How to seat the Fuel Pump and Filter (Mopar MPI)
 

Hi all,

Installing the MPI kit on my 83 CJ7.

Well, after bunches of cusses and getting black with grease, I installed
the Fuel Pump and Filter but haven't mounted them yet. That is, the lines
are all connected together but I haven't tied them down yet.

Question: Should these sit right on the cross member or should they be
mounted on something like a rubber mat or something? Doesn't seem right
that they should sit right on the cross member.

Also, I had another guy tell me that these fuel pumps go out quite often.
He said they get hot and stop working and so he always carrys a spare. I'm
in SoCal. Has anyone else had this problem? Do these things go out often?

Thanks,

Bill

Re: How to seat the Fuel Pump and Filter (Mopar MPI)
 

Bill,

> Question: Should these sit right on the cross member or should they be
> mounted on something like a rubber mat or something? Doesn't seem right
> that they should sit right on the cross member.

Mine is mounted directly to the crossmember above the axle, just like the
instructions say... So far no problem.

> Also, I had another guy tell me that these fuel pumps go out quite often.
> He said they get hot and stop working and so he always carrys a spare.
I'm
> in SoCal. Has anyone else had this problem? Do these things go out
often?

I live in San Diego, Last weekend I drove to and from Big Bear via I-15,
I-215. On the way home on Monday, my thermometer on my wrist read a cool 100
degrees. At my feet it must have been at least 30degrees hotter, and at the
fuel pump at least that hot... No trouble at all. I do recommend you route
the fuel line down the passenger side around the radiator and up to prevent
vapor lock. Some guys say its not needed but I took no chances. My whole
front clip was off at the time so it was a piece of cake. Use hard line as
far as possible too. (now tomorrow I'll go out there, and the damn thing
won't start).

Rich

Re: How to seat the Fuel Pump and Filter (Mopar MPI)
 

Bill,

> Question: Should these sit right on the cross member or should they be
> mounted on something like a rubber mat or something? Doesn't seem right
> that they should sit right on the cross member.

Mine is mounted directly to the crossmember above the axle, just like the
instructions say... So far no problem.

> Also, I had another guy tell me that these fuel pumps go out quite often.
> He said they get hot and stop working and so he always carrys a spare.
I'm
> in SoCal. Has anyone else had this problem? Do these things go out
often?

I live in San Diego, Last weekend I drove to and from Big Bear via I-15,
I-215. On the way home on Monday, my thermometer on my wrist read a cool 100
degrees. At my feet it must have been at least 30degrees hotter, and at the
fuel pump at least that hot... No trouble at all. I do recommend you route
the fuel line down the passenger side around the radiator and up to prevent
vapor lock. Some guys say its not needed but I took no chances. My whole
front clip was off at the time so it was a piece of cake. Use hard line as
far as possible too. (now tomorrow I'll go out there, and the damn thing
won't start).

Rich

Re: How to seat the Fuel Pump and Filter (Mopar MPI)
 

Rich,

I left the "hard lines" as they were. On my jeep the supply comes down
the passenger side and the return goes back the drivers side. Also, the
instructions say there should be three lines coming out of a rubber block on
the cross member. Mine was nothing like that. On mine the supply line was
going across the entire cross member. I cut it at each end, flared each end
and connected it all with fuel injection rated fuel line.

Now, the guy I bought this kit from ran his supply line (the kit piece) over
the valve cover instead of running fuel injection rated line around the
radiator like the instructions say. He said it worked fine and although it
looks "unclean" I'm going to try it like this first to see how it works and
if I don't like it I'll change it.


What are the effects of vapor lock and how do you recover from it?


Thanks,

Bill


"Richard Harris" <SHARRIS11@san.rr.com> wrote in message
news:TQx6b.30597$IJ6.1456395@twister.socal.rr.com. ..
> Bill,
>
> > Question: Should these sit right on the cross member or should they be
> > mounted on something like a rubber mat or something? Doesn't seem right
> > that they should sit right on the cross member.
>
> Mine is mounted directly to the crossmember above the axle, just like the
> instructions say... So far no problem.
>
> > Also, I had another guy tell me that these fuel pumps go out quite
often.
> > He said they get hot and stop working and so he always carrys a spare.
> I'm
> > in SoCal. Has anyone else had this problem? Do these things go out
> often?
>
> I live in San Diego, Last weekend I drove to and from Big Bear via I-15,
> I-215. On the way home on Monday, my thermometer on my wrist read a cool
100
> degrees. At my feet it must have been at least 30degrees hotter, and at
the
> fuel pump at least that hot... No trouble at all. I do recommend you
route
> the fuel line down the passenger side around the radiator and up to
prevent
> vapor lock. Some guys say its not needed but I took no chances. My whole
> front clip was off at the time so it was a piece of cake. Use hard line as
> far as possible too. (now tomorrow I'll go out there, and the damn thing
> won't start).
>
> Rich
>
>

Re: How to seat the Fuel Pump and Filter (Mopar MPI)
 

Rich,

I left the "hard lines" as they were. On my jeep the supply comes down
the passenger side and the return goes back the drivers side. Also, the
instructions say there should be three lines coming out of a rubber block on
the cross member. Mine was nothing like that. On mine the supply line was
going across the entire cross member. I cut it at each end, flared each end
and connected it all with fuel injection rated fuel line.

