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Old 04-16-2011, 11:59 AM
Rodknock Rodknock is offline
Learning to use the forums
Join Date: Apr 2011
Posts: 4
Default Rough Idle,

My 2004 with a 4.0 started acting up when i started it up, rough idle with black smoke coming out and could not get any power when i was trying to go up a small hill,press on the gas and the motor lost power. Let it idle and when i pushed on the gas the rpms would go to 3000 and back down slowly and almost die the go up to around 750-1000 rpms. Any help would be nice.

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Old 04-16-2011, 10:32 PM
Gunner Gunner is offline
Diesel Truck & Coach Tech
Join Date: Dec 2010
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Default Re: Rough Idle,

Sounds like you're running pig rich. Check your MAF and see if it needs to be cleaned, that might be it but I'm just taking a guess based on what you said.
2011 Ford Ranger Sport 4x4
5 Speed Manual
MBRP stainless catback
"Air Box Mod" with K&N drop in
GlowShift Oil pressure & Volts in A pillar pod
T-bar crank to level
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