loss of power

[nickshally]

Hi guys my 172 seems to have a loss of power when j get above 5k rpm, it is very random, sometimes does it right away once car gets to 5k instead of picking up like it should it still continues to rev but no where near like it should.
Also sometimes starts to pick up the bogs down a bit and will continue picking up again
Does not seem to be any pattern to it!
also heard a strange noise from rear passenger side of car when letting off the throttle even at low revs, a sort of vibrating/gargle sound, could it be related? Again sound comes and goes!
Any help would be greatly appreciated

 

[BoatNonce]

Have a word with Dan@SJM, he's a top bloke. I know Somerset's a bit far away but usually worth it.

Now I've tagged him he should be in this thread soon.

 

[nickshally]

Ideal cheers mate
Just want some help with rough ideas so at least know what to maybe check 1st etc

 

[BoatNonce]

It sounds to me like an inlet sensor maybe cocking up some of the AFRs, but I'm not too sure on that so I'll leave it to Dan who's more qualified than me.

It's not a misfire is it?

 

[nickshally]

I did think possibly a missfire but then would that not cause problems at lower revs too??
As below 5k it drives perfect at all times.

 

[Dan@SJM]

Certainly sounds like a sensor giving some funny readings. Which one, who knows. Ideally I'd like to put it on clip and see what the sensors are showing.

 

[nickshally]

Hi dan
How much would that be?

 

[Dan@SJM]

£45 for a CLiP test

 

[nickshally]

Where exactly are you mate?

 

[nickshally]

Quick update guys.
I had the car on my mates diagnostic computer and no faults were showing up .
Was going to replace plugs and leads next as a start and see how that goes, any suggestions of other things to maybe try??

 

[Dan@SJM]

Fault codes and diagnostics are 2 very different things. I'm based in street, somerset.

 

[nickshally]

dan@sjm you confident you could find the problem?

 

[grantynp3]

I'm having the exact same problem started beginning of this week , it can hit 5k and have its little kick perfect but then it can just bog down at times starting to worry me now and mines also no issues below 5

 

[Canary172]

dan@sjm you confident you could find the problem?

He's a specialist - I'm pretty sure he would find out what was wrong with it!

Hope you get everything sorted soon

 

[BoatNonce]

Get it up to Dan, he'll sort you out no problem.

 

[Dan@SJM]

dan@sjm you confident you could find the problem?

Yeh.

 

[nickshally]

All sorted thanks boys, changed plugs and leads and running perfect now

 

[scotty10]

Did you take it to Dan or sort it yourself

 

[Dan@SJM]

Nah I didn't see it. Tbh as it stands I'm Booking 2 weeks in advance currently.

 

[Oscar88]

Hesitation/poor performance

Component check sequence

Air filter
Air intake system/vacuum system - leaks/blockage
Fuel pressure/delivery rate/fuel pressure regulator
Condition of fuel/fuel filter
Engine coolant temperature (ECT) sensor
Throttle position (TP) sensor
Heated oxygen sensor (HO2S)
Intake air temperature (IAT) sensor
Injectors
Exhaust system/catalytic converter
Exhaust system - leaks
Engine control module (ECM)

 

[scotty10]

Christ 2 weeks, business is good then !

I wouldn't mind checking all that on my car to see if its running like it should.