Now, the guy I bought this kit from ran his supply line (the kit piece) over
the valve cover instead of running fuel injection rated line around the
radiator like the instructions say. He said it worked fine and although it
looks "unclean" I'm going to try it like this first to see how it works and
if I don't like it I'll change it.


What are the effects of vapor lock and how do you recover from it?


Thanks,

Bill


"Richard Harris" <SHARRIS11@san.rr.com> wrote in message
news:TQx6b.30597$IJ6.1456395@twister.socal.rr.com. ..
> Bill,
>
> > Question: Should these sit right on the cross member or should they be
> > mounted on something like a rubber mat or something? Doesn't seem right
> > that they should sit right on the cross member.
>
> Mine is mounted directly to the crossmember above the axle, just like the
> instructions say... So far no problem.
>
> > Also, I had another guy tell me that these fuel pumps go out quite
often.
> > He said they get hot and stop working and so he always carrys a spare.
> I'm
> > in SoCal. Has anyone else had this problem? Do these things go out
> often?
>
> I live in San Diego, Last weekend I drove to and from Big Bear via I-15,
> I-215. On the way home on Monday, my thermometer on my wrist read a cool
100
> degrees. At my feet it must have been at least 30degrees hotter, and at
the
> fuel pump at least that hot... No trouble at all. I do recommend you
route
> the fuel line down the passenger side around the radiator and up to
prevent
> vapor lock. Some guys say its not needed but I took no chances. My whole
> front clip was off at the time so it was a piece of cake. Use hard line as
> far as possible too. (now tomorrow I'll go out there, and the damn thing
> won't start).
>
> Rich
>
>

Re: How to seat the Fuel Pump and Filter (Mopar MPI)
 

Vapor lock is when there is enough heat near the fuel line to change the
gasoline from liquid to a gas...ie boil...
The pressure buildup will stop the flow of fuel to the engine. The only way
I know to recover from vapor lock is to let everything cool off, then
continue on your way. But if it happens once on a hot day, it'll more than
likely happen again, if you get the drift.
Rich
"William Oliveri" <wuji@bigvalley.net> wrote in message
news:bjea3l$i7gb2$1@ID-193866.news.uni-berlin.de...
> Rich,
>
> I left the "hard lines" as they were. On my jeep the supply comes down
> the passenger side and the return goes back the drivers side. Also, the
> instructions say there should be three lines coming out of a rubber block
on
> the cross member. Mine was nothing like that. On mine the supply line
was
> going across the entire cross member. I cut it at each end, flared each
end
> and connected it all with fuel injection rated fuel line.
>
> Now, the guy I bought this kit from ran his supply line (the kit piece)
over
> the valve cover instead of running fuel injection rated line around the
> radiator like the instructions say. He said it worked fine and although
it
> looks "unclean" I'm going to try it like this first to see how it works
and
> if I don't like it I'll change it.
>
>
> What are the effects of vapor lock and how do you recover from it?
>
>
> Thanks,
>
> Bill
>
>
> "Richard Harris" <SHARRIS11@san.rr.com> wrote in message
> news:TQx6b.30597$IJ6.1456395@twister.socal.rr.com. ..
> > Bill,
> >
> > > Question: Should these sit right on the cross member or should they be
> > > mounted on something like a rubber mat or something? Doesn't seem
right
> > > that they should sit right on the cross member.
> >
> > Mine is mounted directly to the crossmember above the axle, just like
the
> > instructions say... So far no problem.
> >
> > > Also, I had another guy tell me that these fuel pumps go out quite
> often.
> > > He said they get hot and stop working and so he always carrys a spare.
> > I'm
> > > in SoCal. Has anyone else had this problem? Do these things go out
> > often?
> >
> > I live in San Diego, Last weekend I drove to and from Big Bear via I-15,
> > I-215. On the way home on Monday, my thermometer on my wrist read a cool
> 100
> > degrees. At my feet it must have been at least 30degrees hotter, and at
> the
> > fuel pump at least that hot... No trouble at all. I do recommend you
> route
> > the fuel line down the passenger side around the radiator and up to
> prevent
> > vapor lock. Some guys say its not needed but I took no chances. My whole
> > front clip was off at the time so it was a piece of cake. Use hard line
as
> > far as possible too. (now tomorrow I'll go out there, and the damn thing
> > won't start).
> >
> > Rich
> >
> >
>
>

