Well, i think my car is running rich and the reason i say this is because sometimes i can smell fuel from the tail pipe, i have horrible gas mileage and the tailpipe is really black. What could be wrong? are these symptoms of the car running rich? another thing is my 9000 somtimes boggs down and loses power, when this happens i have to press the clutch put the car in neutral, give it a rev or 2 and then put it back into gear, it seems to work but then somtimes it does it again, i lose all power even with my foot to the floor the car does not seem to go, i was thinking maybe the engine is getting flooded by the extra fuel, idk its a guess, maybe the two are linked? any idea? please help
What year 9000 is this? If pre-trionic, a bad air mass meter can cause you to run rich and have driveability problems (though I never experienced anything as drastic as you described).
'94 doesn't use an air mass meter, so that's not it. It could be a faulty oxygen sensor, but could be other things as well. I never experienced it, but possibly a faulty injector or fuel pressure regulator.
Sorry, I am not experienced in how to check the injectors, or the Trionic system. The O2 sensor you can somewhat check with a multimeter, but if it has never been changed, or has over 60k miles, probably best just to change it anyway. The fuel pressure can be checked relatively easily, BUT, you have to have a fuel pressure gauge which you can attach and substitute for a bolt in the system (I used the one on top of the fuel filter). I wouldn't mess around with the fuel lines unless you know exactly what you're doing.
Most likely your coolant temperature sensor has gone bad, back of the head between # 2 and 3 cylinders NOT the sensor on the thermostat housing that just feeds the temp gauge. Bad sensor fails to tell the ECU that the engine is warmed up and can switch off the cold start enrichment program.
Another possibility is a leaking Fuel Pressure regulator at the end of the fuel rail,not as likely but this would affect the engine all the time. If the vacuum hose to the FRP cracks (leaks) the same effect will occur.
okay, ill check the sensor, ill take a pic just incase i cant find it so you can point it out, one more thing, are there any o2 sensor recommendations? Thanks guys
i know its not the same, but my jeep wrangler used to do the exact same thing your describing, the oxygen sensor was at fault. It would bog down and start backfiring, needed to pull over for a few seconds, give it some revs and it was fine.
Thanks for the help, i really dont know where that sensor your talking about is, so i took a pic of the engine bay, if some one can point out where it is, i would appreciate it.
and here is what the exhaust looks like (idk if thats normal)
heres our drive way
the aero is my dads and the black linear is my brothers
the two 900 and the blue 9-3
and my 9000
we have another 900, 9000 and a 00 9-5 at my dads mechanic :cheesy:
Coolant sensor should be on the back side of the head underneath all those hoses and wires, and between the #2 and #3 intake runners. You cannot see it in the picture.
Yes that's it (although there are different types for TCS etc). Might pay to get the Bosch OEM sensor. You need a 19mm socket about an 1 1/2 inches deep.
The bosch one on that site has the oblong connector, make sure you get the right fitment, a few $ more is always worth it to get the right part.
The red filter is for my cam breather (PCV) system, I've taken out the black plastic pipe from inner wing to turbo compressor and put a 3" stainless pipe in, so there wasn't anywhere for the pipe coming down the side of the head to go. I've simply looped the throttle body water pipes as it never gets that cold here, and I've sealed the small rubber pipe that comes from the turbo's metal water hose to the intake pipe, instead of the gases & little bits of oil going back through the turbo and clogging up my intercooler and rubber connectors next to it, I vent the gases to air, some people agree with this, some don't, but I want proper air when I'm boosting, not other obnoxious gases. I can't take much credit for this, others had it first, I basically tried to copy Marrk, some are using a catch can or any form of bottle to contain the oil that comes out.
I've left the vacuum side of the PCV alone, I was going to nip the hose, but I'm not bothered about the engine burning that little bit of fumes & oil, it makes no noticeable difference & the slight lubricant is probably a good thing for the upper cylindar wall (not 100% on that).
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