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1998 Ford Explorer 2wd 5.0 8 cyl
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Rboats
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Jul 19, 2011, 10:48 AM
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1998 Ford Explorer 2wd 5.0 8 cyl
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My 1998 ford explorer has recently started jumping and kind of sputtering at around 30-45 mph. When i give it the gas and speed up it usually stops, it has backfired a couple of times and also stalled in traffic while sitting still with foot on brake. I try to do most work on my own vehicles and have gotten a lot help from this site in the past. I'm thinking either fuel filter or clogged injectors. Fuel filter was replaced by jiffy-lube numskulls with aftermarket filter a few years ago and said they cannot get it off now. It is also geting bad gas mileage, a lot more than usual. Vehicle has just turned over 200,000 miles. It has always run great with tons of power. My health is not as good as used to be so a little difficult for me to get to tight spots, but I can do it. Can anyone please give me their first and other opinions on cause and sequence of what to check first. Can't afford to take to repair shop. Like I said, I am pretty mechanically inclined and do almost all work on my cars within my scope.
Any help and advice would be greeatly appreciated. Thanks in advance, Randy
Randy
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Hammer Time
Ultimate Carjunky
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Jul 19, 2011, 4:07 PM
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Re: 1998 Ford Explorer 2wd 5.0 8 cyl
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Please stop creating duplicate questions. It will not get faster answers and will only serve to confuse. I have deleted your others.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Discretesignals
Ultimate Carjunky
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Jul 19, 2011, 4:27 PM
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Re: 1998 Ford Explorer 2wd 5.0 8 cyl
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Where did it backfire out of?
What is the fuel pressure?
Fuel pressure should be 27-42 psi engine running. 30-45 Key on engine off. Fuel pressure should hold when the pump stops running. Pump should be able to move 19 lbs/hour.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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zmame
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Jul 19, 2011, 6:57 PM
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Re: 1998 Ford Explorer 2wd 5.0 8 cyl
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Would check the timing too.. might have skipped a tooth with that high of milage.
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Rboats
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Jul 20, 2011, 6:50 AM
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Re: 1998 Ford Explorer 2wd 5.0 8 cyl
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Where and how do I check pressure paramters. Remember, i am Novice but pretty bright with lamen terms. Am going to get my manual back today I hope..loaned to a "good friend", we all know how that goes, can' t find him know. Found fuel filter location, seems easy enough..but how do I relieve any pressure before removing/replacing. Thanks in advance for any help, Randy
Randy
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Rboats
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Jul 20, 2011, 10:35 AM
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Re: 1998 Ford Explorer 2wd 5.0 8 cyl
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Sorry there Hammertime, just haven't been here in quite sometime, bare with me. Tanks
Randy
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zmame
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Jul 20, 2011, 3:44 PM
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Re: 1998 Ford Explorer 2wd 5.0 8 cyl
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there is a shrader valve on the fuel rail that will be your test port. You can pull the fuel pump relay and run it till it stalls out or push the sharder valve to releave fuel pressure. Little more messy.. gas will come out so be carefull.
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Discretesignals
Ultimate Carjunky
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Jul 20, 2011, 3:53 PM
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Re: 1998 Ford Explorer 2wd 5.0 8 cyl
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Hey, that's a 3.8L. 
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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zmame
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Jul 20, 2011, 4:11 PM
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Re: 1998 Ford Explorer 2wd 5.0 8 cyl
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more for a clear picture of what a shrader valve look like
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Rboats
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Jul 24, 2011, 10:08 AM
Post #10 of 15
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Re: 1998 Ford Explorer 2wd 5.0 8 cyl
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Thanks, but where is the shrader valve. And what is the best way to clean the fuel injectors? I know thereis a way to hook up a strong burning cleaner directly to the fuel rack to really clean the gunk out of the injectors. Remember seeing it done once. But I am not paying $100 for something I can do for a few bucks. Any advice is greatly appreciated guys..Thanks in advance
Randy
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Sidom
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Jul 24, 2011, 10:46 AM
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Re: 1998 Ford Explorer 2wd 5.0 8 cyl
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You know I'll try not to confuse things since there is already a lot of good advise here.
I would probably clean the MAF sensor with a can of MAF cleaner. If that helped the problem, I would replace the MAF.
It's quick & easy, just gotta make sure you clean the sensing wire & not the temp sensor......
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Discretesignals
Ultimate Carjunky
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Jul 24, 2011, 12:29 PM
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Re: 1998 Ford Explorer 2wd 5.0 8 cyl
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How did you determine that you have dirty injectors? Heck, you haven't even determined what the fuel pressure is or what your compression numbers are. Maybe you should take that $100 and have a local mechanic tell you what is wrong with it.
The old carbed (without feedback) cars didn't require all the sophisticated and expensive tools you need for diagnosing drive-ability issue on EFI vehicles. The time and money you spend on playing swaptronics and injector guessing games will easily exceed the cost of having a pro diagnose it.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
(This post was edited by Discretesignals on Jul 24, 2011, 12:36 PM)
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zmame
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Jul 24, 2011, 1:23 PM
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Re: 1998 Ford Explorer 2wd 5.0 8 cyl
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You won't be able to inject anything right into the fuel rail without a proper machine like teraclean.. Get your fuel pressure readings and check if that's ok first.
(This post was edited by zmame on Jul 24, 2011, 1:25 PM)
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Rboats
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Sep 14, 2011, 12:17 PM
Post #15 of 15
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Re: 1998 Ford Explorer 2wd 5.0 8 cyl
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Just to follow up. I know it's been a while but I use this board and know that I look for problems resolved from help on the board.
Problem was a faulty camshaft sensor which the onboard system pointed towrd in the error codes to begin with. Fairly easy fix, actually real easy just hard to get to.
Lesson learned = always trouble shoot by atleast connecting a handheld diagnostic and listen to what your car is saying.
another few hundred $$ saved, Thanks, All
Randy
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