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You bet! And a big THANK YOU to you as well for your 00M12 thread which I read about 50 times before starting my project ;-) It was a huge help...much appreciated! Unfortunately, the only thermo housing I could find in my area was at a local NAPA, and has the original thread design. I had...

Update: http://www.explorerforum.com/forums/showpost.php?p=3267228&postcount=25

An update: This weekend I installed the 00M12 kit, and it pretty much solved all my problems. The o-rings between the upper & lower intakes were hard as nails and brittle. The idle is now smooth as silk, and no more pulsing. The old chain tensioner that came out was actually a little...

Thanks Markaprice!

I realize this is in the wrong forum for me, but I have a 1998 Explorer Eddie Bauer. Rock Auto points me to the VS50491R part which look more like the traditional, "thicker" gaskets: http://www.rockauto.com/catalog/moreinfo.php?pk=446823&cc=1304413 The VS50529 gaskets look thinner...

No CEL I've both cleaned and put a new IAC in, but have not cleaned the MAF or throttle body. When the 00M12 kit goes in, I'll be putting a new PCV in as well. Thanks for the tips!

It did idle with the IAC unplugged, just lower and smoother. When I first replaced it, it seemed to idle better for a few days, then it went back to it's surging tricks. I did not pull the battery cable. I didn't realize I needed to do that after an IAC change? Another option is the...

I just put a brand new IAC in, and the surging idle persists. Probably a vacuum leak issue. Once I replace the intake gaskets with the 00M12 kit, we'll see where that gets me. Thanks for the input everyone! I'll disconnect the belt as StreetRod suggests to eliminate all belt-driven...

I've crawled under the rig while running and placed my ear as close to the cats/exhaust as possible, as well as tried to locate the sound in the engine bay. I do not have a mechanics stethoscope, so I cannot pinpoint the origin, but the sound is the loudest underneath near the back/bottom of...

Thanks again koda! I have the M0012 kit sitting in my garage waiting to be installed ;-) I'll probably replace the other tensioners too, since the M0012 kit only comes with one. The intake gaskets are part of that kit, so that's a good thing. I'm also having some idling/vacuum problems, so...

thanks koda2000! The problem is that I just bought this rig for $3,500. It's a 98 but it only has 87k original miles, and it's been babied. It's in mint condition, and I have all the service records and receipts. The oil was changed religiously every 3k miles, as well as the tranny fluid...

So after driving my Ex more over the last month, I've got an update. I've determined exactly when it rattles, and under what circumstances. Very strange...I can't wrap my head around it. Perhaps the following details would give someone a clue as to what this would point to? I hear the loud...

Thanks so much! Looks like I have some work to do. Man, and here I thought I was buying a reliable low mileage vehicle from my dad...

Thanks so much for the help. I will do as you suggest! My rig is 4wd. One thing that's throwing me off about this rattle is that it's quite infrequent, and only when warm. Seems to be the opposite of when most of these motors rattle due to timing chain issues. I have not listened to the...

I was hoping you'd chime in 2000! I've been doing a lot of research on this site and you seem like one of the resident experts on these matters. Yes, my idle speed is definitely uneven. See my thread about it here. I do suspect the manifold gaskets and/or other vacuum issues (I also have RPM...

Hello everyone. Here's a video (sorry for the bad quality) of my engine running. 98 EB w/ only 86k miles. Is the noise (particularly at the beginning) my timing chain(s) rattling? It's loud, but only occasionally. Oddly, it only does this when warm. I originally suspected the catalytic...

Yes, I think maybe a key point is that the idle is super smooth when in gear (foot on brake) or when AC/defrost is on. As soon as the motor is unloaded, it surges. Loaded, no surge. It's funny listening to it with the defrost on...it clicks on, smooths out, clicks off, starts pulsing. I...

Getting back to my original post with the linked YT video, how likely is it that it's a vacuum leak (i.e. intake manifold gaskets)? I would almost think that old/bad intake gaskets would produce more random idling troubles. This is very consistent, only under no load, and only when warm...

This is an option I've been thinking of as well. I've read mikeh's excellent write up here and 2000StreetRod's here about installing the 00M12 kit. Should I go with the kit over just buying some Fel-Pro gaskets separately? I would guess it would be great to change out the chain tensioner...

I will take it in to O'Reilly's and get the codes checked and go from there. Thanks guys!

Good idea. I'm not sure. I just found the thread about testing the TPS, I'll have to get a voltmeter and test it out. Could a bad IAC do this? I had a Crown Vic with the 5.0, and it did the exact same surge at warm idle. Cleaning the IAC cleared it up on the Vic. I tried cleaning my...

Hello everyone. I recently bought my father's 98 EB with the SOHC, and was really happy with it until I started doing all the research on the timing chain issues. It's only got 86k miles, and is in super shape, but I'm not sure if it has timing chain rattle or not. It definitely has some...

Well, here I am again. I wound up selling the '93 XLT after only about 2 months of ownership, and I just bought a '98 EB. My third Explorer. I just can't live without 'em! My first vehicle with the SOHC 4.0

Roger that. Thanks guys!

So is driving around without having the TC locked a big deal? I'm about to embark on a trip pulling a small trailer. I'd be around 3k RPMs at highway speeds for about 200 miles one-way. Also, after thinking about this more, I shouldn't have said I'm getting into 4th gear. All I really know...