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Old 05-17-2018, 02:56 AM   #1
Join Date: Dec 2016
Location: Estonia, Pärnu
Default 244 wont rev


I have 86y 244. Just installed b230ft from 740 91y with 2.4 wiring harness.
Car starts fine and idle is normal, but revs dont go over 1000rpm. Checked all vacum hoses and dont see any vacum leaks. Engine oil smells bit like fuel. Can it be fuel pressure regulator or something else?
Thanks for answering
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Old 05-17-2018, 02:22 PM   #2
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Join Date: Jun 2002
Location: S NJ, a suburb of Phila.

Yes, it can be a regulator. I would at least check it by pulling the vacuum hose off and see if there is any fuel getting to the intake manifold from a leaky fuel pressure regulator. Do this with the engine off.

I would also check system pressure. To low a system pressure and the engine won't rev.
1982 242 turbo. 340k miles. Good stuff and lots of rust.
1993 245 Classic, 417k miles, enem V15. IPD bars and chassis braces. Simons sport exhaust from Scandix. sbabbs ezk chip. Been a good road warrior. Genuine Volvo rebuilt leaky M47.
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Old 05-18-2018, 11:54 AM   #3
Join Date: Dec 2016
Location: Estonia, Pärnu

No leak from fuel pressure regulator vacum hose. How can i test system pressure? Btw all motor gaskets is brand new and all vacum hoses are too
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Old 05-18-2018, 12:43 PM   #4
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Location: Rushing Lane, Scappoose, OR

Distributor can be off and the rotor can't make spark when you rev it up it advances the spark electronically and then there is too much of a gap between rotor and cap wire spot so it can't fire plugs. Turn distributor back a bit.

Or your fuel filter is real clogged.
1988 245 White slicktop M47 Wagon! 2.5L NA 8v going in.
1990 745 B230FT Getrag JohnV flywheel 240mm clutch 13c A-cam 3.54 G80 548K MILES
1991 740SE B230FT NPR Strut braces IPD bar A cam 550cc EV14's. 3.73 G80 M90 to put in.
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Old 05-18-2018, 01:58 PM   #5
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Join Date: May 2004
Location: St. Louis

How does the engine run when it plateaus at 1000 rpm?

Running well, jsut out of puff? Running rich and belching gassy fumes? Lean stumbles galore? Misfires everywhere?
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'93 245 16VT Classic #1141
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Old 05-18-2018, 02:30 PM   #6
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Join Date: Nov 2002
Location: California

Won't rev is commonly retarded ignition timing. Cam timing could be off too.
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Old 05-18-2018, 05:15 PM   #7
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Join Date: Sep 2005

is the throttle actually opening at all? maybe you connected the cable to the cruise control section? no idea if that is possible
are all linkages connected to the throttle valve/axel?
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