Replacement fuel injectors
10-27-2005, 12:45 PM
#11
Guest
Posts: n/a
Re: Replacement fuel injectors
I have them in my 91 YJ...
Put them in myself they seem to be working just fine!
Brian Moga
Waxhaw.Net
On Thu, 27 Oct 2005, Gene Saldivar wrote:
> Date: Thu, 27 Oct 2005 06:29:49 GMT
> From: Gene Saldivar <saldivar@ix.netcom.com>
> Newsgroups: rec.autos.makers.jeep+******
> Subject: 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?
>
>
>
10-27-2005, 12:45 PM
#12
Guest
Posts: n/a
Re: Replacement fuel injectors
I have them in my 91 YJ...
Put them in myself they seem to be working just fine!
Brian Moga
Waxhaw.Net
On Thu, 27 Oct 2005, Gene Saldivar wrote:
> Date: Thu, 27 Oct 2005 06:29:49 GMT
> From: Gene Saldivar <saldivar@ix.netcom.com>
> Newsgroups: rec.autos.makers.jeep+******
> Subject: 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?
>
>
>
10-27-2005, 12:45 PM
#13
Guest
Posts: n/a
Re: Replacement fuel injectors
I have them in my 91 YJ...
Put them in myself they seem to be working just fine!
Brian Moga
Waxhaw.Net
On Thu, 27 Oct 2005, Gene Saldivar wrote:
> Date: Thu, 27 Oct 2005 06:29:49 GMT
> From: Gene Saldivar <saldivar@ix.netcom.com>
> Newsgroups: rec.autos.makers.jeep+******
> Subject: 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?
>
>
>
10-27-2005, 10:51 PM
#14
Guest
Posts: n/a
Re: Replacement fuel injectors
I had already replaced three during the years. All for leaking. At least
two of the remaining originals are leaking and more than likely it is all
three that are leaking. At $70 each, replacing the three would be about
$210+. Of the three that I replaced, one was not like the OEMs. Parts guy
said it would work so I used it...it did. If I could get all 6 for less
than the cost of three OEM then why not.
"Jerry Bransford" <jerrypb@***.net> wrote in message
news:PI_7f.14096$MN6.9422@fed1read04...
> 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.***.net/jerrypb/
two of the remaining originals are leaking and more than likely it is all
three that are leaking. At $70 each, replacing the three would be about
$210+. Of the three that I replaced, one was not like the OEMs. Parts guy
said it would work so I used it...it did. If I could get all 6 for less
than the cost of three OEM then why not.
"Jerry Bransford" <jerrypb@***.net> wrote in message
news:PI_7f.14096$MN6.9422@fed1read04...
> 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.***.net/jerrypb/
10-27-2005, 10:51 PM
#15
Guest
Posts: n/a
Re: Replacement fuel injectors
I had already replaced three during the years. All for leaking. At least
two of the remaining originals are leaking and more than likely it is all
three that are leaking. At $70 each, replacing the three would be about
$210+. Of the three that I replaced, one was not like the OEMs. Parts guy
said it would work so I used it...it did. If I could get all 6 for less
than the cost of three OEM then why not.
"Jerry Bransford" <jerrypb@***.net> wrote in message
news:PI_7f.14096$MN6.9422@fed1read04...
> 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.***.net/jerrypb/
two of the remaining originals are leaking and more than likely it is all
three that are leaking. At $70 each, replacing the three would be about
$210+. Of the three that I replaced, one was not like the OEMs. Parts guy
said it would work so I used it...it did. If I could get all 6 for less
than the cost of three OEM then why not.
"Jerry Bransford" <jerrypb@***.net> wrote in message
news:PI_7f.14096$MN6.9422@fed1read04...
> 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.***.net/jerrypb/
10-27-2005, 10:51 PM
#16
Guest
Posts: n/a
Re: Replacement fuel injectors
I had already replaced three during the years. All for leaking. At least
two of the remaining originals are leaking and more than likely it is all
three that are leaking. At $70 each, replacing the three would be about
$210+. Of the three that I replaced, one was not like the OEMs. Parts guy
said it would work so I used it...it did. If I could get all 6 for less
than the cost of three OEM then why not.
"Jerry Bransford" <jerrypb@***.net> wrote in message
news:PI_7f.14096$MN6.9422@fed1read04...
> 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.***.net/jerrypb/
two of the remaining originals are leaking and more than likely it is all
three that are leaking. At $70 each, replacing the three would be about
$210+. Of the three that I replaced, one was not like the OEMs. Parts guy
said it would work so I used it...it did. If I could get all 6 for less
than the cost of three OEM then why not.
"Jerry Bransford" <jerrypb@***.net> wrote in message
news:PI_7f.14096$MN6.9422@fed1read04...
> 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.***.net/jerrypb/
10-28-2005, 01:21 AM
#17
Guest
Posts: n/a
Re: Replacement fuel injectors
What are you using for gas, all major fuels have additive to keep
injectors, even the inside of the engine clean of deposits.
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/
Gene Saldivar wrote:
>
> I had already replaced three during the years. All for leaking. At least
> two of the remaining originals are leaking and more than likely it is all
> three that are leaking. At $70 each, replacing the three would be about
> $210+. Of the three that I replaced, one was not like the OEMs. Parts guy
> said it would work so I used it...it did. If I could get all 6 for less
> than the cost of three OEM then why not.
injectors, even the inside of the engine clean of deposits.
