i hit the verge in the ice on Christmas day. it ripped off the front bumper on my rs seirra cosworth and punctured the radiator. i have got the new rad on now and filled with water. fitted the complete radiator, intercooler and fans.
Went to take it to the body shop today to have the new bumper spayed and fitted and have the stone chips in the bonnet sprayed. when i put my foot down it went the cut out for a couple of seconds the came back to life and went for a couple of seconds then cut out for 4 or 5 seconds again!!!!!!!!

any help please?

or even no what it could be ?

cheers gareth