stuttering

[zapper]

While coming home the other day the motor started giving that lack of fuel feel under load,stuttering.
It even backfired on me.
I did replace the spark plugs and leads and felt a bit better but it didn’t completely solve the problem.
On flat road and light acceleration no signs but up a hill it all starts playing up.
Any thoughts what else I should be looking for.?

[Brett_jjj]

It might be a faulty coil,they break down under load.Borrow a coil from a mate and try it where each of your 3 coils go.The numbers on them dont matter,they are all the same.You can test them with a multimeter,but I have seen them show to be ok on a multimeter and still cause misfiring.Also check for any error codes.Checking error codes VR/VS (Revised)

[zapper]

The other thing I forgot to mention is sometimes say 1 in 30 starts the motor takes quite a few goes in getting it started,this never seems to be a problem when cold only when hot.
This can take upto 20 tries and 15-20 mins..it varies

[hako]

I'd go with Bretts advice - check for error codes. Unless you do this, the cause of your problem is anyone's guess.

[zapper]

Had a spare coil I carry around with me just in case.
Just had the chance swapping it out and took it for a drive and seems to be ok
I was always under the impression when they failed the whole motor stopped working.

Your advice was much appreciated
cheers

[JD]

FYI: if a coil is breaking down, it'll still run but its like if a lead is broken and do as you described ( unless its a series 1 VN then it won't lol )

[zapper-l67]

Yep mine done the same thing.
Just replaced the leads with some 10mm ones and problems gone.
I was talking to my mate at the Holden Service center and its a common problem after 100,00 kms. the fiberglass strands over the carbon threads breaks down with heat over time..

[boonga]

water in fuel. simmlar to my pops suzuki vitara