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Showing results for tags 'cold start'.
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I have a few problems on my 1.4 tdi polo, first is when doing a cold start it has a really rough start, when starting when it’s warm it is less rough but still quite rough. I have read it could be sensors, not enough fuel supplied, glow plug. I have checked for error codes and I had a camshaft sensor error but cleared it and it has not popped up since. Also when breaking gently it grips then let’s go and then grips and then let’s go, the break pedal bounces when that happens as well, also how do I fix the rear window heating. Only 3 heating lines work.
zob posted a topic in Engine, Transmission and ExhaustI've been busy after buying my '93 Mk2f 1.3 (SPI) polo giving it a full service and replacing any old or duff parts. The thing was running like hot garbage when I bought it but now is running great and doing just shy of 50mpg on a proper run. However... When starting cold it misfires on one cylinder, clearing up and idling properly when it warms up a bit (i.e. not ~90 degrees, just when its a bit warmer so still in the temperature-controlled fuelling schedule). This problem went away totally when the plugs and leads were changed a few hundred miles ago - it started on a dime and idled correctly from cold. However slowly but surely the misfire has crept back - its not a dealbreaker as it runs perfectly within a few minutes but all that chug-chug-chugging in the morning is quite frustrating! Things I've tried: * Cleaned the throttle body - no change to the misfire but picks up better once its warm * Plugs and leads are new, as is the distributor cap and rotor * Ignition timing 5 degrees before TDC, checked with a timing light - again a positive change here * Fuel filter new just before i bought it in November * New blue temp sensor - not OEM (Hella) but made no difference. * Checked for air leaks around the inlet manifold - none found and unlikely the cause because it runs great once warmed up? Also checked vaccum leaks and everything is airtight. Has anyone had this kind of cold misfire and found a solution outside of anything major? I know its Cylinder 1 from pulling leads when its misbehaving. Why should brand new plugs cure it temporarily? Could it be a dodgy tappet for cylinder 1? There's no excessively bad tappet noise but if one is taking extra long to puff up with oil could it be messing up the firing until it does?
moshiaiz posted a topic in Engine, Transmission and ExhaustHi, I have a Polo 6R 2013 with 1.2 TSI 105HP (CBZ) engine. I have a weird knocking/ticking noise especially on cold starts. It started around 2016... about 2-3 years after getting the car. You can hear it here between 0:03-0:04: Sometimes it lasts for around 1-2 seconds but not more than that. Anyone knows what it is? Thanks.
Hi I have a polo 6R 2013 1.4 (CGGB) I have been hearing a rattling noise for a few months now. The noise seems to happen only when the engine is cold but goes away when the engine warms up. I have changed the oil and flushed the engine before putting new oil in. This hasn't fixed the issue. When I drive the car the rattle is a lot more louder but goes away when warm. I have had the exhaust inspected and it's fine. The noise seems to be coming from the top of the engine. I don't know whether it's the tappets or even the piston. I help advice please Thanks Adil