F4R 172 Cup engine questions

[ex-Chinese Dave]

I had my car tuned by EFI about 18 months ago. The car runs fine but i'm sure recently I can hear a tiny bit of 'pinking' under hard acceleration recently. When it was tuned Chris found that the knock sensor was dead so we fitted his homemade one and that has stayed on since. The car made 168 bhp but it had a crap exhaust on it. Since the tune it's had an OEM spec system fitted (from the CAT back), new leads and a new coil pack. It had already had a full major service before it went in.

Should I order and fit a new knock sensor?

Since they are expensive (around £90) is this one ok to fit? https://www.autodoc.co.uk/ridex/8058948


Should I have another tune done at EFI? (probably will have to pay full price so not cheap and probably not worth it)

 

[Mr Trailer Man]

What fuel are you on?

Shouldn't be getting any knock really on these.

 

[Brigsy]

Before you do anything you need to verify if its actually knocking or not, datalog knock sensor to see if its pulling timing and/or det cans and check the fuelling. Usually if its audiable det itll be causing damage fast.

 

[ex-Chinese Dave]

What fuel are you on?

Shouldn't be getting any knock really on these.

95 RON

It had the standard map.

 

[ex-Chinese Dave]

Before you do anything you need to verify if its actually knocking or not, datalog knock sensor to see if its pulling timing and/or det cans and check the fuelling. Usually if its audiable det itll be causing damage fast.

I'll test it tomorrow on the M-way. Would anything show up on a code reader?

 

[chazza114]

95 RON

It had the standard map.

I find all 172/182's really suffer if you run them on 95, should really be on 97/99

 

[Brigsy]

I'll test it tomorrow on the M-way. Would anything show up on a code reader?

Not sure depends on what data you can get to show. If you were closer id stick rstuner on it for you to verify knock sensor is doing something or not.

 

[ex-Chinese Dave]

Not sure depends on what data you can get to show. If you were closer id stick rstuner on it for you to verify knock sensor is doing something or not.

Thanks for the offer. Would you suggest I get a new knock sensor and try it if I hear any pinking tomorrow?

 

[Brigsy]

Thanks for the offer. Would you suggest I get a new knock sensor and try it if I hear any pinking tomorrow?

Hard to say being honest, prob wont hurt. If you do change it torque to the correct spec as knock sensors can be very fussy. Im sure its around 20nm torque spec for it but might be wrong without looking.

Are you using your regular source of 95octane or a different garage? Could stick some super unleaded in to see of the noise dissappears

 

[ex-Chinese Dave]

Hard to say being honest, prob wont hurt. If you do change it torque to the correct spec as knock sensors can be very fussy. Im sure its around 20nm torque spec for it but might be wrong without looking.

Are you using your regular source of 95octane or a different garage? Could stick some super unleaded in to see of the noise dissappears

I always get fuel from Asda at Pilsworth each week. I've not fueled up from anywhere else in months.

 

[ex-Chinese Dave]

Is this the correct part ? https://www.autodoc.co.uk/ridex/8058948?tduid=ee8f24b4229ac52fc28fe7961bb1f1a3

 

[Brigsy]

Looks right from memory. Id go for a valeo one as not much more expensive.

 

[Mr Trailer Man]

May as well run it on Tesco 99.

Way cheaper than V Power.

 

[ex-Chinese Dave]

Looks right from memory. Id go for a valeo one as not much more expensive.

Ordered from Autodoc....and i've ordered the new radiator from there that will be fitted in the summer.

 

[ex-Chinese Dave]

May as well run it on Tesco 99.

Way cheaper than V Power.

£135.9 at Tesco where i'll move to as opposed to £127.6 for 95 at Asda now. If I need it it's not too much more but I know that it won't give any gains for a standard map.

 

[Mr Trailer Man]

£135.9 at Tesco where i'll move to as opposed to £127.6 for 95 at Asda now. If I need it it's not too much more but I know that it won't give any gains for a standard map.

About £4 over a full tank then.

 

[adamlstr]

Given that the Clio (and its fuel system) is >20 years old, I wouldn't be putting regular supermarket 95 RON E10 fuel anywhere near it.

Far better off putting a Super in, with lower ethanol content, and higher RON.

 

[ex-Chinese Dave]

Given that the Clio (and its fuel system) is >20 years old, I wouldn't be putting regular supermarket 95 RON E10 fuel anywhere near it.

Far better off putting a Super in, with lower ethanol content, and higher RON.

It's had a new fuel pump recently but i'll be giving it a try and see how it goes.