Analyzing a critical engine flaw in the 4b11 by TTP
#181
Evolving Member
iTrader: (9)
Join Date: Apr 2007
Location: In the Middle of Everywhere
Posts: 434
Likes: 0
Received 1 Like
on
1 Post
#182
Sspperformance is selling the blue one it's pretty cheap. You can do all those test but the only way to make sure is having a afr gauge. It's so hard to figure out your running lean on the 4b11 without a afr gauge. It's crazy that a 10 dollar part is causing all this problems.
#184
Probably because the car runs so rich on stock tune that when it goes bad it doesn't really affect it. I could be wrong though. As far as the modded and tuned cars all I know is that GST is the shiznit and we don't have this problem out here thats documented in Norcal.
#186
Evolved Member
iTrader: (34)
It is a relay... I doesn't matter if you are stock or tuned.. that makes no difference to how the relay works...
The problem comes when you are tuned and it goes bad, then you end up running leaner than you want. Like someone said above, you are already pig rich from the the factory, so an untuned car will not have such adverse affect if the relay fails.
The problem comes when you are tuned and it goes bad, then you end up running leaner than you want. Like someone said above, you are already pig rich from the the factory, so an untuned car will not have such adverse affect if the relay fails.
#187
Evolving Member
iTrader: (2)
Join Date: Nov 2008
Location: Meridian, ID
Posts: 298
Likes: 0
Received 0 Likes
on
0 Posts
Test pipe - WGA or stock one tightened - MBC
Now your AFR's are suddenly in the 13's with IDC's @ 100% because your pump can't kick it up a gear. On a fully stock car it doesn't ever really need to.
#188
We have seen datalogs of Evo X's during a failure along with boost, EGT and AFR and lean condition did not present itself in the datalog we had been sent to review.
I am sure that in some cases there is truly a handful of bad relays, however I also believe it is a scapegoat for a other failures.
I am sure that in some cases there is truly a handful of bad relays, however I also believe it is a scapegoat for a other failures.
#189
That looks like what happened to my first engine almost 2 years ago.
Dealer replaced shortblock under warranty. Guess what? It's broken again, and sitting at the dealer. They are tearing apart the block now.
I'm too superstitious to provide any more details than that until I get my second motor replacement under warranty approved. Fail 1 ~8k mi, fail 2 ~16k mi.
Dealer replaced shortblock under warranty. Guess what? It's broken again, and sitting at the dealer. They are tearing apart the block now.
I'm too superstitious to provide any more details than that until I get my second motor replacement under warranty approved. Fail 1 ~8k mi, fail 2 ~16k mi.
Last edited by mikebutler; Mar 25, 2010 at 01:54 AM.
#190
Damn! So the weak points of the 4b11 are starting to show its ugly head.
1. center differential pins give out
2. rod bolts that loosen up
3. pistons that desintegrate
Thats just great. Now I have to save and plan to build my short block soon (w/ forged parts). This sucks! That money is supposed to go elsewhere..
1. center differential pins give out
2. rod bolts that loosen up
3. pistons that desintegrate
Thats just great. Now I have to save and plan to build my short block soon (w/ forged parts). This sucks! That money is supposed to go elsewhere..
#191
Evolved Member
iTrader: (1)
Join Date: Nov 2009
Location: Omaha, NE
Posts: 1,456
Likes: 0
Received 0 Likes
on
0 Posts
That looks like what happened to my first engine almost 2 years ago.
Dealer replaced shortblock under warranty. Guess what? It's broken again, and sitting at the dealer. They are tearing apart the block now.
I'm too superstitious to provide any more details than that until I get my second motor replacement under warranty approved. Fail 1 ~8k mi, fail 2 ~16k mi.
Dealer replaced shortblock under warranty. Guess what? It's broken again, and sitting at the dealer. They are tearing apart the block now.
I'm too superstitious to provide any more details than that until I get my second motor replacement under warranty approved. Fail 1 ~8k mi, fail 2 ~16k mi.
#193
Evolved Member
iTrader: (1)
Join Date: Nov 2009
Location: Omaha, NE
Posts: 1,456
Likes: 0
Received 0 Likes
on
0 Posts
That's what I was thinking, but I want a confirm.
He would make 2 confirmed stock piston-ring issues.
Also, MikeButler, what Fuel Pump Relay do you have? Have you ever checked it?
He would make 2 confirmed stock piston-ring issues.
Also, MikeButler, what Fuel Pump Relay do you have? Have you ever checked it?
#195
Evolving Member
iTrader: (3)
Join Date: Oct 2004
Location: USA
Posts: 476
Likes: 0
Received 0 Likes
on
0 Posts
That looks like what happened to my first engine almost 2 years ago.
Dealer replaced shortblock under warranty. Guess what? It's broken again, and sitting at the dealer. They are tearing apart the block now.
I'm too superstitious to provide any more details than that until I get my second motor replacement under warranty approved. Fail 1 ~8k mi, fail 2 ~16k mi.
Dealer replaced shortblock under warranty. Guess what? It's broken again, and sitting at the dealer. They are tearing apart the block now.
I'm too superstitious to provide any more details than that until I get my second motor replacement under warranty approved. Fail 1 ~8k mi, fail 2 ~16k mi.