Hi all, brand new here. To start, I've read all the literature on here before reaching out as I know that there are many common issues on the fit and it can be annoying when people are reaching out for already known and solved problems. I'm 19 and a broke ass college student so this car (2017 fit) is critical and I really can't replace it . Anyways, my fit with about 55k miles in the past 2000miles has had hesitation issues upon acceleration below 2500rpm I figured it's probably the coil packs going so I replaced all 4. Along with this, I just recently had an oil change along with replacing transmission fluid (cvt) so everything should be good order with that. The dealership did say that my car needed an intake valve cleaning because it was 'dirty' and I declined because $350 seems a little crazy. This made the problem slightly better for about 1000 miles then everything went downhill. Now driving the car it almost feels like it is bucking until it gets to speed. It feels like the car is bogging down massively upon accelerating where it cuts in and out as it accelerates especially under 2000-2500rpm. Unsure of what it could be but it seems like a bigger problem and I'm not getting any engine lights either. Could it be a clogged fuel injectors? Does the PCR or EGR valves have any effects similar to the above?

Thanks and sorry for the trouble, Velcro

 

Welcome. 55K seems awfully early for coilpack replacement. I'll start there.

When coilpacks go, they will look burnt out, with severe discoloration of the plastic. Did yours look like that?

If you replaced them and used aftermarket, that could be contributing. 3rd gen Fits have relatively inexpensive Honda OEM coilpacks (~$65 each) compared to previous gen Fits (~$100-125 each).

You want to avoid aftermarket coilpacks at all costs. They don't last long in a hot engine environment, meaning lifespans of days-weeks instead of years. Got to use the OEM if you want your engine to run well.

So if it's not the coilpacks, then what? We know that these engines are extremely susceptible to carbon buildup. I remember one case here where the buildup was so severe, the injectors were replaced at 11K. This is not that uncommon.

If you run TopTier fuel only, you get 20 times less carbon buildup. This is what the GK5 engine was designed for.

If you run non-TopTier fuel occasionally, you likely have some buildup. If you run non-TopTier fuel only, at 55K you could already have severe buildup.

One code to watch for is p0420, raw fuel getting into the cat. When my 2016 LX got p0420 at 88K, Honda replaced my injectors and rail at no charge.

I was lucky. My car was covered under an extended warranty for certain 2015-16 models. I haven't heard Honda extended this into later years, but they should.

All these engines turn into sludge if you don't run TopTier. It's that simple. I think that's why Honda dropped the Fit from the US market. They assumed people would have access to TopTier when they wouldn't, and this direct injection design came back to haunt them.

 

Yup, I bought hitachi igc0096 oem replacements. I just get whatever fuel normally but that makes sense so if that's the case is it even worth the $1000+ fuel injector repair because I don't think I would be able to do it (at least not in a day)? Aren't the injectors alone $200 or so? Very frusturating.