guys,

experiencing rough idle on cold start up only. read a few posts and changed the pcv rubbers/springs/caps

started her up this morning, it has definetly improved the rough idle, so it now doesnt go for as long, it goes for about 15 seconds becuase of the exuast it just amplifies it so much.

what i have noticed though is when you start it cold, runs for a minute or so, and i think it must be when the thermostat opens up maybe? the engine revs drop a little and then the rough idle starts and goes away???

ive cleaned the MAF aswel.

my PCV rubbers where not ripped, however the new ones have had some affect but not completely got rid of the provlem. i cant hear any hissing or anything suggesting a vacum leak?

 

can anybody suggest some ideas or help please.

thanks

 

You may have a injector possibly leaking down. Try having them cleaned first.

 

Injector?

just really strange, when the engine revs drop a little from cold start as it warms up, then the whole engine changes note and runs rough for that 30-45 seconds?

almost like when the thermostat opens up or something?