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Author Topic: Issues with 19# injector swap  (Read 9880 times)

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YJ KiD

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Re: Issues with 19# injector swap
« Reply #30 on: October 17, 2009, 03:16:12 PM »
i guess what i was trying to get at was that there are no more mods or changes that need to be made for the swap to compensate for the extra fuel being delivered.  Sorry didn't explai it very well.

didn't end up doing it today, cant control the weather
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Offline Jeffy

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Re: Issues with 19# injector swap
« Reply #31 on: October 17, 2009, 03:24:48 PM »
Quote from: YJ KiD on October 17, 2009, 03:16:12 PM
i guess what i was trying to get at was that there are no more mods or changes that need to be made for the swap to compensate for the extra fuel being delivered.  Sorry didn't explai it very well.

didn't end up doing it today, cant control the weather
Is that going to be your only mod?
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Offline FourbangerYJ

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Re: Issues with 19# injector swap
« Reply #32 on: October 17, 2009, 04:05:46 PM »
Well, I took it out for a drive. It started out running good. Pulled a hill that normally bogged the motor. Seemed like it had good power. Then it had a shudder at about 3K RPM's. It got worse. Then it would not go above 2500 RPM, it sounded like junk! Then is seemed to clear up ran good for about 2 seconds and started to run like crap.
Looks like I am going to pull those injectors and install the other set I have.  :baby: Good thing it's a pretty easy job.
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Offline FourbangerYJ

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Re: Issues with 19# injector swap
« Reply #33 on: October 17, 2009, 04:26:48 PM »
Thinking about it for a bit. The trouble started after the CEL came on. I wonder if those 2 broken clips are for some reason not making a good enough contact and are not firing the injector? They seem tight.
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Offline Jeffy

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Re: Issues with 19# injector swap
« Reply #34 on: October 17, 2009, 05:42:47 PM »
Quote from: FourbangerYJ on October 17, 2009, 04:26:48 PM
Thinking about it for a bit. The trouble started after the CEL came on. I wonder if those 2 broken clips are for some reason not making a good enough contact and are not firing the injector? They seem tight.
What codes?  25?
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Offline sharpxmen

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Re: Issues with 19# injector swap
« Reply #35 on: October 17, 2009, 06:49:28 PM »
Quote from: FourbangerYJ on October 17, 2009, 04:26:48 PM
Thinking about it for a bit. The trouble started after the CEL came on. I wonder if those 2 broken clips are for some reason not making a good enough contact and are not firing the injector? They seem tight.

take the rail out and have 4  jars under the injectors (or 2 bigger ones since the 1-2 and 3-4 cyl are close enough). unplug your ignition coil and have someone crank the engine while you watch the spray coming out of the injectors - could be that one or 2 of them is/are squirting rather than misting fuel and the symptom is somewhat similar to when they are unplugged. I would also check the plugs and see if any of them are wet or really black. 
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Offline FourbangerYJ

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Re: Issues with 19# injector swap
« Reply #36 on: October 17, 2009, 08:10:53 PM »
Well, I swapped in the other set. Runs the same as with the first set.
I have not checked the code. I am guessing it's the F.I. connector.
I thought about pulling the spark plug to see what's going on.
Good idea on the pulling the rail and coil wire.
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YJake

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Re: Issues with 19# injector swap
« Reply #37 on: October 17, 2009, 08:18:07 PM »
Just got my refurbed Gen-2 19lbs. Injectors in the mail yesterday.

Not sure that I wan't to put them in yet since I'll be going on a trip in less than two weeks.

I have the 4.0TB and have removed the airbox restrictors. I hope that is enough for the injectors to be used to their full extent.
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Offline FourbangerYJ

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Re: Issues with 19# injector swap
« Reply #38 on: October 17, 2009, 08:27:00 PM »
Quote from: Jeffy on October 17, 2009, 05:42:47 PM
What codes?  25?

12 and 27. I know what 27 is, it's the FI control. What's 12?
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Offline aw12345

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Re: Issues with 19# injector swap
« Reply #39 on: October 17, 2009, 09:01:50 PM »
Scott, I have a little pulser box so you can pulse the injectors individually and see what the pressure drop for each one is. Is about the best way to test the injectors.
Some auto parts stores carry the tool also. It's the easiest way to see how much fuel each injector flows. In general broken clips on a injector wire connector does not generally cause a misfire
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Offline dwtaylorpdx

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Re: Issues with 19# injector swap
« Reply #40 on: October 17, 2009, 10:11:13 PM »
12 = Lean condition + MAP low vacume signal if I recall from my hell trip a couple weeks ago...

Dave
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Offline Jeffy

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Re: Issues with 19# injector swap
« Reply #41 on: October 18, 2009, 12:33:37 AM »
Quote from: FourbangerYJ on October 17, 2009, 08:10:53 PM
Well, I swapped in the other set. Runs the same as with the first set.
I have not checked the code. I am guessing it's the F.I. connector.
I thought about pulling the spark plug to see what's going on.
Good idea on the pulling the rail and coil wire.
http://4bangerjp.com/forums/index.php/topic,3419.0.html

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Offline dwtaylorpdx

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Re: Issues with 19# injector swap
« Reply #42 on: October 18, 2009, 12:38:26 AM »
Ah I was thinking of 13... It wasn't in my freeking haynes manual, had to call a dealer to get it... arrg.

Dave
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Offline FourbangerYJ

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Re: Issues with 19# injector swap
« Reply #43 on: October 18, 2009, 12:34:06 PM »
I pulled all 4 spark plugs. They look good. Not gassy or black. They were a light brown/reddish color.
Gonna pull the fuel rail again, maybe the injectors are not seated all the way in?
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Offline Jeffy

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Re: Issues with 19# injector swap
« Reply #44 on: October 18, 2009, 12:36:07 PM »
Quote from: FourbangerYJ on October 18, 2009, 12:34:06 PM
I pulled all 4 spark plugs. They look good. Not gassy or black. They were a light brown/reddish color.
Gonna pull the fuel rail again, maybe the injectors are not seated all the way in?
If the rail bolted down then they are seated.
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