When I look at the fuel pump for the sedan and coupe, they look like the same part. When I look at the part catalogs, I see two different part numbers (16700-605-010 for the Z and 16700-551-025 for the coupe). Not sure why the different part numbers. They seem to have the same fuel pump specs.
So, the fuel pump which works for a coupe will also work in a sedan...... at least the pumps which were in the 1971 and 1972 vehicles. I don't have a 1970 vehicle any longer to check. If the fuel pump is not an exact replica, your issue is going to be getting it to fit in the compartment in the coupe.
Before replacing the fuel pump, you may want to test it. Page 14-23 of the sedan shop manual gives the test procedure. Here is how it is done;
1. remove the fuel pump
2. connect hoses to the inlet and outlet
3. position the fuel pump's inlet 19.7 inches above a container of fuel with the inlet hose placed into it
4. place the outlet hose into a container which is 19.7 inches above the fuel pumps outlet.
5. apply 12 volts to the fuel pump. The fuel will be pumped from the lower container to the upper container.
6. If the fuel pump is working correctly, it will deliver 250 cc (which is 250 milliliters or about 8 1/2 ounces) of fuel every minute.
The pressure at the outlet of the fuel pump is about 2 psi.
From your earlier description of a howling noise ..... that does not sound familiar. If it were a lack of fuel, the pump would be making a rapid clicking noise. Did the howling noise sound like it was coming from under the seat where the fuel pump is located or coming from somewhere behind you? You might have a problem with the fuel tank not being vented properly. The next time you hear the howling noise, loosen the gas cap and see if the noise goes away ..... just a wild guess since I can't experience what you have been hearing.
good luck,
Dale
> Hi Dale,
> I love all of you in this Honda group.Helpful and supportive!I > sent Lyle a post regarding a fuel pump put out by Auto Parts > Warehouse.Advertised as an exact fit for a 72 Honda 600.Airtex E8016S.
> Fuel
> pump-OE replacement.But,not sure if is for an N or Z come to think of it.Is > there a difference in where they are? Wish me luck.
> Thanx
> everyone,Laurie
> --- In
> anzhonda600owners@yahoogroups.com
> ,
> goinhm@... wrote:
> > Hi Laurie,
> > Below I have
> copied a msg which Bill C published on fuel pumps. It
> > kinda looks
> like the same pump which Lyle mentions in his msg. Not sure if > > these > will fit in the compartment on your coupe.
> > For the coupe, the
> fuel pump and fuel filter are in the same
> > compartment under the rear
> seat (driver's side). Have you looked at the fuel
> > filter to see if it
> is looking like it contains particles. If your new fuel
> > pump does
> will not fit in the same compartment, you can relocate it under > > the > hood. You would need to remove the existing pump and splice the two
> fuel lines together. Home Depot sells barbed brass splice connectors and
> > stainless steel clamps in the plumbing department which will > work.
> > For starters, I would remove the rear seats and
> existing fuel pump.
> > I would then attach a new fuel pump (and if it
> doesn't fit into the
> > compartment, that is ok. Let it lay on the bench
> where the seat is attahced).
> > You might need to buy some fuel hose,
> splices, and clamps to do this. Then
> > run the car and see if the
> problem is resolved. If it is, then you can
> > figure out where to
> locate the fuel pump.
> > Here is the msg from Bill;
> > Or you can go here and use an after market inline pump to > push your fuel > > to the carb. And for as little as $18.00. If your pump > is not working you > > can leave it in place and run the fuel hose to the > filter in the same place > > and hook up your new fuel pump in rear by > the tank where all the new pumps > > are. And no one will know the > difference.
> http://www.discountfuelsystems.com/shop ... XXX&PN=&Nr
> =AND(category:Fuel+Delivery,universal:0)
> > &Ntt=fuel+pump
> > The big difference is that these are new pumps not something > sitting on > > the shelf for the past 30 years.
> Bill
> > Good luck,
> > Dale
> > Hi Laurie, any electric pump that
> is low pressure 2-4 PSI will work.
> > This would be a good
> choice:
> http://shop.advanceautoparts.com/webapp ... _electric-
> fuel-pump-airtex_5773407-p
> > Carter also makes one.
> > Lyle
> > --- In
> _anzhonda600owners@yahoogroups.com
> _
> > (mailto:
> anzhonda600owners@yahoogroups.com
> )
> , "laurie_randall@" wrote:
> Hi all!
> > > My beautiful,restored '72 z600 baby car came home on a > flat bed last > > Fri.Noticed a "howling" noise from behind me. Uh,oh.I > think the fuel pump is > > unhappy. Tried to proceed.Didn't get far.Came > home not like we left.Did get > > it started again this past weekend > after checking fuel level,venting > > etc.turned on the car and pump made > it's normal click,click and floop,floop > > sounds. Started her up and > she ran for awhile (5 min or so) then the howling > > started again and > engine slowly quit and died.Stepping on the accelerator did
> nothing.Soooo,i believe it is the pump.Does anyone know where i might find a
> > Working fuel pump used,New,or alternative??
> Thanx,Laurie