Hey guys, got a problem with my 3k at idle (well i think its only at idle), basically i've rebuilt the motor about 2500km ago and just rebuilt the carby on sunday because of flat spots and hesistation and stuff. But even before the rebuild (of the carby) the engine doesn't seem to idle smooth at all, a mechanic said the 3k is a really smooth motor and can run down to 400rpm but mine barely does 800....the rebuild was completely stock (so no bigger cam or pistons) the only thing i can think of is the timing chain is 1 tooth out or something.....and when i say "i think its only at idle" i mean i don't think its producing as much power as it should and yes i know 1.2L is not a power machine when stock but still something is a bit weird, any thought?

Edited March 2, 201016 yr by jono1986

get a vacuum gauge on her!

 

mine had a miss at idle, the chart said worn valve guides :blinks:

Edited March 2, 201016 yr by Evan G

Well actually thats a bit interesting cause i got the whole motor rebuilt, including the head but you say worn valve guides. The reason i say thats interesting because it blows a little bit of smoke after its been sitting overnight which is a sign of the valve guides, which makes it even more interesting when i got a complete head rebuild...might try the vacuum guage

the oil in the morning would be valve stem seals (who rebuilt your engine?)

 

but yea diffently get a vacuum gauge on asap

the oil in the morning would be valve stem seals (who rebuilt your engine?)

 

but yea diffently get a vacuum gauge on asap

 

Where exactly does the vacuum guage go?

 

Me and my dad rebuilt the bottom end and i got a company to do the head...and i did the carby

just a vacuum port under the carby