Hello - hope someone can hep or let me know their opinion here. I have a sierra stock car which uses a 1.6 pinto. It starts OK and sounds fine when parked even when hot but once I'm racing after it gets hot it starts dying under load - if I back off the throttle or dip the clutch (then wait for it to pick up) its OK for a few seconds and then splutters again.

I got the car earlier this year and it was supposedly running fine before. Have tried tweaking the timing slightly but doesn't seem to help (so its back where it was).

Am now thinking its the coil but am up for suggestions.
Also - is it worth getting electronic ignition (has got standard points distributor at the mo)? My reservation is that its got a non standard cam and carbs so don't know if the standard 1.6 ignition curve would cause problems at high revs and I don't have the knowledge to sort that. :-(

Thanks for any help.

Bob

 

Sounds more like fuel starvation, are the float height correct, could always up fuel height a touch, or check the fuel pressure, what carb/s are they.
Could be the coil but they usually just stop when hot or misfire permanently until cooled a bit.
A lecktronic dizzy etc could be used, if different cam/and or carbs are used the igntion curve is highly likely to be a million miles out for best running.
Usually needs a lot more intial advance but less total, this can be achieved by bending the stops, get it running perfect low down, check to see timing figure is, then progressively bend tab in to limit total advance, if too much advance would likely cause a bit of damage long term, failing that it's a dizzy swing on a dyno equipped with dizzy plotter etc.
tabetha

 

Thanks for the reply Tabehta - the carbs are 2l sierra carbs. I was also thinking fuel but as the carb was supposedly running fine before i was thinking more along the lines of something breaking down. Am also going to try a the higher octane super unleaded next time - do you reckon that will make much difference?
Bob