Hello dear Volvians! Have a problem with my 70s ! B5252s approval 9/1997! I’ve been on season for quite some time in Western Austria! The car was now about 2 months under the most severe conditions snow cold etc. shoveled him last week free and started !!! sprang up immediately and ran like a 5nd should!! but only about 15min. until the operating temperature was reached. Died off and it helped everything not any more mucks!!! Today the same Scenario ran like ne a ns, operating temperature reached and out of no more mucks!! I have already checked ignition cable / plug – cables of the various sensors! What can that be???? I have neither readout device available nor Öamtc od ect. What I noticed when he just before operating temperature was no longer accepted gas or only hesitant! Would the petrol pressure regulator be a candidate????? Please for help or someone had something like that! Thank you in advance!