Re: How to seat the Fuel Pump and Filter (Mopar MPI)
 

Vapor lock is when there is enough heat near the fuel line to change the
gasoline from liquid to a gas...ie boil...
The pressure buildup will stop the flow of fuel to the engine. The only way
I know to recover from vapor lock is to let everything cool off, then
continue on your way. But if it happens once on a hot day, it'll more than
likely happen again, if you get the drift.
Rich
"William Oliveri" <wuji@bigvalley.net> wrote in message
news:bjea3l$i7gb2$1@ID-193866.news.uni-berlin.de...
> Rich,
>
> I left the "hard lines" as they were. On my jeep the supply comes down
> the passenger side and the return goes back the drivers side. Also, the
> instructions say there should be three lines coming out of a rubber block
on
> the cross member. Mine was nothing like that. On mine the supply line
was
> going across the entire cross member. I cut it at each end, flared each
end
> and connected it all with fuel injection rated fuel line.
>
> Now, the guy I bought this kit from ran his supply line (the kit piece)
over
> the valve cover instead of running fuel injection rated line around the
> radiator like the instructions say. He said it worked fine and although
it
> looks "unclean" I'm going to try it like this first to see how it works
and
> if I don't like it I'll change it.
>
>
> What are the effects of vapor lock and how do you recover from it?
>
>
> Thanks,
>
> Bill
>
>
> "Richard Harris" <SHARRIS11@san.rr.com> wrote in message
> news:TQx6b.30597$IJ6.1456395@twister.socal.rr.com. ..
> > Bill,
> >
> > > Question: Should these sit right on the cross member or should they be
> > > mounted on something like a rubber mat or something? Doesn't seem
right
> > > that they should sit right on the cross member.
> >
> > Mine is mounted directly to the crossmember above the axle, just like
the
> > instructions say... So far no problem.
> >
> > > Also, I had another guy tell me that these fuel pumps go out quite
> often.
> > > He said they get hot and stop working and so he always carrys a spare.
> > I'm
> > > in SoCal. Has anyone else had this problem? Do these things go out
> > often?
> >
> > I live in San Diego, Last weekend I drove to and from Big Bear via I-15,
> > I-215. On the way home on Monday, my thermometer on my wrist read a cool
> 100
> > degrees. At my feet it must have been at least 30degrees hotter, and at
> the
> > fuel pump at least that hot... No trouble at all. I do recommend you
> route
> > the fuel line down the passenger side around the radiator and up to
> prevent
> > vapor lock. Some guys say its not needed but I took no chances. My whole
> > front clip was off at the time so it was a piece of cake. Use hard line
as
> > far as possible too. (now tomorrow I'll go out there, and the damn thing
> > won't start).
> >
> > Rich
> >
> >
>
>

Re: How to seat the Fuel Pump and Filter (Mopar MPI)
 

>should [fuel pump] sit right on the cross member or should [it] be
>mounted on something like a rubber mat or something?

Mounting directly to the crossmember will probably transmit vibration/noise. A
piece of rubber mat wouldn't hurt. I used an old, worn out mouse pad cut to
size.

Mine is mounted on the inside of the right frame rail just behind the factory
tranny/transfer case skid plate. The reason I mounted it there is to keep it
below the tank rather than above it.

>I had another guy tell me that these fuel pumps go out quite often.
>He said they get hot and stop working and so he always carrys a spare.

Very good advice. I wouldn't say that they fail "quite often," but they do
fail on occasion. You should always carry a spare filter and fuel pump.

Robert Bills
KG6LMV
Orange County CA

http://www.outdoorwire.com/4x4/jeep/...p-l/billsr.htm
http://www.RobertBills.com

Re: How to seat the Fuel Pump and Filter (Mopar MPI)
 

>should [fuel pump] sit right on the cross member or should [it] be
>mounted on something like a rubber mat or something?

Mounting directly to the crossmember will probably transmit vibration/noise. A
piece of rubber mat wouldn't hurt. I used an old, worn out mouse pad cut to
size.

Mine is mounted on the inside of the right frame rail just behind the factory
tranny/transfer case skid plate. The reason I mounted it there is to keep it
below the tank rather than above it.

>I had another guy tell me that these fuel pumps go out quite often.
>He said they get hot and stop working and so he always carrys a spare.

Very good advice. I wouldn't say that they fail "quite often," but they do
fail on occasion. You should always carry a spare filter and fuel pump.

Robert Bills
KG6LMV
Orange County CA

http://www.outdoorwire.com/4x4/jeep/...p-l/billsr.htm
http://www.RobertBills.com