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 fuel flow rate 87 Raider
#1063202
08/23/13 09:33 PM
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Joined: May 2009
Posts: 56
OP
Getting the Wheeling Fever
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Hello, does anyone know what the fuel pump flow rate should be for an 87 Raider?
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Re: fuel flow rate 87 Raider
[Re: 87Raider]
#1063203
08/23/13 11:01 PM
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Joined: Jan 2001
Posts: 13,649
Web Wheeler
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It should be fairly easy to calculate. Assume a worst case of say, 5mpg at wot at 60mph, That's 1 gallon per minute.
Seriously, if the pump when manually activated blows your finger off the two outlets, and holds suction at the inlet, it's fine. If you can blow thru the filter in the flow direction, it's probably ok, too. If you can blow towards the tank and hear bubbles in the tank, the line is probably ok.tt
Last edited by fasteddy; 08/23/13 11:55 PM.
Not responsible for advice not taken...
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Re: fuel flow rate 87 Raider
[Re: fasteddy]
#1063204
08/24/13 02:51 AM
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Joined: May 2009
Posts: 56
OP
Getting the Wheeling Fever
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Cool! I have another question, the vacuum line that goes from the back area of the EGR valve to the device box ( not the line on top of the valve) is it supposed to have vacuum or blow air? Mine is blowing air and I have no power.
Last edited by 87Raider; 08/24/13 02:53 AM.
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Re: fuel flow rate 87 Raider
[Re: 87Raider]
#1063205
08/24/13 04:53 AM
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Joined: Feb 2005
Posts: 7,458
Trail Leader
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Start looking for a bad intake valve, seems to me. Only pressure the engine generates is during the compression strokes and after ignition of the AF mixture.
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Re: fuel flow rate 87 Raider
[Re: rxinhed]
#1063206
08/24/13 03:33 PM
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Joined: May 2009
Posts: 56
OP
Getting the Wheeling Fever
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Think i'll pull the EGR valve first, the engine only has 30000 miles on it. Thanks
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Re: fuel flow rate 87 Raider
[Re: 87Raider]
#1063207
08/24/13 04:44 PM
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Joined: Feb 2005
Posts: 7,458
Trail Leader
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The diaphragm on the EGR valves opens to a vacuum signal. If, upon removal of the EGR valve, you run the engine, your finger should be sucked down on the hole, not blown off.
I've seen burned valves on engines with very low time after rebuilds. Your issue may be a valve that isn't seating, piston rings, valve seals...something that is designed to hold combustion pressure in the cylinder and is being overpowered.
Make sure the PCV valve is functioning, too.
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Re: fuel flow rate 87 Raider
[Re: rxinhed]
#1063208
08/24/13 06:42 PM
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Joined: Jan 2001
Posts: 13,649
Web Wheeler
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If the egr valve is leaking internally, you can get exh pressured air out the vac connection. That's the only source of pressure I can think of.
Not responsible for advice not taken...
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Re: fuel flow rate 87 Raider
[Re: fasteddy]
#1063209
08/24/13 06:54 PM
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Joined: May 2009
Posts: 56
OP
Getting the Wheeling Fever
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I did the EGR test in the FSM, It Failed!
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Re: fuel flow rate 87 Raider
[Re: 87Raider]
#1063210
08/24/13 07:13 PM
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Joined: Jan 2001
Posts: 13,649
Web Wheeler
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I did some chart hunting, and that port goes to the exhaust pressure port and is used to close the vacuum regulating valve in the device box. It's supposed to have pressure...
Not responsible for advice not taken...
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