Need help car idleing erratically

[tomparkes]

My '53 AUM had been idling pretty rough (wasn't getting huge fluctuations in revs, but it wasn't at all smooth and was starting to get on my nerves) - I was also having dips in power in low revs and it was driving jerky in first and second gear.

I checked all my hoses, and it turned out the hose on top of the DV was ever so slightly loose, so I pressed it right down and tightened the clamp a little. While I was at it I also removed all the spark plugs and gave them a clean with carb-cleaner and checked the gaps (had to adjust 2 out of 4 as they were slightly too narrow). Car's been completely sweet since, so I don't know if it was a boost leak caused by the DV hose not being fully connected, or whether my spark plugs weren't in the best condition, but one of the two has sorted my problem.

Could be different to your problem of course, but with a rough idle it's surely worth checking the spark plugs - do you get any flat spots/loss of power, and is it jerky when you're driving at all or just at idle?

[novadragon007]

Once its off idle it does seem to go very well its just burning loads of petrol so im thinkin vac leak and boost leak. Ive hooked up a compressor and found my dv is leaking under pressure but its not the piston its the threads on the outlet tube that are leaking(its a cheap one so ill be replacing it again) but i cant find another leak, how big would the leak have to be to cause this or can the smallest of leaks show these symptoms?

[Jazz-blue-Wayne]

Could a blocked injector cause the idleing problem 

[novadragon007]

Could a blocked injector cause the idleing problem

i did think that at the beginning but surely a blocked injector would show throughout the rev range, nit sure what yours is like but mine has okay power over 1000 rpm.

[Jazz-blue-Wayne]

It a little bit lumpy on idle when it's 800
Then revs up
I've booked it at r-tech see if an fix it
nick said it mite have bit of dirt in one

[novadragon007]

well ive got all the stuff coming for a catch can install so im gonna do that to eliminate the pcv system, ill do the n249 bypass while im there and ive got an agu turbo to pancake pipe to fit that way i should have eliminated the likely culprits for vac leaks, after that ill have them check for a blocked injector lol

[novadragon007]

well agu turbo pipe on and so far theres been no 17705 code so im feeling pretty confident thats gone but i am still getting the erattic idle and cut outs when clutch is dipped? Did r-tech get a look at your injectors?

was reading a post on ukmkivs and a couple of them have had surging and hesitation and a bit of idle problems, theyve managed to trace it back to a rocker cover gasket
http://uk-mkivs.net/forums/t/420787.aspx?PageIndex=6
 so was gonna do that next and rule it out aswell just need a torque wrench.

[Jazz-blue-Wayne]

Not been to r-tech yet going on the 5th
Ive got a new rocker cover gasket as the old one is leaking
Going to do the in the week and change the oil to
See if it still does it

[novadragon007]

well ive just done my oil dipstick tube which was in 2 bits  didnt notice till it came out was hanging by a thread and had a jolly old time getting the broken piece off the tube. Fixed my idle somewhat, only nearly cuts out now when i dip the clutch and the idle is a whole lot smoother so i reckon ive still got a vac leak there somewhere and i get the feeling its in the pcv system so thats a task for next week once all my catch can bits get here.

[Jazz-blue-Wayne]

Ill get r tech to fix it for me
Do u know the torque for the rocker cover bolts mate