Question about 1994 Ford Ranger Supercab

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My 1994 Ford Ranger (2.3L, 2WD, Auto-trans) runs rough. I've put new plug wires, spark plugs and even changes out the dual ignition coils and the engine runs rough at idle and seems to be lacking power. Could it be the lifters? If so, I have new lifters and rockers to replace them. Bit only if I need too.

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  • wtdash Aug 06, 2010

    Is the Check Engine Light on? If so, you'll need to get the codes read by a mechanic or search online on how to do it. I would doubt the lifters are the cause, unless you have very high mileage.



    Also, pull & clean the IAC, as it's often the culprit of idle problems.

    If cleaning it solves the problem, it may not last for long, but at least you'll know what to replace if the problem returns.

    With the vintage of this ride, I'd also have a close look at ALL vacuum lines & their connections & this would include the PCV valve & it's hoses & the vapor recovery system.



    It could also be the EGR/DPFE system...Google DPFE and you'll get more info.



    GL,

    Td

  • kevinhcrow Aug 07, 2010

    Yes, the check engine light comes on after about 1-2 minutes after starting. Pulled off the IAC. Quite dirty. I'll stop off to buy some electrical component cleaner. Is there any way to check the solenoid/motor to verify if it is working properly? If so, what voltage?

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I suggest to get the codes checked so you're not chasing a moving target. You'll need to look online - check out the Ranger/Explorer forums - or get the Factory Service Manual (FSM) to get the technical info you're requesting.

GL,
Td

Posted on Aug 07, 2010

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Did you replace the air filter if not you should if it dirty it will be choking your engine thus causing the truck to idel rough



Posted on Aug 06, 2010

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SOURCE: ignition wiring

firingorder6a.gif firingorder6.gif 1991-1994 2.9L and 3.0L Engines Firing Order 1-4-2-5-3-6 1995 And Later 3.0L V-6 With DIS Ignition System Firing Order 1-4-2-5-3-6
4.0L Engines Firing Order: 1-4-2-5-3-6 DIS Ignition System

Posted on Nov 23, 2008

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SOURCE: I have a 98 Ford Ranger, 3.0L. I replaced the EGR

i would change your idle air controle its 60$ and a great start

Posted on Apr 25, 2010

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I Have a 1999 ford f150 4.6 that back fires and is just running really ruff when idling alot of nack fire a sord of like a pulse going on what is my problem?

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firingorder6a.gif firingorder6.gif 1991-1994 2.9L and 3.0L Engines Firing Order 1-4-2-5-3-6 1995 And Later 3.0L V-6 With DIS Ignition System Firing Order 1-4-2-5-3-6
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