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Old 12-02-2008, 03:30 PM   #1
SawyerRanger
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Default Replacing Spark Plugs

Does anyone have a guide on how to replace/check spark plugs in a 4.0 OHV(1999 model)
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Old 12-02-2008, 03:33 PM   #2
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Pull old plugs out, put new ones in. Do them one at a time to keep the firing order right. Also a lot of people find that jacking the front end up and letting the front tires flex out to full droop makes it a lot easier to access some of the plugs from the wheel wells.
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Old 12-02-2008, 03:58 PM   #3
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So they are accessed from the wheel wells?
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Old 12-02-2008, 04:04 PM   #4
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on your OHV they can be accessed from the top. The drivers side has plenty of room, but the passengers side is pretty tight. Mainly on the first cyl. That is the one that is next to the front of the truck on the pass side. Thats a PITA. Helps if you have small hands also.
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Old 12-02-2008, 09:50 PM   #5
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wratcheting wrench works good for that back passenger cyl.
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Old 12-04-2008, 02:09 PM   #6
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Default Jack up

If you are a larger person, putting the truck on jack stands, removing the front wheels, and pulling the inner fiber fender sheilds next to the engine compartment makes this a lot easier. You can also inspect areas of the engine for leaks, etc. while you are at it.
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Old 12-04-2008, 02:11 PM   #7
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Quote:
Originally Posted by 97ranger4x4 View Post
on your OHV they can be accessed from the top. The drivers side has plenty of room, but the passengers side is pretty tight. Mainly on the first cyl. That is the one that is next to the front of the truck on the pass side. Thats a PITA. Helps if you have small hands also.
Ya that one definitely is a fight. I try to save it for last. After that plug you need a break and it helps if that last one finishes the job.
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Old 12-04-2008, 02:22 PM   #8
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I took a look at the locations of the plugs, and yeah, that right side definitely does not look fun, lol. I may take Woody's idea if I ever get around to it.

Instead of posting a new thread I'll just ask this here I guess. Basically the truck has been shaking very roughly when I first start it (cold start), however after it warms up it the shaking goes away.

Something similar to the shaking happened during the summer, and the result was 6 blown spark plugs, which Firestone fixed among other things like wiring for a *gracious* sum So I figured if it was plugs, I would just do it myself before it gets any worse and save some money and do it now before it got any worse. But due to it getting all new plugs, wiring etc in August, and the shaking going away after the engine warms up to normal operating temp, I figured it could be something else.

So I started reading about the MAF sensor and cleaning it, and then I went to Autozone and asked where the MAF cleaner was, and then I told him this and he said asked if there was a check engine light, and I told him that there was no check engine light. So he said maybe it could be a seal somewhere, and I should check my vacuum lines before I really buy anything. So I figured that would be a good idea.

So, summing all this up, what do you guys think? My guesses are bad plugs, vacuum lines, dirty MAF, maybe a gasket seal? And there still is no check engine light. So if anyone has any ideas that would be great.

EDIT: Just read somewhere that some companies oxygenate their gas during winter. I live in New England, so it can get pretty cold, and this all started after I filled up my truck half way with Irving Gas.. And it did seem like I was getting worse fuel mileage..

There are so many possibilities!
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Old 12-04-2008, 07:15 PM   #9
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Quote:
Originally Posted by 97ranger4x4 View Post
on your OHV they can be accessed from the top. The drivers side has plenty of room, but the passengers side is pretty tight. Mainly on the first cyl. That is the one that is next to the front of the truck on the pass side. Thats a PITA. Helps if you have small hands also.
That must be why I didn't have to many problems with it. I just made sure I had multiple lengths of extensions a a u-joint adapter (or what-ever that thing is called) and had minimal difficulties. It was nothing compared to when I had to change the plugs on my 90 4 banger.
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Old 12-05-2008, 09:59 AM   #10
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Default

yeh the best tool I think I ever bought was my wobble extension set from harbor freight. for $8 those tools have paid for themselves many times over.

It has made changing spark plugs much easier than with just my basic sockets.

I think changing the plugs on my buddies Honda civic was without a doubt the easiest job I have ever seen. I think I could acctually change all 4 plugs faster than I could fuel up my truck.
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