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 on: February 13, 2018, 07:57:16 PM 
Started by darkswitch155 - Last post by darkswitch155
I have a 2005 aztek and my dome lights stopped coming on when i open my
Door. Theyw work with all other doors, is there some switch that went bad? My dome light switch is on. Can anyone help?
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 on: February 12, 2018, 04:59:12 PM 
Started by Tronman - Last post by Tronman
Well I got the heads off..  it wasn't the gaskets.  They looked great.  No evidence of leakage, it was all the LIM :-/

So I went a lot farther than I had to..  but I'll still take the heads in and have them cleaned, checked, and the new seals installed.  I suspect they're fine.

On the plus side, I found some broken exhaust manifold studs and some leakage, and boy will those bolts be easy to extract now versus on the engine..  Also fixing those leaks will reduce the incidence of air (oxygen) being sucked into the exhaust stream, fooling the computer into thinking the engine is leaner than it is.

Also on the plus side, the cylinders look fantastic!  You can still see some factory hone marks, there is no ring groove at all in any hole!  No wonder it's never used any oil.  So I feel pretty good about putting a freshened set of heads on this seasoned bottom end.  Also, I found the cold engine clickety clatter..  when I turn the crank back and forth, you can hear the timing chain go click click.  However it's only two degrees or so of engine rotation, still tight.  Wondering if I should bother replacing it now while it's all torn down..?  It has made the exact same noise when cold since the day I brought it home, BTW.
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 on: February 12, 2018, 01:02:12 PM 
Started by Highmileageaztek - Last post by Tronman
This sounds exactly like what mine has been doing, and you've done a lot of the similar things I did to chase down the problem.

If you have access to a scan tool with live codes and data, then use it to drive the car with calculated load percentage displayed.

I'll bet that when you hit about 38-42 percent calculated load, it goes to OL-D (Open Loop Drive) mode and sputters down to idle.  Then when you let go of the gas it goes back to CL (closed loop)?

If yes, then you have the same trouble I do.  After replacing the fuel pump, coil packs, module, wires and plugs (with NAPA parts, not cheeseballer O'Reilley's second line) and still having this issue, I eventually started getting PO300, random misfire.  Also LTFT (long term fuel trim) showing -4 or -5, indicating lean mixture.  What seems to be happening is the computer is cutting out the engine under load, because it's running lean, so as to not melt the catalyst in the converter.  Great for preserving the cat, but not so great for getting up that hill.

Having ruled out pretty much everything else, I'm leaning towards vacuum leak.  The first thing you can try, which is free, is to put a torque wrench on the bolts holding the upper intake manifold onto the engine.  The spec is 18 foot pounds or 25 N.m and mine were all finger loose after 227k miles. Start at the center and work your way out.
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 on: February 12, 2018, 12:42:25 PM 
Started by Aztek Jack - Last post by Tronman
Are you trying to buy the flex hoses going to each wheel, or the hard lines from the master cylinder?
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 on: February 11, 2018, 01:31:58 AM 
Started by Tronman - Last post by Tronman
The other thing I noticed is that when I removed the LIM, the rearmost bolt to the right was barely tight at all, like almost finger loose.  The others were all regular torque and required some effort to loosen.  Are the LIM bolts torque to yield?  Do I need to replace them?

This is all removing factory parts, no one has ever taken this engine apart before.
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 on: February 11, 2018, 01:26:44 AM 
Started by Tronman - Last post by Tronman
Yep, there's an internal coolant leak..

But I'm not entirely sure it's the head gaskets..  As you can see in the pic, I caught it pretty quick as the gunk hadn't even spread all the way from the rear of the engine to the front..  (left side of the car to the right..)
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 on: February 10, 2018, 09:16:07 PM 
Started by alaska AV - Last post by BlueGT
She hopes to have it done by May.
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 on: February 10, 2018, 12:28:52 AM 
Started by alaska AV - Last post by Tronman
Wow, it looks to fit right in..

Also <3 the license plate!!
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 on: February 10, 2018, 12:20:13 AM 
Started by Tronman - Last post by Tronman
Can't think of anything.  The vehicle has used slightly more coolant lately, but it's had a slow radiator leak for some time.  Due to a lean running condition which I believe to be the cause of a random misfire which causes the engine to go into OLD (basically return to a sputtering idle) like clockwork at 41 percent calculated load..  I'm taking the top off the engine for LIM gaskets anyway.

Since LIM is about eighty percent of the way to head gaskets, I'm gonna do 'em while I'm there.  Still hyped on my Aztek overall, I intend to keep it for another 200k miles..  plus the bottom end is solid, it's never used a quart of oil in total for the whole time I've owned it.
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 on: February 04, 2018, 07:02:40 PM 
Started by Tronman - Last post by wstefan20
Well that is strange.... usually coolant mixed with oil is milky and chocolate colored. This definitely isn't normal. Have you been losing coolant recently? If so, I'd rent a pressure tester at oriley's before condemning the engine. Any other info that might be pertinent?
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