griffith mistery...pls help

[panic]

..sorry to bother everybody with this iussue (my griff 500)...but it's like a dark mistery...one day the car goes well only until warmed up (then is a disaster), the day after (like today) the car has NO malfunction at all...i have this griff since the '96 (and i'm the sole keeper until now), i bought it new, never had a major problem, engine is just rebuilt and upgraded: larger bosch airmeter, sport decatted exhaust, tripple cabon intake fm act, tuned chip...usually a thunder on silk.
the malfunctions, like stated in another previous post, are:

dont hold the idle
seems like electricity is cut (or fueling inj)
dark smoke if hammered.
rough cruising
half the usual performnce (or less).

these amenities happen only in the 'bad' days when hot...in the 'good' ones like today it goes as usual.

what's going on?

[Apache]

coil breaking down?

[pringli]

or overfuelling? ie thinks its cold so enrichment on?

[panic]

Apache said:

coil breaking down?

coil is new, i've changed and uprated it when i rebuilt the engine a few of months ago...

Edited by panic on Sunday 12th August 17:55

[panic]

pringli said:

or overfuelling? ie thinks its cold so enrichment on?

there could also be an overfuelling, infact, among the other iussues, it smells badly of fuel...there is no enrichment valve anymore because with the act tripple carbon inlet i found diff to install it (if i well remeber) BUT why y'day it drove me crazy and today i've driven the car for 150 miles (and in the traffic) and no sign of malfunction? (and maybe tomorrow it will go crap again..!!

Edited by panic on Sunday 12th August 17:59

[V8 GRF]

Dodgy connection on the stepper motor?

Edited to add

Probably isn't one on your set up?

Edited by V8 GRF on Sunday 12th August 20:26

[panic]

V8 GRF said:

Dodgy connection on the stepper motor?

Edited to add

Probably isn't one on your set up?

Edited by V8 GRF on Sunday 12th August 20:26

could you please tell me more about?