any ideas why this happened. Van had flat battery was was bump started. I got a battery pack on it today the jump it and started fine and idles fine but is popping when under load. If I drive really carefully then I get no pops. Could a bump start throw out the timing. I've not long had the van and up until now it's been driving like a dream. Not being mechanically minded is there something obvious I could check for getting it looked at. I've posted a pic of the engine.
Most likely thing is a pipe popped off one of the carbs, if you post a better quality picture we may be able to spot it
