DPFE Sensor/Exhaust issues.

[msimpson]

Ok here's the deal: The hoses on the DPFE sensor keep blowing off. I took it to a shop, they replaced the hoses.. they mentioned it might be clogged cats. (car runs like crap too, no performance). They quoted me $1700 for new cats plus labor. Would a clogged cat cause the hoses to pop off?

If the cats are likely the cause, would I be better of buying MSDS headers and doing the labor myself? It'll take me a few weeks, because I'm sure that job is a major PITA.

Let me know what you all think.

Thanks.

 

[BrApple]

yes, excessive exhaust back pressure will cause the dpfe hoses to blow off.



as for whats better, re: stock replacement cats vs msds headers ...


MSDS headers would win hands down. they are $220 iirc for the raw headers, add coating and what not is going to be far less then stock replacements and give you more performance also.

but before we jump the gun you need to do some testing to figure out if the cats are indeed plugged or not.

start here

 

[msimpson]

Thanks for the reply. It's suppose to rain all week, I'll probably get around to it next week. I guess now I have to drive my other POS for the time being... 91 mustang gt with a spec stage 3 clutch. It's oh so much fun going from that light pedal feel of the contour to that pedal feel of the mustang.

 

[AliasJerk]

Thanks for the reply. It's suppose to rain all week, I'll probably get around to it next week. I guess now I have to drive my other POS for the time being... 91 mustang gt with a spec stage 3 clutch. It's oh so much fun going from that light pedal feel of the contour to that pedal feel of the mustang.

its like arm wrestling with someone much larger then you

 

[msimpson]

its like arm wrestling with someone much larger then you

lol, right. I'm not a very big guy, but I've made larger guys press the pedal in on the mustang, and even they say it's a stiff mofo. Adjusting the cable has no effect either. As soon as it's time for a new clutch, I won't be using the stage 3.. that's for sure. I might try a centerforce this time around.

The spec clutch is weird to get used to as well, there is a very fine line when the clutch is engaged/disengaged. Very touchy, on hills.. at stoplights or what not, I probably look stupid. I'm paranoid about rolling back into the car behind me, so almost always the tires end up chirping. I know how to drive a stick, I just hate stiff clutches and hills.

And I thought my old king cobra clutch was bad when I had a T5 in the car... yea right.... Anyways, I'll try the plugged exhaust test once this weather gets better, hopefully I can determine which cat is clogged.

 

[msimpson]

Well, I gutted the pre-cats with the manifolds on the car.. took it to a local exhaust shop. He cut the main cat off and replaced with straight pipe, welded all of the holes up that I drilled to gut the pre-cats. The car runs great now, besides hesitating in the high rpm range. But that's a different problem, probably not exhaust related. Atleast the dpfe hoses aren't blowing off anymore. It's good to go now, not to mention... sounds pretty killer too.

 

[S2Knott]

nice man, i hate to see people go out and spend thousands of dollars on cats when this is the best alternative.

 

[ContourGuy9817]

well for a high rpm issue i would suggest plugs and wires. the difference will amaze you if it hasn't been done in a long while. i have had higher rpm issues a few times and the plug/wire maintenance has straightened it right up. and go with motorcraft replacement as well. don't go with the garbage because they claim high performance gains. as long as the ignition system is doing its job, then their will be no gains or loses, its simply doing its intended purpose of igniting the mixture.