Power loss when engine warm

[Timmsy]

Well i noticed today that my 172 seems to be bit slower at initial pick up when the car is up to temp than it does from cold. not even giving it a thrashing when cold just really noticeable when pulling out of a junction etc

Is this fairly normal is something a miss?

Standard air intake so shouldn't be heat soak.

 

[imprezaworks]

They perform better when cold but it shouldn't be that noticeable when warm tbh

 

[Timmsy]

Just weird that when setting off in the morning its all good, half hour down the road after sitting in traffic it hesitates alot. Usually can pull away from a slow roll in second but once warm it just jerks around alot.

 

[ADS_V6]

i had a problem where it lost power when warm,even though i had 2 new coolant sensors they were faulty and the 3rd cured the power loss as car wasnt getting up to temp on time,thermostat maybe,

 

[imprezaworks]

What like a misfire? When was it last serviced mate

 

[Timmsy]

hmmm you could be onto something there, the needle doesn't sit dead in middle when warm just below. thought that was normal though.

 

[Timmsy]

What like a misfire? When was it last serviced mate

not really, almost like im a total noobie with the clutch and it kangaroos almost. certainly not the case though.
was serviced late last year. will be having another one next month anyway.

 

[imprezaworks]

If it was a stat issue it would be like a third of the way up. If it sits 'just' under half its fine.

 

[imprezaworks]

So when pulling away it kangaroos a bit?

 

[Timmsy]

Yeah rev's dip abit then all of a sudden it jerks forward and all is ok again. the more i think of it it sounds like something to do with fuel injectors possibly?

Edit: lets just say i'd feel comfortable pulling out of a junction in second if i've rolled upto it slowly when its cold, when warm i really don't trust it not to bog down and force me to go to first.

 

[imprezaworks]

It's allways hard to diagnose over the interwebz, especially as you know exactly what it's doing etc. I'm sure you know this, lol.

Could be anything really, coil on its way out, dirty plugs, etc etc.

 

[Timmsy]

Yep very true. Think I'll get the service done again and go from there.

Its either injectors but i doubt it, probably more plugs, leads or coil like you say. Definitely not right what ever it is.

 

[imprezaworks]

Has it just started acting up mate?

 

[Timmsy]

Usually don't give it any beans when cold as im usually straight into traffic when i leave the house so haven't noticed the difference. Tbh i think its been like it for a while though. i know the only thing that hasnt been changed in my ownership (18 months) is the plugs so that's probably somewhere to start

 

[GrahamS]

My 182 used to sit just a touch above centre on the temp gauge when warmed up properly. Next time I'm down your way I'll plug it into clip for you if you want.

 

[imprezaworks]

The only advice I can really give if you are trial and erroring it your self is start with the cheapest things first. Plugs would be a good start

 

[Timmsy]

My 182 used to sit just a touch above centre on the temp gauge when warmed up properly. Next time I'm down your way I'll plug it into clip for you if you want.

Cheers buddy, don't forget the head unit keys too (she's not noticed yet)

 

[GrahamS]

Cheers buddy, don't forget the head unit keys too (she's not noticed yet)

In the car waiting