just feels like a game of hide and seek with these engines. I keep checking and getting nothing!

23

I hear you too! Maybe we should form a support group for confused Ecotec3 V6 owners. Meetings could be at the repair shop!

1 Like
24

I’ve been experiencing significant fuel efficiency issues with my 4.3L Ecotec3. I usually get around 15 mpg in the city, which seems below average. Has anyone else noticed this?

2 Likes
25

Wow, that’s frustrating! My fuel efficiency is better, around 18 mpg, but I’ve definitely felt a lack of power on hills. It’s concerning for sure.

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26

I’ve had power issues too. Sometimes it feels like there’s hesitation when I accelerate. Has anyone found a solution to this problem?

27

I can relate! I thought it might be a fuel filter issue, but I’m still looking for answers. Anyone else had a mechanic diagnose this?

5 Likes
28

I’m having a rough time with the long-term durability of my engine. It’s just shy of 100k miles, and I’m hearing strange noises. Is this normal for the Ecotec3?

29

That sounds ominous! I’d recommend getting it checked out ASAP. Better to be safe than sorry!

30

Fuel efficiency and power are definitely inconsistent with this engine. But hey, at least it sounds cool when it’s running! Does anyone else appreciate its roar?

31

Haha, true! But I wish the roar translated to better performance. It’s like having a sports car that can’t run the track!

32

Has anyone run into transmission issues? Mine has been acting up lately, particularly when shifting gears. I feel like the whole system isn’t in sync.

33

That’s frustrating! I’ve noticed my transmission starts to slip when I’m climbing steep grades. I wonder if there’s a common link here?

5 Likes
34

Let’s not forget how this engine is perceived overall. I’ve read mixed reviews, but I’m hoping the newer models are better. Are there any major improvements in recent models?

35

I’ve heard they’ve tweaked the fuel injectors and mapping for better efficiency. Might be worth looking into if you’re considering upgrades.

1 Like