Quote:
Originally Posted by 97 SL320
Look for the fuel injector rail ( chrome tube running front to back ) at the very front, there will be a chrome can about 1 1/4" dia with a single vacuume hose attached to one side, pull the black hose and have a look.
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Yup, that's the one I was checking it's dry!
Quote:
Originally Posted by 97 SL320
If you check O2 voltage with wiring connected, you will see the 0.500 volt bias from the engine computer. If you disconnect it, you can measure actual O2 voltage and the computer will remain in open loop. This is where the computer runs in a neutral mixture range.
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Now I'm less sure of this
I just tested it again, after letting the car warm up, should this voltage range be in mV? When disconnecting the vacuum line (the same one as above), it holds steady at ~13 mV. Revving the engine for a second and letting off shows 300-400mV for a moment then back to fluctuating. I am not sure how much of this is a cheap chinese multimeter vs real measurements though, or if I'm measuring in the right range. I thought it should be .1-.9 V but got nothing but zeros in that range on my multimeter, so set it to 2000mV when testing, and it is jumping up and down fairly regularly.
Quote:
Originally Posted by 97 SL320
If your coolant temperature sensor for the engine computer has failed open, the computer thinks the motor is cold and is applying a rich mixture.
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Would this throw a code? How do I check this? I was going through coolant this summer more than I'd expect... maybe related?
Quote:
Originally Posted by 97 SL320
If the engine is running rich for a long period of time the car will clog , in extreme cases it will melt.
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Crossing my fingers that hasn't happened... can I see either of those visually? Is there a way to "unclog" it if that has happened?
Quote:
Originally Posted by 97 SL320
95 is on the the tail end of "bio degradable" insulation wiring , have a close look at exposed wires and lightly rub them, if the insulation falls off, you will need to replace the harness before any other work is done. Short term you might be able to cut the shrink wrap and tape up wires.
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I haven't seen this at all, I believe the former owner must have replaced it because I've read that's a big problem with these cars, and mine has over 200k miles!