TSB 11-07-07 Piston Failure
01-20-2012, 02:39 AM
#151
4th Gear Member
Join Date: Sep 2010
Location: Not sure
Posts: 1,724
Im 18, got my 2010 when I turned 17. Has nothing to do with being a spoiled brat, I was just fortunate to have parent who were able to buy me the car, and I know that each and every day. I am 100% aware that if it wasnt for my parents I wouldve had to sell my quads and probably be leasing an altima or something
02-07-2012, 03:18 PM
#152
Join Date: Dec 2011
Location: NJ
Posts: 1
This TSB covers what we know is the #8 Piston failure, and it describes how to determine if aftermarket parts were ever put on the vehicle and to proceed with voiding the warranty. Although if something comes up unrelated to the modification they are supposed to still fix it though they may try to deny it.
A little bit scary, so far the people who have the #8 piston failure have just a tune or cai+tune, are running a 93 octane tune from various tuners and atleast a couple at one point had bad gas or lower octane gas in the tank with that tune.
Go ahead and post any reports you know of this issue. It is disconcerting, I don't believe any mustang has ever been actually known to have issues with a cai+tune only. especially since we know people are hitting 600-700whp on the stock engine without this issue.
A little bit scary, so far the people who have the #8 piston failure have just a tune or cai+tune, are running a 93 octane tune from various tuners and atleast a couple at one point had bad gas or lower octane gas in the tank with that tune.
Go ahead and post any reports you know of this issue. It is disconcerting, I don't believe any mustang has ever been actually known to have issues with a cai+tune only. especially since we know people are hitting 600-700whp on the stock engine without this issue.
If it turns out that there is a known lean condition on #8, it could also be very possible that the flow to that cyl. is marginal as per original Ford intake runner/plenum design, particularly if a number of engines have experienced that condition.
If so, it is likely that Ford is well aware of the condition, and which may be exacerbated under non-Ford tunes...
02-07-2012, 05:30 PM
#153
Mish-ogynist
Thread Starter
Join Date: Nov 2007
Location: Helena, MT
Posts: 3,780
#8 was failing due to detonation, detonation caused by changing the knock sensors so they don't pull timing. So you get detonation because the timing was advanced too far by early tuners... and sub-par gasoline or a myriad of other non-optimal conditions can lead to it. Since then tuners aren't screwing with the knock senors and are making their tunes a bit more conservative.
02-08-2012, 08:37 AM
#155
3rd Gear Member
Join Date: Oct 2004
Location: IL
Posts: 562
02-10-2012, 04:26 PM
#156
Mish-ogynist
Thread Starter
Join Date: Nov 2007
Location: Helena, MT
Posts: 3,780
I haven't heard about any issues in awhile. Every time I've seen a claim from someone saying they were stock with a #8 issue someone pulled up the claim and proved that the ECU was sent to ford and that the person had a non-factory tune on it at some point and returned it to stock. I'd like to see proof that someone who never had an aftermarket tune had #8 go on them.
02-10-2012, 06:19 PM
#157
2nd Gear Member
Join Date: May 2008
Location: OH
Posts: 317
I haven't heard about any issues in awhile. Every time I've seen a claim from someone saying they were stock with a #8 issue someone pulled up the claim and proved that the ECU was sent to ford and that the person had a non-factory tune on it at some point and returned it to stock. I'd like to see proof that someone who never had an aftermarket tune had #8 go on them.
Either way, the sky is not falling, and your chance of a #8 failure with or without a tune is pretty much statistically insignificant.
09-17-2012, 07:43 PM
#158
1st Gear Member
Join Date: Jun 2012
Location: Oregon
Posts: 81
It could be a combination of (3) factors:
1. Tunes push the car to the engine's tolerances.
2. People who use tunes tend to beat on their cars more then people who don't.
3. Far more people have tunes then blowers as already mentioned.
I suspect that Ford tunes their cars to allow for imperfections in engine build. Tuning the car leaves less room for error.
1. Tunes push the car to the engine's tolerances.
2. People who use tunes tend to beat on their cars more then people who don't.
3. Far more people have tunes then blowers as already mentioned.
I suspect that Ford tunes their cars to allow for imperfections in engine build. Tuning the car leaves less room for error.
This is a great thread. Thanks to Mishri for posting it.
09-18-2012, 12:24 PM
#159
5th Gear Member
Join Date: Jan 2006
Location: Florida
Posts: 2,398
I think #2 is spot on!!!! Who drives their car easier when they've just gotten more power to play with?? NOBODY.... at least not untill the newness wears off. Having said that, it still doesn't answer why they would deny a warranty just because of a cat back system, or other mods that have no effect on the cooling of # 8 cyl? How does a cat back sys. burn up #8 cyl? WTF?
This is a great thread. Thanks to Mishri for posting it.
This is a great thread. Thanks to Mishri for posting it.
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