Originally Posted by Rinty
It took 18 months to diagnose the intermittent HES problem with my wife's Volvo 740, so the time frame you describe seems very reasonable, if I may say so.
Two different shops, each having good people, worked on it four separate times.
I had 5 Volvos back in the mid 70s and early 80s. The first B21 engine had a Bosch mechanical FI system that was a nightmare (I believe Bosch called it Jetronic). The air module was connected to the engine with a long, plastic hose.
Volvo finally replaced that 1975 244 with a later model (245) with improved Bosch FI. I really liked that 76 245. I bought a slightly used 76 244 with an automatic. The auto trans never worked very well so I took it to an independent shop that dropped the pan only to find most of the clutch friction material sitting in the bottom of the pan. I was provided a new transmission by Volvo via the independent.
I have a soft spot for older Volvos. Those B21 engines were almost indestructible. The new ones? Too Expensive.