my 172 does not tick over smooth. help please!

[cinnes1987]

iv changed my spark plugs to try and cure the problem but the car still doesnt idel smooth. any help would be greatfull

 

[Stava]

Sounds fucked m8, lol

 

[vibez666]

Throttle body? Idle control valve? Air leak?

 

[jinjur]

Just to be clear, they all seem to be horrifically lumpy at idle. Really lunpy, almost like they are missing.

I recently remapped mine with RSTuner and with a raised idle, it is so much smoother.

Jj

 

[Simon@SprayShack]

Just to be clear, they all seem to be horrifically lumpy at idle. Really lunpy, almost like they are missing.

I recently remapped mine with RSTuner and with a raised idle, it is so much smoother.

Jj

Yep the idle is crap on them generally, try changing HT leads etc, thats what im doing, making sure the spark is good and clean.

 

[Mister_G]

Idle is rough on almost all of them, however, I cleaned my throttle body, and TDC sensor and changed sparks Cleaning TDC and throttle body is free and easy to do so a good place to start!

This helped alot. However, I've recently started running it on "premium" 97 unleaded and this has helped massively! I think they're designed to run on that kinda fuel anyway. Worth a try.

 

[not normal dan]

Idle is rough on almost all of them, however, I cleaned my throttle body, and TDC sensor and changed sparks Cleaning TDC and throttle body is free and easy to do so a good place to start!

This helped alot. However, I've recently started running it on "premium" 97 unleaded and this has helped massively! I think they're designed to run on that kinda fuel anyway. Worth a try.

Mine actually has a sticker inside the cap stating use of 98ron

 

[NEclio 172ph2]

Try air temp sensor m8 helped my idle. U had it on diagnostics yet ?

 

[S76Pilot]

they are supposed to run on 98 octane fuels. My alternator recently packed up. When I bought the car I suspected it might be on it's way out due to a slight burning electrical smell near the alternator after driving it a few miles. It eventually just packed up. The idle was really lumpy beforehand. Now it's much better with a new alternator fitted.

 

[Mister_G]

Mine actually has a sticker inside the cap stating use of 98ron

Oh right! lol well maybe it's 98 I put in, I don't know. It's the total excelcium stuff, only place near me that sells any "high octane" fuel.

 

[cinnes1987]

i use 99 octane from tesco. where is throttle body and tdc sensor?