pop goes the 5.0

[ZmanM3]

Wow, sorry about your engine. This is the first I've heard of a MAF failing.

 

[19COBRA93]

Wow, sorry about your engine. This is the first I've heard of a MAF failing.

I've sold 3 or 4 of them for the new 5.0's. One was a Procharged car, the others were all stock.

 

[matt06]

what would cause them to fail? I would have assumed failing would throw the car into a fail safe mode, obviously didnt happen here.

 

[DILYSI Dave]

what would cause them to fail? I would have assumed failing would throw the car into a fail safe mode, obviously didnt happen here.

Might be talking out of my ass here, but maybe not...

Car is boosted. Car is tuned. All is well. Uh oh - sensor fails. PCM tries to go into safe mode, but it has a different set of tables - tables that are conservative for a stock car, but don't have enough fueling for a boosted car. Engine goes boom.

Now, I don't know if there is a different set of tables or not, but if there is, and the only ones that are changed with a tune are the normal tables, then that could cause the above.

 

[19COBRA93]

When the one on my buddys car failed his car simply died and wouldn't restart. We were an hour into a 6 day trip to a Mustang show. I convinced one of my co-workers to pull a sensor from a 5.0 on our lot so we could get on our way.

Pic of the roadside repair (because of the location of the sensor on the intercooler, the bumper cover had to come off to replace the sensor):

 

[matt06]

nice lol. i just know with my car i had a intercooler tube come apart which caused the maf reading to be off and in turn put the car into a safe mode, figured if the sensor had gone bad it would have done similar.

 

[gimpy]

When the one on my buddys car failed his car simply died and wouldn't restart. We were an hour into a 6 day trip to a Mustang show. I convinced one of my co-workers to pull a sensor from a 5.0 on our lot so we could get on our way.

Pic of the roadside repair:

Dont you just love how the maf is on the side of the intercooler on the stage 2 kit!

 

[stang8psi]

just wondering why they are failing and how often they do, And it seems to be a real shitty way for a motor to blow due to a factory maf.

 

[19COBRA93]

nice lol. i just know with my car i had a intercooler tube come apart which caused the maf reading to be off and in turn put the car into a safe mode, figured if the sensor had gone bad it would have done similar.

And it may do that still in certain circumstances. In our case, the car would fire for half a second then die, as if the fuel pump had failed. We spent nearly 4 hours on the side of the road trying to diagnose the car with limited resources. It was only when, on a whim, we unplugged the maf, then tried starting it, and it fired right up.

 

[19COBRA93]

just wondering why they are failing and how often they do, And it seems to be a real shitty way for a motor to blow due to a factory maf.

I can't say on the others, but for this one, the oil seal on his Procharger failed while on the dyno, which contaminated the whole system with oil. On that particular pull, the car made 711rwh but melted 3 pistons and bent 4 rods. So all in the same moment we had multiple failures, one likely led to another. We suspect the oil from the failed seal is what damaged the sensor, and then caused a major lean condition (afr spiked right at the end of the pull) at 7500 RPM taking out the motor.

 

[GerRod]

I've been running Kooks high flow cats with my Whipple for almost a year now due to our parish (county) requiring emissions testing. There are only 5 parishes in the state that requires the testing so when I renewed my registration last week, I registered my car to a non emissions testing parish. After doing so, I ordered the off road legs to my exhaust system that remove the cats. As soon as I take them off, I'll post pictures.

 

[19COBRA93]

I've been running Kooks high flow cats with my Whipple for almost a year now due to our parish (county) requiring emissions testing. There are only 5 parishes in the state that requires the testing so when I renewed my registration last week, I registered my car to a non emissions testing parish. After doing so, I ordered the off road legs to my exhaust system that remove the cats. As soon as I take them off, I'll post pictures.

Is a Parish like a county?

 

[SS KILLR]

Sounds all to familiar. Does procharger have a warranty?

 

[19COBRA93]

Sounds all to familiar. Does procharger have a warranty?

Yes. We sent the head unit back to them and they rebuilt it at no charge.

 

[weather man]

When the one on my buddys car failed his car simply died and wouldn't restart. We were an hour into a 6 day trip to a Mustang show. I convinced one of my co-workers to pull a sensor from a 5.0 on our lot so we could get on our way.

I think it pretty freaking amazing you fixed a modern computer controlled Stang on the side of the road! I salute you!

And had 2 jacks with!?!

 

[Fullboogie]

Because the cats can come loose and clog up your exhaust pipe...ask me how I know....and it seems it's either the added fuel for FI or the added air pressure that makes the cats come apart although Lightblades came apart when he was NA.

Lots of threads on here about FI guys that blew out their cats and a couple of them lost engines due to it.

Then how are there 600 plus hp GT500s running factory cats with no problems? It's the aftermarket junk that falls apart.

 

[klaw]

Then how are there 600 plus hp GT500s running factory cats with no problems? It's the aftermarket junk that falls apart.

OEMs fail as well. My buddy just pulled his stockers off his GT500 and they were trash (quoted from his build thread):

"There is the OEM catalyst mid-pipe, and yes, it was shot. The passenger side cat was internally broken up as evidenced by sparkly pixie dust that shifted around when shaken. The damage wasn't apparent enough for photos, but under a flashlight it was pretty obvious to the eye. The driver side unit appeared okay but they are off to the scrapper as a pair."

http://www.fastfordsofcanada.ca/forum/index.php/topic,29.0.html

 

[GerRod]

Is a Parish like a county?

Yes...

 

[hightechrdn]

Might be talking out of my ass here, but maybe not...

Car is boosted. Car is tuned. All is well. Uh oh - sensor fails. PCM tries to go into safe mode, but it has a different set of tables - tables that are conservative for a stock car, but don't have enough fueling for a boosted car. Engine goes boom.

Now, I don't know if there is a different set of tables or not, but if there is, and the only ones that are changed with a tune are the normal tables, then that could cause the above.

Any feedback on safe mode with tunes for the 5.0? Are they not fixed to make a safe AFR if a sensor dies on a tuned car?

Sent from my NookColor using Tapatalk 2

 

[Fullboogie]

OEMs fail as well. My buddy just pulled his stockers off his GT500 and they were trash (quoted from his build thread):

"There is the OEM catalyst mid-pipe, and yes, it was shot. The passenger side cat was internally broken up as evidenced by sparkly pixie dust that shifted around when shaken. The damage wasn't apparent enough for photos, but under a flashlight it was pretty obvious to the eye. The driver side unit appeared okay but they are off to the scrapper as a pair."

http://www.fastfordsofcanada.ca/forum/index.php/topic,29.0.html

Thanks for the info, Klaw. That's the first I've heard of a stocker failing, but I admit I'm not keeping a running tab on this. My comment was based on the threads at SVT dealing with this issue. Food for thought, though.