Does anybody know the whereabouts of the earth isolation relay in the md22 start system. Mine is [I think ] chattering on start as if making poor contact . I think it probably lives in the black box next to the fuel filter/bellhousing. On a related subject having had the same engine develope an oil leak from the oil pump I can confirm that Austin Montego/Maestro diesel fit [and cost £25 as compared to volvo £200 ish] Geoff