Rought starting sometimes and rev issue.

[Nidarus]

Originally Posted by Nidarus

well last night i tried starting it again with powercables from another car next to it. nothing happend for good 2 min then i thought about the "straw" method. if i would blow in the hose to the tank the only way the diesel would go is towards the engine, right? well i went to the back of the car by the gastank and unscrewed the "tank lid" guess what i heard... sounded like a fucking blackhole in space. so much vacuume so instead of trying to blow in to the tank i just opened the lid and tried starting, and after 5 sec of running on the starter it fired right up. so now the issue is fixed with hard starting, but still the pump is leaking and the rev issue is still there... and yes the pump is leaking on the sprocketshaft at the back of the pump toward the back of the egine, so the bosch seal have to be change, and i found a VE pump seal at a dieselpump re-builder also known as "dieselmeken". anyhow starting issue is fixed but i have no idea about the rev hook issue. thanks for you help guys!

later today im gonna go trought all the return lines, btw should i even change the ones between the nozzles?

hmm seems like you didnt read or maybe i misspelled, anyway the rev issue is that i "hooks" over 2000rpm when i let go of the pedal.

and yes he fixed there pump last summer when it brokedown in mantorp.
but their "main" pump guy is herlevi in finland

[ngoma]

Vacuum in the fuel tank: The vent tube is clogged. See if you can find it, a small metal tube facing down behind the rear wheel, under the fuel fill.

If fuel is leaking off the sprocket, you will for sure want to install a new IP belt, as the fuel deteriorates the belt. Also closely check the heater hoses in that area for deterioration.

If you can get some of the Volvo special tools, especially IP Pulley remover. P/N 9995204 21
Low-profile pulley remover will fit between IP and firewall

and

Lisle Shaft Type Seal Puller 58430


You should be able to R/R the shaft seal without removing the IP from the car.

See these other threads for more ideas:

IP air leak

Getting harder and harder to start

85 740 won't start

[Nidarus]

well issue being hard started is pretty much solved. but the issue with rev hookin is still there. and i really wanna remove the "smoke limiter"
well cheers guys and thanks alot for the help!

[ngoma]

What did you find that was causing the problem?