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  #1  
Old 05-31-2004, 11:33 AM
Risky Risky is offline
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1986 ford Ranger over fuel problem

Ok here it is I hope some one can help its 1986 Ranger with a 2.9L V6 Auto 4x4, well to start with it seriously over fueling also it idles very roughly and even stalls out sometimes, when Iím trying to hold it at a speed it acts like it is missing (I guess thatís from over fueling as well and it also pukes out lots of black smoke, it goes through way too much gas for a V6), but when I speed up fairly hard it acts fine until I try to maintain speed again, I have already put a tune up into it and a new EGR as well a fuel regulator has anyone ever had this problem and do they know how to fix it????? thanks

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Old 05-31-2004, 12:18 PM
87 XLT 87 XLT is offline
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Take a couple minutes to pull the codes. A code 22 (bad MAP sensor)would be a very simple fix. Buy a code scanner for 20 bucks or check out the tech info sticky for pulling EEC-4 codes.
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Old 06-01-2004, 07:24 AM
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Very good advice 87XLT, Risky don't just throw parts at this problem, as there are a number of things that will mess with the fuel mixture, as mentioned the MAP, or MAF or a temp sensor, ect, ect.

Taking the time to pull the codes can save a lot of time, money & guess work & likely point you to the troubled system or part.

So pull those codes & let us know what you find.
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Old 06-01-2004, 09:19 AM
braineless braineless is offline
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I have the same truck same problem...
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Old 06-01-2004, 05:30 PM
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Risky & Brainless, my local AotoZone & Advance Auto both use the Actron CP9150 scanner kit. It uses the CP9145 scanner & the needed cable to hook up to your dignostic connector.

This scanner can monitor live feeds from sensors into the computer, as well as read stored codes.

They don't charge anything here to scan your computer.

Just another option for you to consider in getting your codes pulled.
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Old 06-01-2004, 05:43 PM
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Thanks folkes i will get back to you all when i find out
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Old 06-01-2004, 11:55 PM
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I have the same truck. And I had the same problem. However it was my fuel pressure reg. It was dumping almost seventy pounds into that 2.9 talk about rich! anyway a new reg. fixed it . good luck!
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Old 06-02-2004, 07:41 AM
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The regulator can stick, and cause fuel to dump in there. Buy the gauge for about $35, and check the pressure. You'll hate Ford when you have to pay for the new regulator, as it is over $100. ANd the fuel line retainer clips are almost impossible to remove.
But, your fuel mileage wil almost double...
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Old 06-07-2004, 02:33 PM
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Anyone know the proceedure for testing the fuel pressure regulator on a 2.9L? Do I need to buy a special fuel pressure gage or will any work?
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Old 06-07-2004, 02:49 PM
87 XLT 87 XLT is offline
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Quote:
Originally Posted by durken
Anyone know the proceedure for testing the fuel pressure regulator on a 2.9L? Do I need to buy a special fuel pressure gage or will any work?
It's on page 4-4 in your Haynes manual
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Old 06-07-2004, 03:02 PM
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Check out the link I have in the tech info thread, I would expect any FP gauge you would by today would be fine.
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Old 08-24-2004, 02:55 AM
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hey could it be the o2 senser????
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Old 08-24-2004, 06:31 PM
ol yeller ol yeller is offline
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maybe

who knows son's truck doing the same 89 2.9. we unhooked the o2 and it improved somewhat.
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Old 08-25-2004, 12:26 AM
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Hey All
I just replied to 1800GL on this forum with a suggestion on his fuel problem. I've seen a problem with the fuel press regulator failing open, causing severe flooding at throttle-up. Idle was fine and there were no fault codes. It was a friends Ranger and he spent much time, effort and money on parts. In the end it was the regulator. He had the 2.8 but my 2.9 has been fine so far, but I won't forget.
Good luck
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Old 08-25-2004, 08:20 PM
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A clogged return line can cause high pressure too.
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Old 08-25-2004, 08:20 PM
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