Long Running Problem(Coil Packs)

[XRPete]

Hey guys have a long running problem even my tuner has run out of ideas. Car is a BA mk11. valve springs, monza, fuel pump. custom tuned 10psi.

Basically the problem is very inconsistent. it will happen 3 times one month and nothing the next. It will rev up to 3 or 4000rpm on cold start up, engine light come on and stall. Sometimes just cruising on the highway it will breakdown if I try to overtake. If I back off or changes gears the cars good again. Been doing it for over 12 months. Idle seems to be affected also, hunts quite a bit at lights and when idleing.

Most times it logs coilpack codes or sometimes "running rich" codes.

Coils packs were replaced 12months ago and have been retested recently. Sparkplugs changed. TB cleaned several times.

My ideas are maybe "tps" or idle motor, but that's just taking a stab in the dark.

Hope some one has got some ideas?

Cheers Pete

[TornadoJudd]

My BF F6 was doing the same thing replaced TPS and fixed problem. Hope that helps

[XRPete]

Thanks Judd. That was my thought, but my tuner keeps telling me that it should log a "tps" code, and doesn't wanna replace it unless it does. did yours?

And how much did it cost ya? I might just replace it and see what happens.

Cheers

[XRPete]

For future refernce guys changed the tps and car seems all good. Thanks Judd for the advice.

[stubbsy351]

hi pete,

how much was the TPS? might be after one for mine, as it seems to surge/breakdown between 2500/3000 rpm.

thanks