Before any diagnostics, spend some time under the hood simply looking for a vacuum hose or line that you knocked off.

How are your brakes? If your brake pedal is really hard to push, then it is a main line.

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1959 Gravely LI, 1963 Gravely L8, 1973 Gravely C12
1982 380SL
1978 450 SEL 6.9 euro restoration at 63% and climbing
1987 300 D
2005 CDI European Delivery
2006 CDI Handed down to daughter
2007 GL CDI. Wifes