Rev limter cutting in to early?

[boldswede]

Hello, i had a broken throttle body on my 172 cup - was causing it to run bad and keep stalling and also the rev limit would cut in too early when driving to the red. so i bought another. Fitted it and the car is running like new but the rev limiter still cuts in too early about 500 rpm too early... any ideas?

 

[-Leigh-]

Re: Rev linter cutting in to early?

It's because the engine is detecting it's about to blow up. If you search there are plenty of topics on this. New engine time.

 

[Fred@BTM]

Re: Rev linter cutting in to early?

what does it rev to?

 

[boldswede]

7250 i my memory serves me correctly....

 

[Fred@BTM]

at the moment?

 

[boldswede]

Re: Rev linter cutting in to early?

It's because the engine is detecting it's about to blow up. If you search there are plenty of topics on this. New engine time.

it's only done 42k fully serviced and i recently serviced it....

 

[boldswede]

at the moment?

about 6750

 

[Nickharding]

There will be a log of the old broken throttle body in the ECU, even though you have fixed it, the ECU still has this log, get it plugged into a diagnostics machine and get it cleaned, will be back to normal

 

[boldswede]

There will be a log of the old broken throttle body in the ECU, even though you have fixed it, the ECU still has this log, get it plugged into a diagnostics machine and get it cleaned, will be back to normal

aaagh! makes sense. Would any garage have this or would it be a renault only job?

 

[Nickharding]

Renault can obviously do it, but most of my local garages have a diagnostics machine which have all the adapters for different cars, just try a local garage you can trust

 

[boldswede]

any one in oxfordshire got a diag machine to wipe my ecu for free?

 

[Greeny.]

any one in oxfordshire got a diag machine to wipe my ecu for free?

Or just an RS Tuner

 

[172cupwizard]

Disconnect battery for an hour

 

[boldswede]

I know i'm bringing up an old thread but I soon realised (i know im going to sound stupid saying this) i wasn't letting the engine warm up enough it seemed. These engines do take a while dont they, or is it just a charecteristic of my car? Once it gets nice and warm in revs to the maximum RPM. The temp gauge goes up to the normal level pretty quick but I guess its got to be at a certain point to "rag" it fully..

 

[Craigus]

I know i'm bringing up an old thread but I soon realised (i know im going to sound stupid saying this) i wasn't letting the engine warm up enough it seemed. These engines do take a while dont they, or is it just a charecteristic of my car? Once it gets nice and warm in revs to the maximum RPM. The temp gauge goes up to the normal level pretty quick but I guess its got to be at a certain point to "rag" it fully..

15 mins IIRC

 

[StevieGreenstuff]

The limit is dependant on oil temp, not water temp. It takes a little longer to warm the oil thoroughly, so even when the temp guage looks good the oil may still have a way to go.

If you drive it a bit harder it'll warm up a bit quicker, but I'd try and keep it from hitting either limiter if poss.

 

[Jonny1*2]

once the water gauge is horizontal, start to rev a bit more and the oil will soon get up there. 15min should be enough.

 

[Jamie]

Should have put oil temp and pressure sensors in the RSs like the Williams. I think some would be suprised at the length of time to heat up and the pressures when cold.

I do think the rev limiters air on the side of caution as I booted my old 172 where the Williams would be upto 80dc and the limiter cut in early. I was quite suprised.

 

[Ralphizzle]

^^^ That's what i keep telling... missing those gauges.
Still a full synth 5W40 oil WILL be up to temperature quickly to protect and to serve!

Rev limit is built into the ECU. Cutting off @ aprox. 6750 Rpm.
With a re-map she'll rev freer!

 

[cliosportcraig]

The limit is dependant on oil temp, not water temp. It takes a little longer to warm the oil thoroughly, so even when the temp guage looks good the oil may still have a way to go.

If you drive it a bit harder it'll warm up a bit quicker, but I'd try and keep it from hitting either limiter if poss.

FAIL

It's based on coolant temperature

 

[cliosportcraig]

 

[Ralphizzle]

Ooh... loverly!

Can we have the Acrobat PDF file too?
(where did you get it from, stealers workbook?)

 

[Ralphizzle]

Aah found it.: http://www.fastchip.nl/media/doc/clio2/F4R_730.pdf

Courtesy of Fastchip... Henk who else?

 

[boldswede]

well i'm glad it has been cutting in, i guess its stopping any damage of me pushing it when it's not hot enough.