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Old 08-25-2012, 12:54 AM   #1
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4.0 Throttle body just made me had issues/ speedo gear needed, unrelated

Installed the 4.0 Throttle body for like 2 months and it seemed to have a little more power.... But then I noticed at the higher rpms it was losing a little power and start up was rough and way too high.

Q: I assume this is because it is running a bit lean so maybe injectors would be the way to go with the 4.0 throttle body. Anyway, my 2.5 needs power with the new 33s so any tips for torque upgrades would help.

Also, I need a speedo gear for my NP231 with the 33's and I am not sure how many teeth? Someone told me that 33 inch tires are not the exactly 33 so I am not sure if this is accurate. I look at the guide and I believe it is a 33 tooth.

Any help would be kick ass...

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Old 08-25-2012, 09:06 AM   #2
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Go with the 19lb fuel injectors. They are plug and play. Nothing else needed. They come out of ford explorers. They have four holes pushing fuel instead of one.

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Old 08-25-2012, 12:39 PM   #3
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plug n' play? same connector? I am looking into doing this myself. Also heard some mustangs might have them.. Wonder if there is a part numb. with a model guide? Also doing the electric fan conv. soon. Taurus's I hear.
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Old 08-25-2012, 04:46 PM   #4
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Originally Posted by YJ325i
plug n' play? same connector? I am looking into doing this myself. Also heard some mustangs might have them.. Wonder if there is a part numb. with a model guide? Also doing the electric fan conv. soon. Taurus's I hear.
Yea. They come in some mustangs. They are orange. Real easy to identify. Plug and play- nothing else needed, the plug right in, same connector. As for the fan yes, a Taurus will work. Plenty of writeups on the fans.
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Old 08-25-2012, 05:34 PM   #5
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Originally Posted by Springsblueyj View Post
Yea. They come in some mustangs. They are orange. Real easy to identify. Plug and play- nothing else needed, the plug right in, same connector. As for the fan yes, a Taurus will work. Plenty of writeups on the fans.
Awesome, ty for the info, will head to the yard next weekend, hopefully.
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Old 08-25-2012, 06:02 PM   #6
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Awesome, ty for the info, will head to the yard next weekend, hopefully.
Yep. also clean your throttle body, and see if that helps your rpm. If not one of the components might be going bad (tps) or (iac).
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Old 08-26-2012, 12:24 AM   #7
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Awesome guys, I will do the injectors for sure

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