Replacement fuel injectors
 

I am looking at replacing all 6 of the fuel injectors on my 93 Grand
Cherokee.

So I do all my research and now I am more confused that when I started.
According to what I could find, years 91-93 used part number 33007127,
however all the injectors I have pulled are part number 53030343, which were
used in years 94-95. They are both supposedly 21lb/hr, so I assume that it
really doesn't matter.

Expensive as the OEM parts are I looked for less expensive alternatives. I
keep finding mention of others buying Bosch/Ford 19lb injectors at a huge
discount. Sites like ebay and Five-o Motersports also list them as
replacements for the OEM parts. Does anyone have any experience with these
type of injectors and should I be concerned with using the 19lb as opposed
to the 21lb?

Re: Replacement fuel injectors
 

Why do you feel the need to replace them all?

Gene Saldivar wrote:
> I am looking at replacing all 6 of the fuel injectors on my 93 Grand
> Cherokee.
>
> So I do all my research and now I am more confused that when I started.
> According to what I could find, years 91-93 used part number 33007127,
> however all the injectors I have pulled are part number 53030343, which were
> used in years 94-95. They are both supposedly 21lb/hr, so I assume that it
> really doesn't matter.
>
> Expensive as the OEM parts are I looked for less expensive alternatives. I
> keep finding mention of others buying Bosch/Ford 19lb injectors at a huge
> discount. Sites like ebay and Five-o Motersports also list them as
> replacements for the OEM parts. Does anyone have any experience with these
> type of injectors and should I be concerned with using the 19lb as opposed
> to the 21lb?
>
>

--
Jerry Bransford
PP-ASEL N6TAY
See the Geezer Jeep at
http://members.cox.net/jerrypb/

Re: Replacement fuel injectors
 

Why do you feel the need to replace them all?

Gene Saldivar wrote:
> I am looking at replacing all 6 of the fuel injectors on my 93 Grand
> Cherokee.
>
> So I do all my research and now I am more confused that when I started.
> According to what I could find, years 91-93 used part number 33007127,
> however all the injectors I have pulled are part number 53030343, which were
> used in years 94-95. They are both supposedly 21lb/hr, so I assume that it
> really doesn't matter.
>
> Expensive as the OEM parts are I looked for less expensive alternatives. I
> keep finding mention of others buying Bosch/Ford 19lb injectors at a huge
> discount. Sites like ebay and Five-o Motersports also list them as
> replacements for the OEM parts. Does anyone have any experience with these
> type of injectors and should I be concerned with using the 19lb as opposed
> to the 21lb?
>
>

--
Jerry Bransford
PP-ASEL N6TAY
See the Geezer Jeep at
http://members.cox.net/jerrypb/

Re: Replacement fuel injectors
 

Why do you feel the need to replace them all?

Gene Saldivar wrote:
> I am looking at replacing all 6 of the fuel injectors on my 93 Grand
> Cherokee.
>
> So I do all my research and now I am more confused that when I started.
> According to what I could find, years 91-93 used part number 33007127,
> however all the injectors I have pulled are part number 53030343, which were
> used in years 94-95. They are both supposedly 21lb/hr, so I assume that it
> really doesn't matter.
>
> Expensive as the OEM parts are I looked for less expensive alternatives. I
> keep finding mention of others buying Bosch/Ford 19lb injectors at a huge
> discount. Sites like ebay and Five-o Motersports also list them as
> replacements for the OEM parts. Does anyone have any experience with these
> type of injectors and should I be concerned with using the 19lb as opposed
> to the 21lb?
>
>

--
Jerry Bransford
PP-ASEL N6TAY
See the Geezer Jeep at
http://members.cox.net/jerrypb/

Re: Replacement fuel injectors
 

What Jerry said, although a gasoline density of roughly 6 lb/gal, times
6 cyl, theoretically gives you 19 gallons an hour for the whole engine,
with 19 lb/hr injectors. Just doing the math, that is way more than
you will ever need. It comes to 3 miles per gallon at about 65 mi/hr.

