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Read about it in the Bentley... okay sounds good to me.. where?
Page 240-17/18 shows the cold enrichment system for the 073 and 123 CPRs. That more or less makes sense. I'm working on the 85 which has no vacuum lines going to the CPR (so I assume it's a 128).
When I put the 85 back together for the first time I took a look at the 84 (which from all accounts doesn't have vacuum lines or a check valve going to the CPR either, but I haven't verified which CPR it has or if anything on the 84 is hooked up properly).
The next step was to look at the Volvo CI repair and maint manual.. my copy was printed in 82 before Bosch came up with the 123, let alone the 128.
The vacuum hoses off the TB are routed like this (on the 85):
The big line at the “top” of the TB goes under the intake manifold and disappears near the battery. The small line at the “top” of the TB goes to a T, one end goes to the distributor, the other follows the big line. The small line under those two goes to the valve in the head, the other nipple on the fitting goes to some thing on the firewall that looks like some sort of regulator with an electrical connection on the other end (cruise control?).
Another question that one of the brickboard smartass know-it-alls can hopefully answer (but it's gotta be run thru spell check first....):
Would a lean condition result in less vacuum being shown on the boost gauge?
How are your 85s hooked up?
The main fuel pump is squealing like a stuck pig (7/8 tank of gas here). I'm trying to track down the cause of the rough running. Before adjusting the timing and verifying the front pulleys were all lined up properly (the original cause for sure) I made the hamfisted decision to try and replace the injector seals. End result was a trashed #1 holder and fuel line (with the injector still on the line, and the date code impossible to read). I pulled the #1 injector+line from the wagon, placed an outter seal on the holder and installed it. Timing is 10-12 deg BTDC. Car now won't run under load at all (was driveable before). Visually inspected and retightened the air box cover and all the hoses on the passenger's side. The hoses from the intake manifold to the intercooler are fine (and tight). The fittings on the intake manifold are tight, the fittings on the distributor and head are as well. IM gasket is new (replaced when I put the head back on.. it's some sort of kevlar impregnated gasket that Nick sent out). Throttle body gasket is new (and the throttle body is properly affixed. Car idles okay for about thirty seconds, and then runs much rougher.. but still idles. Dies under load. So I'm thinking maybe the cold enrichment is giving it enough fuel to overcome some vacuum leak... but the fuel pumps can't keep up under load?
- alex
'85 244 Turbo
'84 245 Turbo
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