Poor idle hunting/misfire

[Jimmm]

Recently bought an ED30 and I have noticed that it idles poorly, seems like it's missing/hunting, is a lot worse on the cold start. The revs seem to slightly flutter by 100rpm if that? i thought it may have been the pcv valve but upon taking the oil filler of while running, it's made it run a whole lot worse then what it was. It had plugs about 20k ago(on 60 now) so I can't see it being that and surely a coil pack would chuck the light up?oh and I forgot to add that it's only on idle that it misses. Shall I just change the PCV for good measure seen as there a weak spot? Has anyone had this sort of problem?

Thanks in advance

[olethalb]

check for air leaks around the inlet and pcv pipes

[Jimmm]

Are the pips prone to failure?

[AndyBrown]

Recently bought an ED30 and I have noticed that it idles poorly, seems like it's missing/hunting, is a lot worse on the cold start. The revs seem to slightly flutter by 100rpm if that? i thought it may have been the pcv valve but upon taking the oil filler of while running, it's made it run a whole lot worse then what it was. It had plugs about 20k ago(on 60 now) so I can't see it being that and surely a coil pack would chuck the light up?oh and I forgot to add that it's only on idle that it misses. Shall I just change the PCV for good measure seen as there a weak spot? Has anyone had this sort of problem?

Thanks in advance

Mine was the same, changed pcv just in case and it sorted the problem.

[Jimmm]

I'm hopeful that it will be just that, I'll know more Saturday morning, only had the car 5 days and got do the inner tracks rods, I look forward to when it's running good tbh

[Jimmm]

Just had the pcv valve off and I can blown both ways if I blow gentle, if that makes sense? Makes me wonder if it is the pcv on the way out

[AndyBrown]

Mine did that aswell, same with removing the filler cap but changing it sorted it out for me.
Go for the cheapest/easiest option first if you can't identify the actual cause.

[Jimmm]

Yeah its going be the best thing now, did my inner track rods, and its take majority of the play out of the steering, still got the knock when shaking the steering so looks like it's going be a rack 

[Jimmm]

Changed the pcv valve and just my luck, it isn't that -_- any other ideas?

[AndyBrown]

Get it scanned see if there's any fault codes.
Plenty of people on here that will do it for you for some beer money.

[Tiggymala]

I had the same kind of issue my vacuum was dropping on torque app by 2.0 roughly every 10 seconds ish... I had no end of the air cover piece the notorious piece that can fall off and stick in fans.. obv happened to previous owner anyway replaced that that seem to go away but idle would flutter from 730-790 could feel a pulse every 4/5 seconds...

Did 2 seafoam treatments one last week one yesterday aswell as was doing a massive service on the car as it has 38k on it but had no service history few receipts so did everything for piece of mind which was Plugs, Cambelt & Waterpump, PCV, DV, Cam follower, Oil change, Transmission change, Fuel filter, Full coolant change and fixed damn reversing light/parking sensors plug replaced brake light bulb driver side... transmission bracket and mount replaced and cleaned exhaust tips and quick clean under engine bay do that properly another day!

But yea the PCV and DV that was taken off looked fine but in my case I reckon it must of been 1 of them cause it idles really nice now they was both really old revisions as well maybe could of been a spark plug too I fitted Rev N PCV, Rev G DV and BKR7EIX spark plugs did notice old plugs were BKR8EIX.

Non ED30 mind but after all that purrs like it is new now :) just roll on next week clean up wheel hubs, new tyres, paint calipers and wheels :)

[Disco stew]

Get a code reader on it and check, could be something as simple as a faulty Lambdar or sensor that requires cleaning.

[Jimmm]

I have already tried scanning with my ELM scanner and torque app, didn't show anything unfortunately. Think what I'll do is probably take it to my local specialist, get it diagnosed and then fix it myself.