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  #1  
Old 10-05-2010, 06:17 AM
mac777daddy mac777daddy is offline
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Question 1999 V-6 3.0 Issue????

Hello I have a 1999 3.0 that has some sort of issue that only happens when engine first started. I have 140k on my Ranger and this issue just started. What happens is when I first start the engine in the morning the engine starts normal but idles as if it is running out of gas. The engine will idle but feels like the truck is missing as if it is running out of gas. Once I pull out of my driveway and the engine runs and I drive for 5 mins or less the issue goes away. Then on some occasions when I take off after sitting at a traffic light I can feel hesitation when I press on the gas but it then goes away. Has anyone else had this issue? Check Engine light is off. Is there anything I can check or replace? The plugs/wires were replaced somewhere around 60k. I have added fuel injection cleaner to the tank but that did not help. This just started about a month ago. Any advice would be appreciated. I have completed all service on this truck in the past myself and really have not had any issues. This truck was purchased new by me in 1999 and has been a great truck so far. Thanks MAC
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  #2  
Old 10-05-2010, 06:36 AM
Clinton Clinton is offline
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Default Re: 1999 V-6 3.0 Issue????

Try doing these how to's
http://www.fordrangerforum.com/engin...ttle-body.html
http://www.fordrangerforum.com/how-s...r-control.html
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  #3  
Old 10-05-2010, 01:38 PM
mac777daddy mac777daddy is offline
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Default Re: 1999 V-6 3.0 Issue????

Those links are for 4.0 engine. Do you know how to do this on 3.0? Thanks MAC
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  #4  
Old 10-08-2010, 04:52 PM
wvwirenut wvwirenut is offline
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Default Re: 1999 V-6 3.0 Issue????

MAC,
It may be time for a plug and wire tuneup again. It sounds like it was a while back since it was done last. It wouldn't hurt to give it a try.
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'99 4WD Stepside 3.0L Flex
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  #5  
Old 10-09-2010, 06:08 AM
mac777daddy mac777daddy is offline
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Default Re: 1999 V-6 3.0 Issue????

Actually the check engine light came on the other morning while the truck was idling rough. So I figured I would take the truck by AutoZone for them to pull the error code. Before I went to AutoZone I lifted the hood and checked all the sensors and the wiring. I reseated a few of the sensors and the check engine light went out. So at this point I will monitor the issue. I have a feeling a sensor is about to fail or was possibly just loose. Thanks for the tips....
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  #6  
Old 10-09-2010, 06:16 AM
Fordzilla80 Fordzilla80 is offline
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Default Re: 1999 V-6 3.0 Issue????

Leave it to a sensor to make the vehicle run rough. I always hate that.

Good luck with it man!
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  #7  
Old 10-21-2010, 11:36 AM
Solo V8 4G Solo V8 4G is offline
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Default Re: 1999 V-6 3.0 Issue????

The IAC concern happens with every vehicle that has on. I would check it by hitting it with a hammer, if idle changes then that prolly your issue. Another part you may want to check would be hoses that run to your DPFE, could be clogged with carbon (just like the IAC). Also what could be happening is that the cam sensor could be cutting out... Hard to pin point that though, unless it happen when it is idling in park or neutral.
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  #8  
Old 10-26-2010, 09:28 PM
rangerak rangerak is offline
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Default Re: 1999 V-6 3.0 Issue????

Your fuel filter could be the culprit.
R
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  #9  
Old 11-26-2010, 09:13 PM
Lonncarr Lonncarr is offline
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Default Re: 1999 V-6 3.0 Issue????

I'm thinkin all the above...
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  #10  
Old 11-27-2010, 01:40 PM
mac777daddy mac777daddy is offline
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Default Re: 1999 V-6 3.0 Issue????

Check Engine Light finally came on again so I took the truck to Autozone so they could tell me which code. Looks like cylinder #5 is coding out. My plan is to replace all plugs and wires since I have not done this since 60-80k and now have 144k. Any advice on which plugs and wires to get? My truck is all stock except K&N filter so probably just need a standard set of wires and plugs. Thanks
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  #11  
Old 11-27-2010, 08:59 PM
ShadeTreeMech ShadeTreeMech is offline
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Default Re: 1999 V-6 3.0 Issue????

My nephew's wife's 2003 Ranger was setting the code indicating the number 1 cylinder was misfiring. We'd also gotten the more generic code for a cylinder misfire on startup (within first 1000 RPMs). We thought it could be the lead so yesterday morning we swapped the number 1 and number 2 cylinder leads (at both the plug and coil pack ends, of course) to see if the problem would now set the code for the number 2 cylinder instead, indicating a bad lead. While attempting to swap the leads, we noticed the spark plug end of the number 1 lead was easier to remove than any other leads - all others were very hard to remove from the plugs, but number 1 was easy to pull loose. We flattened the connecter a little with a pair of needle-nose pliers to make it grip better and then installed it in the new position (as mentioned above). I cleared the codes with my AutoXRay EZScan 6000. We drove the vehicle quite a bit more this weekend and no codes returned. Could be that simple.
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  #12  
Old 11-27-2010, 09:16 PM
ShadeTreeMech ShadeTreeMech is offline
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Default Re: 1999 V-6 3.0 Issue????

mac777daddy,
Watch out for this issue. When we were initially trying to work through the issues with the spark plug misfire, we consulted a Haynes manual for the spark plug lead wiring diagram (i.e., which connector on the coil pack connects to which cylinder's plug), just so we'd have the diagram if we replaced all of the leads. Almost immediately, we noticed that the orientation of the plug leads did not match the picture in the Haynes manual. We wondered if this could be the cause of the misfire problem (that some cylinders were sparking at the wrong time)? Before moving any of the leads, we checked on the web and found other pictures indicating the Haynes manual was correct about the wiring. So we moved the wires and guess what...the engine wouldn't start. After that we noticed a sticker on the coil pack that was covered in grime. We cleaned the sticker and could read that the wiring was correct initially according to the sticker. We put them back and the truck started right up! Lesson learned...if the coil pack has a sticker (and you may have to wipe off some grime to find it), follow its directions!
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  #13  
Old 11-28-2010, 08:12 AM
mac777daddy mac777daddy is offline
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Default Re: 1999 V-6 3.0 Issue????

Thanks for the info. When I did a wire/plug swap sometime ago I removed one wire and one plug at a time. That way I was sure to get everything back correctly. I was told cylinder 5 is the middle cylinder on the drivers side? I was going to pull that plug today to look at it and reseat the wire. I think I still should replace all the plugs and wires. From doing a search on this forum it looks like the majority prefer to replace the wires and plugs with Motocraft. Of course my dealer parts dept does not open until Monday.
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  #14  
Old 11-28-2010, 01:36 PM
ShadeTreeMech ShadeTreeMech is offline
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Default Re: 1999 V-6 3.0 Issue????

Yep. Cylinder 5 is the middle, driver's side cylinder. Passenger side front to back are 1, 2 and 3, respectively. Driver's side front to back are 4, 5 and 6 respectively. Good luck. By the way, I replaced the spark plug leads on an '89 Acura Legend I owned a few years back with wires I got at AutoZone...they offered three grades, I think and I went for the cheapest. They burned through within a week and I had to replace them. Lesson learned: don't get the cheapies!
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  #15  
Old 11-28-2010, 03:04 PM
rangerak rangerak is offline
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Default Re: 1999 V-6 3.0 Issue????

If Motorcraft Platinums are unavailable or too expensive for you, I've had excellent service life from Autolite Double Platinums.
R
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