Help ASAP, Mustang almost caught on fire!!!

[BurningRubber]

The line running from the plenum to that connector isnt blocked up, sure is charred though. I dont know about the other one, cause I cant even see where it ends... damn.

I bought my ODBII scanner from harbor freight for $40. Works great!

Does it read the codes and tell you what they are, or just read the codes and you need to figure them out?

 

[Mike97gt]

thats a EVAP emmisions line.

First thing you need to do is remove your intake plenum and clean out the EGR ports. The only thing I can think of off hand that could cause that is blocked up EGR ports or some sort of restriction causing the EGR gasses to backup into the EVAP line.

 

[Shiroelex]

I noticed that hose was pretty crusty on my car yesterday when I put my new plenum/TB combo on. It was actually the only thing under my hood that made my hands all dirty. It's just labeled gas because it's a high strength hose. I am going to rip that crusty crap out today and put in a nice new piece. All of the rest of the hoses under my hood looked great, except for that one, and a 90 degree bend on the front of the TB that connected to the PCV plastic tube. That was a little dryrotted.

I'd check your exhaust, to see if any plastic shopping bags or other crap have gotten stuck on there. I had a Meijer's bag float onto my X-pipe once, and that smelled like hell for a month. Good luck!

 

[BurningRubber]

thats a EVAP emmisions line.

First thing you need to do is remove your intake plenum and clean out the EGR ports. The only thing I can think of off hand that could cause that is blocked up EGR ports or some sort of restriction causing the EGR gasses to backup into the EVAP line.

Thanks a ton man, I thought it may be in relation to the EGR, but wasnt 100% sure. How many ports are there in the plenum and what should I clean them with? Should I clean the EGR aswell (if possible)?

So basically that line isnt doing anything that would normally conduct it to heat up like that? And where does that line run to? I noticed theres another one that snakes around and has a cap on it that says "1psi max. Hand tighten only" or something like that. I dont know if its the same line or not.




Shiroelex- I checked the exhaust out allready, nothing on it.

 

[DTNODYA]

Thanks a ton man, I thought it may be in relation to the EGR, but wasnt 100% sure. How many ports are there in the plenum and what should I clean them with? Should I clean the EGR aswell (if possible)?

So basically that line isnt doing anything that would normally conduct it to heat up like that? And where does that line run to? I noticed theres another one that snakes around and has a cap on it that says "1psi max. Hand tighten only" or something like that. I dont know if its the same line or not.




Shiroelex- I checked the exhaust out allready, nothing on it.

To start with, now that I know what hose you are talking about let me say that when I changed my plentum and took that hose off the stock plentum, it was disgusting. The hose had nasty ass black crap all over it and as someone stated above, it was dry-rotting (or so it looked). I took it off and sprayed the inside good with some throttle body cleaner and tons of black **** came out of it. I put it back on but I'm about to go to autozone and get a new piece of hose!!!!

As for cleaning your plentum, here's my suggestion (what I did when I replaced my intake manifold). Get some Throttle Body cleaner (spray) and take your plentum and TB off. For the TB which you may as well also clean, spray the TB cleaner on a rag and clean it that way. The plentum, just spray the crap out of the inside of it with TB cleaner spray. Do it over a trash can or something, just not on your garage floor or you'll have a mess. Spray all the ports out good and that will remove 90 percent of the gross-ness. Then, with a rag, wipe the inside down good until looks bling bling. Re-assemble.

 

[01Steeda]

thats a EVAP emmisions line.

First thing you need to do is remove your intake plenum and clean out the EGR ports. The only thing I can think of off hand that could cause that is blocked up EGR ports or some sort of restriction causing the EGR gasses to backup into the EVAP line.

Thats what I was talking about SVT tech.. mine on my truck were so bad it started heating everything connected to it up... actually had a line smoldering because of it.

 

[01Steeda]

you'll know where to clean once you get it broke down... just follow the carbon build up lol. cant miss it. I used carb cleaner and just let it soak in. then sprayed it out with more carb cleaner. worked like a charm.

 

[BurningRubber]

Thanks for more info on it. I should be able to get the codes pulled tomarrow morning, hopefully. After checking the codes ill decide on pulling the plenum or not (probaly will anyway, I know its nasty) and go from there. If im still stumped I guess ill just start the car and wait till it starts heating up again so I can get a sure idea of exactly what it is, but im pretty sure its that line.

 

[BurningRubber]

Thats what I was talking about SVT tech.. mine on my truck were so bad it started heating everything connected to it up... actually had a line smoldering because of it.

That does sound like what happened. The IAC lines didnt look burned, but this one had soot all over it and the port that it connects to, plus its right next to the EGR.

So carb/tb cleaner and spray the hell out of the plenum & EGR ports...

 

[BurningRubber]

Pulled the codes... heres what the scanner told us.

2 codes

o2 sensor, bank 2, sensor 1

fuel/air meter malfunction.



Not what I was expecting...

Guess ill pull the plenum and clean it out anyway. I still need to know where that line that was cooking runs to though. There is another one just like it that pops up next to it with a little green cap. Unscrew the cap and it has a bleeder valve on it.