It is not uncommon, when doing a part number/model year switch, for a
manufacturer to make the change early or late, depending on the stock
of old parts that they have to get rid of.

What you should be concerned with, is how do these injectors work in
the Jeep engine, according to published reports, and do you believe
them? If what you hope to achieve, is worth the price, then go for it.

Earle

Re: Replacement fuel injectors
 

What Jerry said, although a gasoline density of roughly 6 lb/gal, times
6 cyl, theoretically gives you 19 gallons an hour for the whole engine,
with 19 lb/hr injectors. Just doing the math, that is way more than
you will ever need. It comes to 3 miles per gallon at about 65 mi/hr.

It is not uncommon, when doing a part number/model year switch, for a
manufacturer to make the change early or late, depending on the stock
of old parts that they have to get rid of.

What you should be concerned with, is how do these injectors work in
the Jeep engine, according to published reports, and do you believe
them? If what you hope to achieve, is worth the price, then go for it.

Earle

Re: Replacement fuel injectors
 

What Jerry said, although a gasoline density of roughly 6 lb/gal, times
6 cyl, theoretically gives you 19 gallons an hour for the whole engine,
with 19 lb/hr injectors. Just doing the math, that is way more than
you will ever need. It comes to 3 miles per gallon at about 65 mi/hr.

It is not uncommon, when doing a part number/model year switch, for a
manufacturer to make the change early or late, depending on the stock
of old parts that they have to get rid of.

What you should be concerned with, is how do these injectors work in
the Jeep engine, according to published reports, and do you believe
them? If what you hope to achieve, is worth the price, then go for it.

Earle

Re: Replacement fuel injectors
 

Gene Saldivar did pass the time by typing:
> I am looking at replacing all 6 of the fuel injectors on my 93 Grand
> Cherokee.

Why? Is one of your sparkplugs showing lean (slow injector) or carbon
(sticky injector). Or are they out of spec 14.5 ohms +- 1.2 homs at
20C(68F)

If you do, replace the O-rings at the same time. A bit of vasoline
or motor oil will help them slide in.

I did a writeup a while back. It's in the google archives for ramjw.
http://groups.google.com/group/rec.a...a0239ebb417c8d

> So I do all my research and now I am more confused that when I started.
> According to what I could find, years 91-93 used part number 33007127,
> however all the injectors I have pulled are part number 53030343, which were
> used in years 94-95. They are both supposedly 21lb/hr, so I assume that it
> really doesn't matter.
>
> Expensive as the OEM parts are I looked for less expensive alternatives. I
> keep finding mention of others buying Bosch/Ford 19lb injectors at a huge
> discount. Sites like ebay and Five-o Motersports also list them as
> replacements for the OEM parts. Does anyone have any experience with these
> type of injectors and should I be concerned with using the 19lb as opposed
> to the 21lb?

Before you replace, phone around for local diesel and injector repair shops.
They usually have the equipment to flow-check and clean your injectors. It
will take about a day but cost less than one new injector. And you will
know if any of them are out of spec.


4.0 I6:

87-90 #53003956 18.6lb/hr @ 39psi
91-93 #33007127 21.0lb/hr @ 39psi
94-95 #53030343 21.0lb/hr @ 39psi
96-98 #53030778 23.2lb/hr @ 49psi
99-01 #04854181 22.5lb/hr @ 49psi


--
-- DougW -- 93 ZJ 4.0 http://members.cox.net/wilsond
HESCO Supercharger - 300W IASCA Stereo - Edelbrock IAS Shocks
Gibson Exhaust - rear DCpower - custom gauge install - Stillen Rotors
Banks Header - and BEER, in the fridge!

Re: Replacement fuel injectors
 

Gene Saldivar did pass the time by typing:
> I am looking at replacing all 6 of the fuel injectors on my 93 Grand
> Cherokee.

