[allinkedup]

Well Brad this could be alot of things, first always check the obvious. Start by making sure all of your harness connections are tight at the computer, which is in the passengers kick. If the computer has been replaced the connector might not be properly clicked in. Then also check your coil, make sure all the connectors are tight there as well. Then, check the ignition amplifier it is located on the drivers side under the hood behind the airbox mounted against the the fender. Volvo does use great connectors on these things but hey you never know. Any loose connections on these modules would give you these symptoms. Could also be a distributor problem but thats a another story. Yikes! good luck bro!