Hi,

 

I dont use my Zed daily anymore, maybe 3 or 4 times a week - and recently when it's been really cold - it has been VERY LUMPY when starting from cold - after 2-4 mins all is well - but very cold starts require throttle control to keep her alive - until she settles!!! (hormonal car?????)

 

Any ideas. She has always been a fab cold starter!

 

Has already had (within 5K) New Plugs/new MAF/PTUv2/both temp sensors.

 

Thanx in advance.

 

AndyGP

 

andy@cheeandy.com

0774 616 6608

Any thoughts chaps? :bow:

Any thoughts chaps? :bow:

 

Hi Andy,

 

Mine is quite temperamental when starting from cold too. I've been told that the engine has one sticky valve which causes lumpy running when cold. Once warmed up (and the oil has had a chance to circulate properly) she runs fine. I don't have to give her any more gas to keep her ticking over but it does cause problems when coming to a stop - if I brake to hard she'll stall (and yes, I've got new PCV's in). Not sure what can be done about a sticky valve other than rebuilding the engine ... £££££ I don't know if your problem is identical to mine but I have also heard that a faulty fuel temp sensor can cause similar problems. Might be worth investigating if the sensor has corroded terminals.

 

HTH

 

Dan

Thanks Dan - do you (anyone) know how I can test the sensor?

I have a meter so...

 

A

Thanks Dan - do you (anyone) know how I can test the sensor?

I have a meter so...

 

A

 

If you've got access to a ConZult then it will come up as a fault code (can't remember off the top of my head what number though) or you could do an ECU diagnostic the old fashioned way (using the potentiometer on the ECU and counting flashes).

 

I'd first take the connector off and look for oxidation, clean it up and then do an ECU diagnostic/ConZult check.

 

HTH

 

Dan

 

PS - I'm not sure what voltages you're looking for when using a normal multi-meter. Perhaps it's stated in the user manual?