Hesitation at 2k rpm..

[Marty172]

Hi people, I'm new to this I need help fast, I hav a 172 and in every gear at about 2000 rpm I'd put the foot down and it would sputter a bit then pick up, I've just changed the oil and filter and put titanium plugs in, and is all still the same. Did any have this before..

 

[tadas]

I have something similar it sort of dies down, and after that it jumps back to life. Not too sure what could cause this, I have changed quite a few parts.

 

[Inequality Street]

Isn't a 2 - 3k flat spot common?

 

[KielT]

Had this issue, changed leads plugs and coil and kinda helped it. Then changed a injector problem solved

 

[tadas]

Isn't a 2 - 3k flat spot common?

It is not as much flat as it sort of dies down for a little bit instead of pulling.

 

[at3k-]

Mine does this also but only when cold, once warm it disappears. Probably what KielT said

 

[Marty172]

Engine management light came on last week, and said It there was a fault with the lambda sensor (the one nearest to the engine) so I deleted the problem and the light hasn't came back on.. Would you say that could be it...

 

[Jekyll]

I had a similar issue. I changed my lambda and problem solved.

 

[Marty172]

Thanks guys ill change it pretty soon

 

[tadas]

Thats what it is!!! It also shows the same error. How much is the new lambda?

 

[Jekyll]

£65 from north west performance

http://www.northwestperformance.co.uk/product_info.php?products_id=112

 

[Guvna!]

Got the same problem with my 172. Pretty sure it's the lambda because it STINKS of petrol on tick over.

 

[Marty172]

Ya I only getting 32-34 mpg average..

 

[tadas]

How hard is it to change the front sensor? Just take old one out and plug the new one in?

 

[Oz172cup]

I get the same but only on start up. I got new lambdas, coil packs and NGK's. Could it be a sticky injector, if so how easy is it to find out which one it could be?

 

[Jekyll]

How hard is it to change the front sensor? Just take old one out and plug the new one in?

Yes. They bolt in one end and are clipped in the other end. Beware that if you have big hands its might be awkward to undo the clipped part as where it is there's not a lot of room and it can be fiddly. I used an adjustable spanner on the bolted end as I didn't have the correct size spanner, but it may be quite tough to undo.

 

[Marty172]

Is it possible to take out the lambda and clean it with carb cleaner and sand it??

 

[Oz172cup]

I tried cleaning mine first, but a week later started running rough again so changed it n it went back to running ok. Not sure about sanding it, im sure u would just do more damage than good, but im no expert.