 

[BurningRubber]

Ok I just cleaned the TB and plenum, sprayed the IAC out and cleaned all of the ports in the plenum. It was nasty as hell, but none were blocked off.

Ok, put it all back together and fire it up. Idles rough for a second and I blip the gas, and it still idles a little rough. I get out and walk around front and start sniffing under the hood. Nothing yet. So I walk around back and notice my exhaust sounds... different. Nice little misfire going on..

Go back and tap the gas real quick, seems like it coughed a little bit and then it settled back down and the miss went away. Now I can smell the burning plastic again, so I shut the car off and grab the line I showed in those pictures... Guess what? NOT HOT! ...

Start smelling it and its coming from the same spot as last time, but I dont see anything that looks like its heating up!!! This is starting to stump me. Im about to put it up on some jacks and crawl under and see if I find anything weird, like possibly an o2 wire is burning through on the exhaust that I didnt notice the first time.

And again... the codes:

2 codes

o2 sensor, bank 2, sensor 1

fuel/air meter malfunction.

 

[BurningRubber]

Hahaha... found it.

The little "shield" type thing that sleeves around the o2 sensor wires had worn out and fallen onto the o2 sensor and the converter. It was at the very top so I had no way of seeing that yesterday when I looked.

I pulled a good size chunk of melted and brittle plastic off the converter, the rest is baked on and stinking up.

I dont know why it threw those codes though. Is there any way that happening ruined the o2? Either way, it runs fine.

I also pulled the tb and plenum and cleaned them. Dear God they were nasty!!! When I put it all back together and fired the car up it had a very noticable miss for a few seconds, but it went away right after I blipped the gas...

If you guys know what would have caused those codes let me know, thanks for all the help...:SNSign:

 

[DTNODYA]

Hahaha... found it.

The little "shield" type thing that sleeves around the o2 sensor wires had worn out and fallen onto the o2 sensor and the converter. It was at the very top so I had no way of seeing that yesterday when I looked.

I pulled a good size chunk of melted and brittle plastic off the converter, the rest is baked on and stinking up.

I dont know why it threw those codes though. Is there any way that happening ruined the o2? Either way, it runs fine.

I also pulled the tb and plenum and cleaned them. Dear God they were nasty!!! When I put it all back together and fired the car up it had a very noticable miss for a few seconds, but it went away right after I blipped the gas...

If you guys know what would have caused those codes let me know, thanks for all the help...:SNSign:

Ummm..... Well, somehow what the codes are telling you is related to that o2 sensor, maybe it overheated or something ... I dunno. Either way, why would that cause that hose to burn? Confusing ...

I guess you could take that o2 sensor out and spray it with brake parts cleaner or some sort of cleaner because it is probably funkadelic too. It should run a lot better with the TB and plentum clean.

 

[BurningRubber]

Ummm..... Well, somehow what the codes are telling you is related to that o2 sensor, maybe it overheated or something ... I dunno. Either way, why would that cause that hose to burn? Confusing ...

I guess you could take that o2 sensor out and spray it with brake parts cleaner or some sort of cleaner because it is probably funkadelic too. It should run a lot better with the TB and plentum clean.

I dont know, but my guess is probaly the same as yours with the o2 sensor. I think the thing that fell on the converter was just old and tattered, it wasnt that hose in the pictures. It was like a little plastic peice that slips over the o2 sensor wires. The one on the drivers side is still in-tact.

As far as the TB and plenum being clean, I noticed a huge improvment. Throttle response is alot better, idle doesnt dip now (proably thanks to a clean IAC) and it feels smoother. I reccomend anyone do that if they havnt recently. It took no time at all to get the plenum off and pull it apart.

 

[DTNODYA]

Just make sure that there isn't any large 'blobs' of melted plastic on there because I don't know if you have ever seen plastic on fire .. very difficult to put it out. If there is a blob of crap on there, wait until your pipes are completely cooled down, take a flat head screwdriver and a hammer, you should be able to hit the plastic and chip it off ... (if that made sense)

If there isn't much on there, don't stress it. If it is running fine, I wouldn't worry about it. Oh yeah, I forgot to tell you in my earlier post, when you take your TB and plentum off, you should disconnect your battery to reset the comp. before you start it back up. If you didn't, that is probably why it was idling like poo for a few seconds when you cranked it. I assume your the comp. will re-learn even if you don't disconnect the batt. If it is not running perfectly, try re-setting.

 

[Kilgore Trout]

All I can say is WOW! I am going to be checking/cleaning all the stuff mentioned in the thread ASAP!

 

[BurningRubber]

All I can say is WOW! I am going to be checking/cleaning all the stuff mentioned in the thread ASAP!

Hahaha, it had me stressed for a day or so. I felt stupid when I found what it was, but at that point I was just glad its nothing more serious. Guess I need a new o2 sensor now...


DTNODYA- I dont think theres much left on there, all I pulled off was a little strip... Plastic fires arent fun, ive torched a few plastic things in my days, haha... its kinda like lava, yet not quite as bad... Anyhow, ill probaly try and get the rest off soon.

Im gonna see if I can load any pics of my plenum and how nasty it was...