Why? Is one of your sparkplugs showing lean (slow injector) or carbon
(sticky injector). Or are they out of spec 14.5 ohms +- 1.2 homs at
20C(68F)

If you do, replace the O-rings at the same time. A bit of vasoline
or motor oil will help them slide in.

I did a writeup a while back. It's in the google archives for ramjw.
http://groups.google.com/group/rec.a...a0239ebb417c8d

> So I do all my research and now I am more confused that when I started.
> According to what I could find, years 91-93 used part number 33007127,
> however all the injectors I have pulled are part number 53030343, which were
> used in years 94-95. They are both supposedly 21lb/hr, so I assume that it
> really doesn't matter.
>
> Expensive as the OEM parts are I looked for less expensive alternatives. I
> keep finding mention of others buying Bosch/Ford 19lb injectors at a huge
> discount. Sites like ebay and Five-o Motersports also list them as
> replacements for the OEM parts. Does anyone have any experience with these
> type of injectors and should I be concerned with using the 19lb as opposed
> to the 21lb?

Before you replace, phone around for local diesel and injector repair shops.
They usually have the equipment to flow-check and clean your injectors. It
will take about a day but cost less than one new injector. And you will
know if any of them are out of spec.


4.0 I6:

87-90 #53003956 18.6lb/hr @ 39psi
91-93 #33007127 21.0lb/hr @ 39psi
94-95 #53030343 21.0lb/hr @ 39psi
96-98 #53030778 23.2lb/hr @ 49psi
99-01 #04854181 22.5lb/hr @ 49psi


--
-- DougW -- 93 ZJ 4.0 http://members.cox.net/wilsond
HESCO Supercharger - 300W IASCA Stereo - Edelbrock IAS Shocks
Gibson Exhaust - rear DCpower - custom gauge install - Stillen Rotors
Banks Header - and BEER, in the fridge!

Re: Replacement fuel injectors
 

Gene Saldivar did pass the time by typing:
> I am looking at replacing all 6 of the fuel injectors on my 93 Grand
> Cherokee.

Why? Is one of your sparkplugs showing lean (slow injector) or carbon
(sticky injector). Or are they out of spec 14.5 ohms +- 1.2 homs at
20C(68F)

If you do, replace the O-rings at the same time. A bit of vasoline
or motor oil will help them slide in.

I did a writeup a while back. It's in the google archives for ramjw.
http://groups.google.com/group/rec.a...a0239ebb417c8d

> So I do all my research and now I am more confused that when I started.
> According to what I could find, years 91-93 used part number 33007127,
> however all the injectors I have pulled are part number 53030343, which were
> used in years 94-95. They are both supposedly 21lb/hr, so I assume that it
> really doesn't matter.
>
> Expensive as the OEM parts are I looked for less expensive alternatives. I
> keep finding mention of others buying Bosch/Ford 19lb injectors at a huge
> discount. Sites like ebay and Five-o Motersports also list them as
> replacements for the OEM parts. Does anyone have any experience with these
> type of injectors and should I be concerned with using the 19lb as opposed
> to the 21lb?

Before you replace, phone around for local diesel and injector repair shops.
They usually have the equipment to flow-check and clean your injectors. It
will take about a day but cost less than one new injector. And you will
know if any of them are out of spec.


4.0 I6:

87-90 #53003956 18.6lb/hr @ 39psi
91-93 #33007127 21.0lb/hr @ 39psi
94-95 #53030343 21.0lb/hr @ 39psi
96-98 #53030778 23.2lb/hr @ 49psi
99-01 #04854181 22.5lb/hr @ 49psi


--
-- DougW -- 93 ZJ 4.0 http://members.cox.net/wilsond
HESCO Supercharger - 300W IASCA Stereo - Edelbrock IAS Shocks
Gibson Exhaust - rear DCpower - custom gauge install - Stillen Rotors
Banks Header - and BEER, in the fridge!