I've got a 1990 740 with the B230F and after a cold start the revs stay a bit too low on idle. Something like 500rpm. If I pump the brakes the revs get up to where they are supposed to. When I stop the pumping the revs go back down.
Any ideas what could be causing this?
740 low idle, pumping brakes increases revs
-
volvolugnut
- Posts: 6231
- Joined: 19 January 2014
- Year and Model: 2001 V70
- Location: Oklahoma USA
- Has thanked: 927 times
- Been thanked: 1000 times
I suspect a vacuum leak in the power brake system.
vololugnut
vololugnut
The Fleet:
Volvo: 2001 V70 T5, 1986 244DL, 1983 245DL, 1975 245DL, 1959 PV544, multiple Volvo parts cars.
Mercedes: 2001 E320, 1973 280, 1974 280C, 1989 300E, 1988 300TE, 1979 300TD, parts cars.
2009 Smart Passion
Ford: 1977 F350, 1964 F150 (2), 1938 Tudor Sedan
Farmall tractors: 1956 400 Diesel, 1946 A
And others.
Volvo: 2001 V70 T5, 1986 244DL, 1983 245DL, 1975 245DL, 1959 PV544, multiple Volvo parts cars.
Mercedes: 2001 E320, 1973 280, 1974 280C, 1989 300E, 1988 300TE, 1979 300TD, parts cars.
2009 Smart Passion
Ford: 1977 F350, 1964 F150 (2), 1938 Tudor Sedan
Farmall tractors: 1956 400 Diesel, 1946 A
And others.
-
- Similar Topics
- Replies
- Views
- Last post
-
- 1 Replies
- 717 Views
-
Last post by matt5112
-
- 3 Replies
- 2004 Views
-
Last post by TheLemonZinger