I was talkin to the exhaust shop owner ( that I will be gettin a magnaflow hi flo cat put in next monday ) bout the issues I"m having that I believe is a clogged or clogging cat.. and he'* sayin it maybe the fuel pressure regulator going.. so my question is where is it located exactly ( pics please )

symptoms...

-car warms up quicker in idle then compared to the last 2 summers.
-rotten egg smell ( till recently.. I ran a bottle of Gumout Regane Maximum.. smell is gone, I believe the cleaner removed the carbon build up on the exhaust valve so it actually seals the exhaust valve now )
- lack of power ( seems slow for RPM to climb during WOT run till the last 1K of the RPM )

I remember reading before if you remove the regulator and fuel comes out of it.. that means the regulator is gone.. but I can't remember exactly where it is.. help.

Little black cylinder shape part in between the EGR tube and fuel rail in this pic: (yours should be in the same place)

thats the boost control solenoid


heres a better pic:

How bout we get a pic of a Series II in here. And it'* not remove the FPR, because fuel will definately come out, as the FPR plugs a hole in the fuel rail. Rather, pull the vacuum line off the FPR and look for fuel.

Let'* rule out FPR right now too because those aren't ANY symptoms of a bad FPR.


That'* a very clogged cat.

Come on guys, not that hard.

for the record here is the FPR, it looks similar on s1 and s2s

Well, this topic went interesting places.

You cannot compare FPR'* on a S1 and S2 L67 very easily, as they are in TOTALLY different locations.

Nor can you see the S1 L67 FPR from the front of the engine or even the rear from most angles. S1 L67 FPR'* are behind the TB on the rear of the fuel rail. IN the rail.

See the white line coming out of the brass fitting at the top of the pic? It'* heading to the rear of the engine compartment towards the FPR on a 95 SLE/SC.





See the shiny little bugger peeking out from under the engine cover just to the right of the top plug wire boot? That'* the FPR on the S2 L67.

The number one cause of a clogged cat is AGE. Is it original?
#2 is the O2 sensor. How old is it?
If it'* the FPR drooling, what does the O2 sensor think? You should have a rich condition. If not, the O2 sensor is very tired.

Let'* spend some time troubleshooting this and calling out the correct locations for components.

WOW how'd I f--- that up, I KNEW that! Yeah, that'* the FPR ^^^

I don`t believe it`* the FPR either but i `d like to check since its not hard to and who knows I can say I checked so don't **** with me.. and know not to go back to that shop ever again for any muffler work

the cat is only bout 2.5~ yrs.
I have not changed the 02 sensor for over 4 yrs that I had the car. I just got a scan tool today so I`d like to see what the 02 is reading currently before changin it ( Yes I"m cheap ) ( I`m also a noobie to scan tool so need reason to learn )

my first thought is the cat also. but I`d like to know how it dies so quick ( If it is ). bad gas, leakin exhaust valve, misfire, rich settings are the only thing I can think of.. so I"d like to resolve those issue before killin another CAT. ( I think it maybe resolved now with exhaust valve being cleaned off some ( don't have smell anymore ))

A few weeks/months ago.. my mechanic had a diferent tool that shows voltage on the 02 sensor ( real time ).. the front 02 would move with RPM change.. but the rear would stay constant.. he says it'* either a clogged cat or a dead rear 02 sensor.

Murdock, is this the same catalytic converter that was on the car when you went swimming IN your car?