VT 5.0 engine ruff idle

[hq-racing]

hey ppl, a cpple of weeks ago i did a plug n lead change to my 5.0 and a few days later it started idding a lill off but only when it warm..
i rechecked the timming, put it at 10degrees btdc its a lill smoother but still jumps at idle.. only a lill bit tho, enough to annoy..
i ran an code check n it came up wit rich o'2 sensor?
could that be the reason?
i was thinking maybe cracked plug or dodgey lead?
any ideas would be great.
thanks

[jesse'sVT5.0]

Hi hq,

Had what sounds like the same issue. The idle sounds rough and the tacho needle jumps when it is rough?

Mine turned out to be a burned out lead. Hope that helps.

Jez.

[hq-racing]

i just done the leads, so surely not but ya never know, i checked all the pugs 2day n they where fine the plugs are NGK BPR6EF n the gaps are 25tho, no cracks on them. all at 25...
what plugs n leads do you run on yours?

[Tree cutter]

Plug gap should be 40 thou.

[hq-racing]

any1 agree on this?
im well confussed now...

[hq-racing]

i will sus 2moro n let ya know! hope this works! cant wait to have it running properly again!

[hq-racing]

na made it worse!!!! now im defiently thinking it must be a lead!
its at my mechanics now to get my tailshaft rebuilt n new booster so they're gonna look at it for me! cant be bothered nemore! had enough!

[hq-racing]

traced it back to a dodgey coil and foul'd plug! thank F$%# thats over!