703 fuel injector swap - engine now running poorly
01-20-2013, 12:54 PM
#16
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Year: 1996
Model: Cherokee
Engine: 4.0
I looked up ford 700 injectors in xj's and it appears the consensus is those injectors require the fuel pressure regulator to be swapped out with a high pressure fuel regulator. where does one even get one of these? how hard is it to swap fuel pressure regulators?
I'm thinking if problems persist it may be easier to just actually get 703's as I originally intended.
I'm thinking if problems persist it may be easier to just actually get 703's as I originally intended.
01-20-2013, 12:59 PM
#17
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Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
Why not just send bad injector back and get replaced ?
Last edited by freegdr; 01-20-2013 at 01:01 PM.
01-20-2013, 01:56 PM
#19
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Year: 1998
Model: Cherokee
Engine: 4.0
thanks for the replies everyone. oddly, since I pulled the injector plugs to test resistance I haven't had any issues. it's been a few days and she's running beautifully. think I should still test the injectors as recommended above? when I removed the plugs, they certainly weren't easy to come off so I can't imagine a poorly seated plug but I guess anything is possible.
I'll have to look into the ford plug issues mentioned above. that's pretty disappointing if true. if the issues keep up maybe ill be buying another set but let's hope she keeps running smoothly.
I'll have to look into the ford plug issues mentioned above. that's pretty disappointing if true. if the issues keep up maybe ill be buying another set but let's hope she keeps running smoothly.
01-20-2013, 02:24 PM
#20
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Year: 1996
Model: Cherokee
Engine: 4.0
it's been about 6 months since i bought them. I can't imagine the guy i bought them from still honoring the warranty he included but it is worth a try.
I'll give the wiggling a try. See if it starts acting up.
In regards to Seafoam, I just bought a can. Going to put it in the tank next time I fuel up. Will it produce a ton of smoke if I use the whole can? How long does all that smoke last? I've never used Seafoam before :x
I'll give the wiggling a try. See if it starts acting up.
In regards to Seafoam, I just bought a can. Going to put it in the tank next time I fuel up. Will it produce a ton of smoke if I use the whole can? How long does all that smoke last? I've never used Seafoam before :x
01-20-2013, 04:33 PM
#21
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Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
Theve ben sitting for 6 months most likely fuel left in thems varnishing up getting fresh fuel thru them helping clean it out using a gas treatment should also help .
01-21-2013, 05:44 AM
#22
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Year: 1998
Model: Cherokee
Engine: 4.0
it's been about 6 months since i bought them. I can't imagine the guy i bought them from still honoring the warranty he included but it is worth a try.
I'll give the wiggling a try. See if it starts acting up.
In regards to Seafoam, I just bought a can. Going to put it in the tank next time I fuel up. Will it produce a ton of smoke if I use the whole can? How long does all that smoke last? I've never used Seafoam before :x
I'll give the wiggling a try. See if it starts acting up.
In regards to Seafoam, I just bought a can. Going to put it in the tank next time I fuel up. Will it produce a ton of smoke if I use the whole can? How long does all that smoke last? I've never used Seafoam before :x
http://naxja.net/forum/showthread.php?t=1045426&page=8
01-21-2013, 08:23 AM
#23
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Seafoam in the gas tank isn't what causes all the smoke. That's caused from running it through your vacuum line (the one on the brake booster is the best one to use). It's then that you get A LOT of smoke. You're supposed to keep it revved until the smoke clears so there should be very little if any when you first go driving after using it.
As for the injectors, if she's running smooth now, let her be. A little Seafoam isn't going to hurt it. Sounds like the one was just a little clogged up honestly and causing an intermittent spray.
As for the injectors, if she's running smooth now, let her be. A little Seafoam isn't going to hurt it. Sounds like the one was just a little clogged up honestly and causing an intermittent spray.
01-21-2013, 10:33 AM
#24
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Year: 1997
Model: Cherokee
Engine: 4.0
Crap, if thats the case then I'll probably have issues with mine when I finally install them. They've been sitting in the box they shipped in since I got them 10 months ago..heck i dont even know if I have all six LOL. Though when shipped I was told they were cleaned and flow tested, so I suppose its possible there isn't any left over fuel to varnish.
01-21-2013, 01:26 PM
#25
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Year: 1992
Model: Cherokee
Engine: 4.0 HO
Crap, if thats the case then I'll probably have issues with mine when I finally install them. They've been sitting in the box they shipped in since I got them 10 months ago..heck i dont even know if I have all six LOL. Though when shipped I was told they were cleaned and flow tested, so I suppose its possible there isn't any left over fuel to varnish.
01-31-2014, 07:12 PM
#26
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Year: 2000
Model: Cherokee
Engine: 4.0
Is refurbished the way to go?
If so, is there a particular refurb center that is reputable? Recommendations?
I have a 2000 XJ. I'm going for 784's as I was already planning on changing all connectors. May as well go EV6.
Also, I've changed several sensors and made various other repairs. Will resetting the ECU make a difference with those swaps, being as many of the sensors communicate with the ECU, dictating things like fuel/air mixture and idle?
If so, is there a particular refurb center that is reputable? Recommendations?
I have a 2000 XJ. I'm going for 784's as I was already planning on changing all connectors. May as well go EV6.
Also, I've changed several sensors and made various other repairs. Will resetting the ECU make a difference with those swaps, being as many of the sensors communicate with the ECU, dictating things like fuel/air mixture and idle?
01-31-2014, 09:10 PM
#27
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Year: 1996
Model: Cherokee
Engine: 4.0
Is refurbished the way to go?
If so, is there a particular refurb center that is reputable? Recommendations?
I have a 2000 XJ. I'm going for 784's as I was already planning on changing all connectors. May as well go EV6.
Also, I've changed several sensors and made various other repairs. Will resetting the ECU make a difference with those swaps, being as many of the sensors communicate with the ECU, dictating things like fuel/air mixture and idle?
If so, is there a particular refurb center that is reputable? Recommendations?
I have a 2000 XJ. I'm going for 784's as I was already planning on changing all connectors. May as well go EV6.
Also, I've changed several sensors and made various other repairs. Will resetting the ECU make a difference with those swaps, being as many of the sensors communicate with the ECU, dictating things like fuel/air mixture and idle?
01-31-2014, 09:18 PM
#28
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Year: 2000
Model: Cherokee
Engine: 4.0
Is refurbished the way to go?
If so, is there a particular refurb center that is reputable? Recommendations?
I have a 2000 XJ. I'm going for 784's as I was already planning on changing all connectors. May as well go EV6.
Also, I've changed several sensors and made various other repairs. Will resetting the ECU make a difference with those swaps, being as many of the sensors communicate with the ECU, dictating things like fuel/air mixture and idle?
If so, is there a particular refurb center that is reputable? Recommendations?
I have a 2000 XJ. I'm going for 784's as I was already planning on changing all connectors. May as well go EV6.
Also, I've changed several sensors and made various other repairs. Will resetting the ECU make a difference with those swaps, being as many of the sensors communicate with the ECU, dictating things like fuel/air mixture and idle?
01-31-2014, 11:58 PM
#29
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Year: 1988
Model: Cherokee
Engine: 4.0 Liter Inline Six
I just did the 703 swap. The engine will run rough like that for the next 50 warm up cycles. The computer needs to learn the trim levels of the new injectors. Fuel pressure regulator is super easy to change out.