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  #1  
Old 02-09-2011, 12:01 AM
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Default 2004+ explorer alt problems?

hey everyone just wondering if anyone has a high output alt in a 04+ Explorer with the 4.0 V6 engine? i have the mechman 3g 270amp alt and i talked to mechman today about getting an external regulator and he said that the inline regulator that they sell will not work on my alt. something to do with the regulator from the car that will lower the votage when at idle. he also said that i could ship the alt back to him and he could hard wire the voltage regulator to the alt, but he has never done it with my model of explorers. he said that the check engine light could come up and that he wouldnt know if anything else would go wrong so he thought that i should ask around on the forums to see if anyone has any experience with this problem?

thanx
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Old 02-09-2011, 08:33 AM
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I have a mechman 270a in my 04 Explorer v6.

Has an adjustable voltage harness on it that he made a plug for, with a Lil set screw.

Also have 14v batts now and run alt at 16.4.

When I first got alt in the batt light came on and still on, but everything is fine.

But our idle is set sooooo low that at idle no matter what voltage drops bout 1 oe 2 volts, but u tap the gas and it goes right back up.

Its annoying , I was thinking of getting a programmer too turn idle too bout 1k so it doesn't dip
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Old 02-09-2011, 10:14 AM
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yah i seen your video with the 16v. so you just have the new product that mechman has out where you literally plug it into the alt and then the car harness and the screw is on the side of the wire? he told me it was $99 right?
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Old 02-09-2011, 11:58 AM
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Quote:
Originally Posted by Skip01 View Post
I have a mechman 270a in my 04 Explorer v6.

Has an adjustable voltage harness on it that he made a plug for, with a Lil set screw.

Also have 14v batts now and run alt at 16.4.

When I first got alt in the batt light came on and still on, but everything is fine.

But our idle is set sooooo low that at idle no matter what voltage drops bout 1 oe 2 volts, but u tap the gas and it goes right back up.

Its annoying , I was thinking of getting a programmer too turn idle too bout 1k so it doesn't dip

What is your idle RPM? How big is the pulley?
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Old 02-09-2011, 12:05 PM
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those explorers are just a tad over 500rpm at idle
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Old 02-09-2011, 12:55 PM
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i got a smaller pulley but its been so cold out i havent put it in yet.
when my ex is warm with lights and stereo off it sits at 13.7-13.9v
when headlights are on it will sit at 13.5v
when headlights and foglights are on it sits at 13v
but if i tap the gas it will jump up to 14.4 and same on the highway
its not the alt becuase my voltage is great when im driving its only at idle.
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Old 02-09-2011, 12:55 PM
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hey skip01 what alt do you have? 3g or 4g
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Old 02-09-2011, 01:03 PM
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With a 500rpm idle even with the smallest pulley you would only be around 2k alt rpm. That sucks! I thought 650 was bad in my jeep
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Old 02-09-2011, 01:05 PM
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i think its around 550-600. its bad and thats how my other explorer was and the pulley helped but had to be on the gas to demo
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Old 02-09-2011, 01:05 PM
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i idle at 500 with my subaru and charge at 15.2 with my dc power FTW
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