90 model laser dizzy problems

[mika28au]

G'day people my friend has a 90 model laser 1.8ltr and under acceleration the car really struggles at low revs, but once the revs are up the cars runs alright. I had a ford corsair which had the same problem but was fixed when I replaced the small circuit board (THINGY) under the rotor button, could this be the same as the laser. if so what is the name of this part and where could I buy it from other than going to a ford dealer $$$. any info would be appreciated.