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/
Gene Saldivar wrote:
>
> I had already replaced three during the years. All for leaking. At least
> two of the remaining originals are leaking and more than likely it is all
> three that are leaking. At $70 each, replacing the three would be about
> $210+. Of the three that I replaced, one was not like the OEMs. Parts guy
> said it would work so I used it...it did. If I could get all 6 for less
> than the cost of three OEM then why not.
10-28-2005, 01:21 AM
#18
Guest
Posts: n/a
Re: Replacement fuel injectors
What are you using for gas, all major fuels have additive to keep
injectors, even the inside of the engine clean of deposits.
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/
Gene Saldivar wrote:
>
> I had already replaced three during the years. All for leaking. At least
> two of the remaining originals are leaking and more than likely it is all
> three that are leaking. At $70 each, replacing the three would be about
> $210+. Of the three that I replaced, one was not like the OEMs. Parts guy
> said it would work so I used it...it did. If I could get all 6 for less
> than the cost of three OEM then why not.
injectors, even the inside of the engine clean of deposits.
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/
Gene Saldivar wrote:
>
> I had already replaced three during the years. All for leaking. At least
> two of the remaining originals are leaking and more than likely it is all
> three that are leaking. At $70 each, replacing the three would be about
> $210+. Of the three that I replaced, one was not like the OEMs. Parts guy
> said it would work so I used it...it did. If I could get all 6 for less
> than the cost of three OEM then why not.
10-28-2005, 01:21 AM
#19
Guest
Posts: n/a
Re: Replacement fuel injectors
What are you using for gas, all major fuels have additive to keep
injectors, even the inside of the engine clean of deposits.
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/
Gene Saldivar wrote:
>
> I had already replaced three during the years. All for leaking. At least
> two of the remaining originals are leaking and more than likely it is all
> three that are leaking. At $70 each, replacing the three would be about
> $210+. Of the three that I replaced, one was not like the OEMs. Parts guy
> said it would work so I used it...it did. If I could get all 6 for less
> than the cost of three OEM then why not.
injectors, even the inside of the engine clean of deposits.
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/
Gene Saldivar wrote:
>
> I had already replaced three during the years. All for leaking. At least
> two of the remaining originals are leaking and more than likely it is all
> three that are leaking. At $70 each, replacing the three would be about
> $210+. Of the three that I replaced, one was not like the OEMs. Parts guy
> said it would work so I used it...it did. If I could get all 6 for less
> than the cost of three OEM then why not.
10-28-2005, 02:12 PM
#20
Guest
Posts: n/a
Re: Replacement fuel injectors
There is a formula to calculate the correct injector size for your engine.
It is not an exact science. You have a range that you can use, but there are
drawbacks to going too big or too small. To calculate the minimum required
injector size, all you really need is the peak horsepower of the engine.
From there, it is a simple calculation. An engine requires 1/2 pound of fuel
per horsepower per hour, so from there you can use this simple formula:
Injector size(LBS./HR) = (Engine HP/(2*No. of cylinders*.85)
Using the specs from the Jeep website, a current 4.0 I-6 makes 190HP. So,
plugging that into the formula you would have:
Injector size = 190/(2*6*.85) or 18.63
The .85 is there to account for an 85% duty cycle on the injectors. This is
the maximum recommended duty cycle.
Considering that the engine power ratings these days are net, and they take
into consideration the drivetrain losses, your engine actually makes more
power than the net rating. In that case the 19LB injector is marginal. I
personally wouldn't run them and would stick to the 21LB or even look for
the next size up, which I believe is 24LB. Going to a larger injector won't
hurt anything, unless it is way too big, but going up a size or two won't
cause any problems.
Chris
"Gene Saldivar" <saldivar@ix.netcom.com> wrote in message
news:xt_7f.2118$Rl1.1528@newsread1.news.pas.earthl ink.net...
> 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?
>
>
It is not an exact science. You have a range that you can use, but there are
drawbacks to going too big or too small. To calculate the minimum required
injector size, all you really need is the peak horsepower of the engine.
From there, it is a simple calculation. An engine requires 1/2 pound of fuel
per horsepower per hour, so from there you can use this simple formula:
Injector size(LBS./HR) = (Engine HP/(2*No. of cylinders*.85)
Using the specs from the Jeep website, a current 4.0 I-6 makes 190HP. So,
plugging that into the formula you would have:
Injector size = 190/(2*6*.85) or 18.63
The .85 is there to account for an 85% duty cycle on the injectors. This is
the maximum recommended duty cycle.
Considering that the engine power ratings these days are net, and they take
into consideration the drivetrain losses, your engine actually makes more
power than the net rating. In that case the 19LB injector is marginal. I
personally wouldn't run them and would stick to the 21LB or even look for
the next size up, which I believe is 24LB. Going to a larger injector won't
hurt anything, unless it is way too big, but going up a size or two won't
cause any problems.
Chris
"Gene Saldivar" <saldivar@ix.netcom.com> wrote in message
news:xt_7f.2118$Rl1.1528@newsread1.news.pas.earthl ink.net...
> 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?
>
>