really need some help. my minds exhausted.
Thread Starter
Honda-Tech Member
Joined: Jun 2013
Posts: 16
Likes: 0
From: Alabama
really need some help. my minds exhausted.
Hey everyone. so im left at a point of scratching my head in trying to figure out this issues.
so i start from the beginning.
abour 2 years ago the car over heated, thermostat went out so we replaced it.
over the 2 years the car has gotten worse n worse.
so fast foward to about 5-6 months ago, the car starts misfiring BAD and having running issues. so decided to tackle the thing.
what ive replaced.-
Post car O2 sensor.
coolant temp sensor
Injectors
fuel rail
fuel filter
coils
spark plugs
MAP sensor
air temp sensor thats in the intake tube
iacv
vtec unit (screen and unit it self.)
checked timing and adjusted valves.
to present time -
so after replacing these units from what the codes say and from experience with honda's (not much with the k series engines but a lot with h and b series cars), the car still runs like ****. current codes are p0300,p0301,p0302,p0172, and p2646 (p03xx is misfire codes, p2646 is vtec code, and p0172 is fuel too rich). we need to get this thing fixed and running for atleast one more year that way we can trade it in on something new. its so bad that the car wont shift in to OD going 70 mph down a flat highway due to lack of power.
so my question, what could be wrong with it or do you think the engine is just shot after 300k miles and 7 trips with a ultra-lite camper behind it(only weighs 1100lbs so under the towing limits) from fl to the west coast.
so i start from the beginning.
abour 2 years ago the car over heated, thermostat went out so we replaced it.
over the 2 years the car has gotten worse n worse.
so fast foward to about 5-6 months ago, the car starts misfiring BAD and having running issues. so decided to tackle the thing.
what ive replaced.-
Post car O2 sensor.
coolant temp sensor
Injectors
fuel rail
fuel filter
coils
spark plugs
MAP sensor
air temp sensor thats in the intake tube
iacv
vtec unit (screen and unit it self.)
checked timing and adjusted valves.
to present time -
so after replacing these units from what the codes say and from experience with honda's (not much with the k series engines but a lot with h and b series cars), the car still runs like ****. current codes are p0300,p0301,p0302,p0172, and p2646 (p03xx is misfire codes, p2646 is vtec code, and p0172 is fuel too rich). we need to get this thing fixed and running for atleast one more year that way we can trade it in on something new. its so bad that the car wont shift in to OD going 70 mph down a flat highway due to lack of power.
so my question, what could be wrong with it or do you think the engine is just shot after 300k miles and 7 trips with a ultra-lite camper behind it(only weighs 1100lbs so under the towing limits) from fl to the west coast.
-Intl Steve Krew
Joined: Dec 2003
Posts: 6,752
Likes: 197
Re: really need some help. my minds exhausted.
Do a leakdown and compression test.
Check timing chain for stretch.
With that much mileage I'm thinking you're in for a major service. Something along the lines of timing chain replacement, head gasket or piston rings.
Check timing chain for stretch.
With that much mileage I'm thinking you're in for a major service. Something along the lines of timing chain replacement, head gasket or piston rings.
Honda-Tech Member
Joined: Jul 2016
Posts: 241
Likes: 18
From: Maryland
Re: really need some help. my minds exhausted.
You never stated what "the car" is. What's the year and model?
Given that the engine was overheated I'd say it's possible that you have some head warpage and the head gasket is no longer sealing, which could be your misfire issue. As Caoboy suggested a compression test would help spot this, but also you'd probably have found white smoke from your exhaust, coolant in the oil, and probably continued overheating. Any of those things true?
Given that the engine was overheated I'd say it's possible that you have some head warpage and the head gasket is no longer sealing, which could be your misfire issue. As Caoboy suggested a compression test would help spot this, but also you'd probably have found white smoke from your exhaust, coolant in the oil, and probably continued overheating. Any of those things true?
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