4.2 and split port swap

Bartikus

Bartikus

Active Member
fasterthanyou said:
Yeah man, I think the ecm only corrects for up to 8% variation in air/fuel ratios before it throws a lean or rich code. I believe it is capable of correcting up to 28% variation but obviously will still throw a code.

If you put the stock single port injectors back in, it should eliminate the codes.
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Right, except I changed out the plugs to the 99-04 style. So I'll need to get a set of 14# injectors from the junkyard.
 
8

89FoxSC4.3

Member
fasterthanyou said:
Yeah man, I think the ecm only corrects for up to 8% variation in air/fuel ratios before it throws a lean or rich code. I believe it is capable of correcting up to 28% variation but obviously will still throw a code.

If you put the stock single port injectors back in, it should eliminate the codes.
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I couldn’t remember exactly how much but thats close to what I was thinking percentage wise.
 
8

89FoxSC4.3

Member
Bartikus said:
Right, except I changed out the plugs to the 99-04 style. So I'll need to get a set of 14# injectors from the junkyard.
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I know you probably don’t want to wait if you have access to some near by but I have a extra set that I took out of my 95 mustang when I did my Super Coupe Swap that has been sealed in a ziplock back every since.
 
Bartikus

Bartikus

Active Member
89FoxSC4.3 said:
I know you probably don’t want to wait if you have access to some near by but I have a extra set that I took out of my 95 mustang when I did my Super Coupe Swap that has been sealed in a ziplock back every since.
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Thanks, yeah I'll let you know. I'm going to hit the junkyard in the morning to see what I can find.
 
8

89FoxSC4.3

Member
I just read again and seen that you also changed to the in injector plugs to the 99-04 these are the 95 style 14lb injectors. Another thing are you not worried about it going lean with the 14’s in there? Or are you just putting them in there to drive at the lower rpms of daily driving til you get your tune?
 
Bartikus

Bartikus

Active Member
89FoxSC4.3 said:
I just read again and seen that you also changed to the in injector plugs to the 99-04 these are the 95 style 14lb injectors. Another thing are you not worried about it going lean with the 14’s in there? Or are you just putting them in there to drive at the lower rpms of daily driving til you get your tune?
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I need to pass emissions and then I don't care if the code is being thrown until I can get a tuner.
 
8

89FoxSC4.3

Member
Oh ok gotcha I remember you talking about the emissions. Well you can let me know if you need the 14’s that I have you are welcome to them. I will just have to dig them up.
 
Bartikus

Bartikus

Active Member
I checked the factory injectors that came off of my single port and from what I can tell they are 17# injectors. They are a cream color. So I wonder if the 19# inje tors I have will work. I'm going to install them tonight and see if it fixes my check engine light issue.
 
Bartikus

Bartikus

Active Member
https://www.injectorrx.com/fuel-inj...ctors/fuel-injector-data/ford-fuel-injectors/

I found this website and was able to identify that injectors from an early 2000s Taurus 3.0 were were only 17# injectors. I pulled them at the junkyard today. So far so good no check engine light as of yet. I'll keep you guys posted. Ok for reference the purple ones we from a 2004 freestar with a 4.2, the yellow ones are 2003 for f150 with a 4.2, the red ones are 2003 Ford Taurus with a 3.0.IMG_20180825_170939683_HDR.jpg IMG_20180825_170954685_HDR.jpg IMG_20180825_171025050.jpg IMG_20180825_171033315.jpg
 
Bartikus

Bartikus

Active Member
I was out driving the car around tonight and didn't have the check engine light come on at all. So I decided to check and see if it had any precodes. Everything is good, no precodes at all. It currently has 7 readies and 0 not readies. So it will pass emissions when I go to take it in.
 
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