hey guys i picked up my ranger a couple months ago and ever since i have owned it, i been having some issues. It idles pretty rough and surges at idle pretty bad, also the truck seems to idle around 1050 = 1100 even after the truck is warm, to me that just seems way to high. The things that i have replaced are the IAC,TPS,EGR valve,EGR tube,cleaned the MAF sensor, and changed the air filter. the truck was tuned up right before i bought it . it is throwing zero codes, any help would be appreciated . thanks

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97 ranger 4x4 4.0l auto. ion 171 wheels, mastercraft tires. smoked headlights and tail lights

I would try a reman Mass Air Flow Sensor. They can be bad and not have the MIL come on. Cleaning will not repair a bad MAF.

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2001 ranger short cab short box 2.3 liter 5 spd manual

would a bad MAF effect mileage and the high idle?

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97 ranger 4x4 4.0l auto. ion 171 wheels, mastercraft tires. smoked headlights and tail lights

bump

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97 ranger 4x4 4.0l auto. ion 171 wheels, mastercraft tires. smoked headlights and tail lights

check all your vacuum lines for cracks/holes.
Is your idle surging with the climate controls OFF? Mine surges pretty bad too but only when my heater/AC are on.

read this thread 01 4.0 idles rough. (vid attached)

[quote=JGiddy;733472]check all your vacuum lines for cracks/holes.
Is your idle surging with the climate controls OFF? Mine surges pretty bad too but only when my heater/AC are on.[/QUO

It will surge all the time regardless if the climate control is off or on. i have checked the vacuum lines. the only thing i havent check is the manifold gasket, i heard some times that is a problem. i will go back and double check everything though.

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that sounds just like my problem and i have replaced and cleaned everything i can. the only thing that i didnt replace was the MAF sensor. i just cleaned it, maybe it has just gone bad? my mpg are really suffering though, i used to get 14.5 a tank and now its between 10-12

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97 ranger 4x4 4.0l auto. ion 171 wheels, mastercraft tires. smoked headlights and tail lights

clean it first, drive a tank of gas and see what MPGs are then. if worst then 16. you may wanna look into getting another one.

Your IAC valve might need adjusting,cleaning or replacing. That's one of the problems that I encountered over the years on every ranger that I've owned in the past.

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SOLD: 2004 Ford Ranger Edge 3.0 V6 5 speed



www.knightmare1015.blogspot.com

well i have already cleaned it and it seems like after i did that my mileage took a chit! because it has been 10-12 ever since. i also replaced the air filter at the same time.

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i just replaced it like 3 weeks ago. i didnt see anyway to adjust it, is there some procedure i have to do when replacing it? I just put on the gasket and rolled lol could it be bad from the store?

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97 ranger 4x4 4.0l auto. ion 171 wheels, mastercraft tires. smoked headlights and tail lights

well i cleaned the MAF sensor again and it seems to have lowered my idle down to around 800-900 once its warm which that makes me happy. its running a little rough down the road but im sure that will clear up after i run it for a little while. i will let you guys know the results

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97 ranger 4x4 4.0l auto. ion 171 wheels, mastercraft tires. smoked headlights and tail lights