Lexus - Sc400 :: Engine Suddenly Stalls While Driving
Nov 27, 2012
Recently, after exiting the freeway, may car ( lexus 1995 SC400) suddenly stalls. After a moment of panic, i placed the emergency blinkers on,. coasted to a stop, and re started the engine. It started right away and I continued driving home. The engine sounded perfectly fine, no hesitation, no roughness. After a few days it happened again....again after exiting the freeway and slowing down for city traffic. The Garage that serviced my car for many years has checked the electrical system, replaced the spark plug wire set, cleaned " throttle body". These seemed to fix the problem. The car was fine for 6 months and then it happened again last week.
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It always (so far) starts right back up. So far it has not tripped a code or caused any service lights to stay on. I've cleaned the battery posts and don't know what else to do.
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2000 Jetta, 2.0 AEG engine with 220k miles, recently started intermittently stalling (about 15-20 minutes into my trip) while driving mostly on city streets but has also stalled on the freeway at 65mph. Fuel level is always > half full, verified against my tripometer. When it stalls, engine completely cuts off, all dashboard lights are all lit, and no power steering.
I have VCDS but know only enough to be dangerous My mechanic has no answers and I don't want to randomly throw new parts at this the car, hoping to resolve the problem. It's becoming seriously dangerous to drive, knowing it will die at least once on every trip. What's the chance the oxygen sensors need to be replaced ?
Symptoms
(1) Most of the time the engine just turns off, as if I turned off the ignition. Other times, I can catch the engine RPMs drop to ~300 and just hit the gas, which sometimes saves car from stalling.
(2) Immediately after it stalls, there is is rotten egg smell.
(3) Once stalled, the engine won't start back up again for at least 5 minutes. (turns over, but doesn't start)
(4) Confirmed error codes from VDCS: misfires on all cylinders and random
(5) Took it to my mechanic for diagnosis. They were unable to duplicate on a road test. Smoke test showed no vacuum leaks, road test monitoring data did not capture any additional faults, and found no faults running it heat soaked and parked. They captured sensor signal data and found no abnormal patterns. They feel replacing the O2 sensors is an expensive guess.
(6) Replaced the crankshaft position sensor after the car would not start at all, one morning. (discovered that the CPS tested at a faulty ~50k ohms). Bought a new one, installed it and it turned over immediately but the stall issue continues)
Fault Codes
Code:
18057 - Powertrain Data Bus
P1649 - 35-10 - Missing Message from ABS Controller - Intermittent
16684 - Random/Multiple Cylinder Misfire Detected
P0300 - 35-10 - - Intermittent
16685 - Cylinder 1
P0301 - 35-10 - Misfire Detected - Intermittent
16524 - Oxygen (Lambda) Sensor B1 S2
P0140 - 35-10 - No Activity - Intermittent
seen separately
Code:
16517 - Oxygen (Lambda) Sensor B1 S1
P0133 - 35-10 - Response too Slow - Intermittent
Note that I have been ignoring the ABS-related errors for 4+ years. (not a concern or priority). On the short list are ignition coil or crankshaft sensor. Both of which require my mechanic to replace, I think.
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I have a 1999 Venture Van. The engine has a low idle and stalls when stopped/parked after driving on the highway for 10 minutes or longer. Whenever I drive it to the train station in the morning to go to work, it dies as soon as I park it. It will start up again fine right away tho. I drive 10 minutes on the highway.
The engine light is on, but goes off sometimes for months before coming on again. I've brought it to at least 3 mechanics and they can't get the light to stay permanently off, and say to just drive as-is. But that still leaves me with the low idling problem. It doesn't always stall, but the potential is always there, as you can hear the low rpms threatening, and dread stopping at a light.
I had the engine light interpreted as P0122 TP SENSOR CIRCUIT LOW. The mechanic replaced the Throttle Positioning Sensor. Engine light came on again 2010. Mechanic did a Computer system check/smoke test. Diagnosed a Leak in evap system so they installed a new gas cap and vent valve. 2 months later, engine light went on again.
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1st problem is shifting from 1st to 2nd and sometimes from 2nd to 3rd though, 2nd to 3rd is not as bad as from 1st to 2nd. It stumbles and gets really bad if I don't let up on the gas. After the initial shudder it will go into 2nd just fine. I also have to gun the gas a little bit when I first start the car, or it will just sit there and idle and never go into gear.
2nd and more annoying is that it stalls after driving around a bit. It happens on freeway or city. It doesn't stutter or anything the rpm's drop to 0 and it just stalls and won't start up for a 5 - 10 minutes or so.
Codes pulled are P0731, & P0736. The transmission was replaced about 2 years ago with a refurbished one. Could it be going out again already? The guy at Autozone suggested replacing the TSS (Transmission Speed Sensor?) to see if that was the problem. I have not done this yet, but plan to.
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10 yr old V70 with 100K miles. Generally running well and fully serviced. Suddenly stalls, generally at low speed, without warning. No codes in system and mechanics could not replicate problem. After stop, starts up again with no problem. Idles fine.
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For the past week, my wife's 2004 GX A/C has been blowing hot air off and on. At first I thought this was due to low refrigerant but after pressure testing it appears to be full. Yesterday afternoon I was driving the car home and the A/C was blowing cool air then suddenly stopped again, I happened to look at the engine temperature gauge and noticed it creeping to "H". I shut down the air all together, pulled over and it cooled. The gauge actually stayed below the half way point the rest of the way home, until I had to stop at a light, then it slowly climbed up to the "H" again, the lowered as I drove to a cruising speed 55MPH. One home, I looked at the coolant reservoir and there was no fluid in it (not sure if this is normal) and there was no sign of smoke or fluid leaking. Could this be a thermostat issue, radiator issue, loss coolant issue???
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