- #1328 of 1380
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Re: A/C is always on [iamz]
by Mr_Shiftright HOST
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Nov 26, 2008 (9:29 am)
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Replying to: iamz (Nov 26, 2008 5:00 am)
You could pull a plug and fish around in there for something, or scope it and see if there's some debris. You could have "chunked" part of a piston top or someone could have dropped something in there or installed the wrong plugs.
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- #1329 of 1380
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Re: Engine Problems =S [Countryham]
by oldman15
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Nov 27, 2008 (8:53 am)
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Replying to: Countryham (Nov 23, 2008 7:15 am)
As to LOUD ENGINE KNOCK & DAMAGED SPARK PLUG:
There was a recall on 2/3 P5. Original intake manifold had brass screws in it that would come loose. Replacement elimenated screws.
2 yrs ago had a terrible knock; thought I had broken a rod, etc. Dealer was aware of the recall. During replacement found there was a missing screw. Actual screw was never found; mechanic thought it may have bounced around, maybe melted, or just blew out of exhaust port.
A screw flying around might cause some plug damage, or partially melt onto valve( don't know how realistic that could be?), causing fouling of one cylinder.
At least something to investigate. Good luck.
Oldman15
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- #1330 of 1380
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Re: A/C is always on [pete79]
by winston3x
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Nov 27, 2008 (10:00 am)
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Replying to: pete79 (Nov 25, 2008 11:08 am)
the compressor will not turn on in the vent/feet position.
there is a mod to over-ride the idiot proof design but it is not for the faint of heart. it involves cutting part of the circuit board, here's the link
a/c always on mod
I just keep mine in the vent/feet position and close the vents when I need to.
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- #1331 of 1380
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Re: A/C is always on [winston3x]
by pete79
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Nov 27, 2008 (10:30 am)
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Replying to: winston3x (Nov 27, 2008 10:00 am)
Thanks a lot for that link!!! This is exactly what I was looking for (although they say it's nothing hard to do, I thought it would be simpler...)!!!
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- #1332 of 1380
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Re: Engine Problems =S [Countryham]
by Countryham
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Nov 28, 2008 (3:11 pm)
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Replying to: Countryham (Nov 23, 2008 7:15 am)
I'm replying to my own post - I took my P5 to the Mazda dealer in Raleigh, NC (Southern States Mazda) on Wednesday, armed with all the posts about the Intake Manifold Shutter Valve Emission Recall off www.mazdas247.com/forum, www.mazda3club.com/forum, and the issues I have had with the car. Even though I'm the second owner, the car's out of warranty and was sold new by another dealer, Southern States found the problem, had a new intake overnighted in, and I picked up the car today - NO CHARGE!! Happy Friggin' Thanksgiving to me!! The bolts from the intake were all missing, and in the compression chambers, and anytime the revs exceeded 5400, they started moving around and one got between the piston and the plug -twice. I'm totally lucky that the motor didn't bomb out. If you have the same problems, it's not compression or any of the other things I surmised - just a manufacturers defect that the dealers know exists. Make them do what they did for me and quit trying to figure it out, bizarre as it is...
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- #1333 of 1380
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by Countryham
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Dec 01, 2008 (3:49 am)
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I'm replying to my own post - I took my P5 to the Mazda dealer in Raleigh, NC (Southern States Mazda) on Wednesday, armed with all the posts about the Intake Manifold Shutter Valve Emission Recall off www.mazdas247.com/forum, www.mazda3club.com/forum, and the issues I have had with the car. Even though I'm the second owner, the car's out of warranty and was sold new by another dealer, Southern States found the problem, had a new intake overnighted in, and I picked up the car today - NO CHARGE!! Happy Friggin' Thanksgiving to me!! The bolts from the intake were all missing, and in the compression chambers, and anytime the revs exceeded 5400, they started moving around and one got between the piston and the plug -twice. I'm totally lucky that the motor didn't bomb out. If you have the same problems, it's not compression or any of the other things I surmised - just a manufacturers defect that the dealers know exists. Make them do what they did for me and quit trying to figure it out, bizarre as it is...
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- #1334 of 1380
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Re: [Countryham]
by pat HOST
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Dec 01, 2008 (7:11 am)
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Replying to: Countryham (Dec 01, 2008 3:49 am)
That's great news! Consider posting this in our Dealer Ratings & Review section as well. It's always nice to have the good stories to go with the bad. 
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- #1335 of 1380
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Re: [pat]
by mavswimmer
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Dec 02, 2008 (7:15 am)
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Replying to: pat (Dec 01, 2008 7:11 am)
wow, so over the thanksgiving holiday, i took off the valve cover and looked around inside for anything out of order with the cams and valve springs, nothing really out of the ordinary...put a new valve cover gasket, replaced the spark plugs...while i was changing them, i took a flashlight and looked through the open hole where the spark plug fits into the head...the surface of the piston was completely carbonized(nothing out of the ordinary) but it was also very very pitted!!! evidence of something very wrong! anyways, didnt really know what to do from there, so, put the valve cover back on, tightened all the bolt on the intake manifold(all were loose!!!!)(also added monkey grip to them all)...then started that sucker up...mixture was off, it was running very lean for about 20miles...but thats because i took off the injectors...mixture sorted itself out, and now it runs like a beauty! no issues with the timing belt...so i was wondering, could it have been a loose intake manifold?...just knocking against the block???...while the valve cover was off, had fun turning the engine over and squirting oil in my dad's hair, that was funny! check engine light is off, and no problems are evident...can someone give advice whether i should drive it, or still take it in? I have no Mazda garage within 200miles of me, i would have to travel to Denver( Live in Grand Junction)
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- #1336 of 1380
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Re: [mavswimmer]
by iamz
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Dec 02, 2008 (9:43 am)
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Replying to: mavswimmer (Dec 02, 2008 7:15 am)
It could have been the loose manifold if it was letting in huge amounts of unmetered air resulting in incomplete combustion or not at all. Hard to say. Has anyone had your intake manifold off in the past for any reason?
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- #1337 of 1380
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Re: [mavswimmer]
by Mr_Shiftright HOST
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Dec 02, 2008 (10:06 am)
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Replying to: mavswimmer (Dec 02, 2008 7:15 am)
I think there was something in there hammering the top of the piston and you blew it out either by running the car or by spinning the engine with the plugs out (if you did that).
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