Buick - Lesabre :: 1994 V6 Smooth When Idling In Park But Rough Idle In Gear?
Mar 25, 2012
1994 Buick LeSabre Custom 3.8 Litre V6 with 103277 miles.
It runs smooth when idling in Park, rough when I put it in gear when I am stopped (either drive or reverse) has hesitation when accelerating, it smooths out again when driving then it starts to drive rough at about 55 MPH.
Mechanic told me it was the plug wires. I replaced those and the plugs. This fixed the hesitation when accelerating issue, but the other issues remain (now even seem a little worse) I thought the plugs and/or wires were bad, so I rechecked the gauge on the plugs and traced to make sure I had the wires hooked up right. Everything seems in order.
I have added fuel injector cleaner, and changed the oil, oil filter, spark plugs, spark plug wires, air filter, flushed the radiator, and changed the thermostat. (For a tune up since it has admittedly been a while)....
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I have a 99 lesabre cold start rough idle but smooths out . Warm no start. Trouble codes P0171, P0300, P0336. Had plennum replaced 2 years ago but I'm seeing coolant around the base of the plennum so I'm going to have to do that again but I don't think that has anything to do with the warm no start.
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My Buick has started acting weird and I've had a hard time figuring out what's going on. As I understand it 94' was the transition year for the OBD1 and OBD2 sensors, therefore auto zone and o'reilly haven't been able to pull codes on my car. It runs off of OBD1 codes but has 16 point OBD2 sensor pins.
Here's the problem: When the car is started it revs up to 2000rpm at idle, when shifted into neutral the rpm jumps up to 3500. In drive and reverse it goes back down to 2000rpm. While driving the car is hard to stop and surges when I take my foot off the break, it also gains speed on flat ground without touching the gas pedal. After driving the car when I put it back in park it revs back up to 3500rpm and is quite noisy.
I've replaced the mass airflow sensor, cleaned out the entire throttle body (there was a little carbon build up but not too bad), replaced all the vacuum hoses(that put a stop to it for about a week), and I'm still having the same problems. I recently replaced the a/c pump because the bearings went bad but I don't think that would cause any problems like this.
I have a very, very slight gasket leak on my valve covers but it's been like that for the last few months and the car was acting fine. The car has done this before but it usually stops after you drive it somewhere. The hotter it's gotten out the more often it started happening and now it's not stopping like it did before.
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I have a 94 buick lesabre custom that is stalling intermittently and runs rough intermittently. We have had it for diagnostics and it could not read the codes. We changed the computer and it still can't read the codes. The diagnostic tool says it cannot connect when it is plugged in or it displays white flecks like snow flakes on the tool screen. It is an OBDII. The pin structure of the data connector port is two pins top row and bottom row two pins some blanks and one pin. We don't know how to fix it with no diagnostic codes and we don't know what to do to get the codes because we have changed the computer.
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I have a 1994 Buick LeSabre Limited with a 3800 engine.When the engines cold,it starts fine and drives fine.When it reaches operating temp,if you shut it off. It will crank but not start back up until its cold again. I've replaced the crank and cam sensors but no change.
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Last November my car began stalling while idling at stop lights. It didn't happen all the time, just occasionally. The car would start back up without too much difficulty. I took it to a GM dealer who cleaned the throttle body and decarburized the intake and exhaust valves. They also removed an aftermarket security system which had been installed by the previous owner which they claimed may have interfered electrically with the engine. They reported a history of code P0128 (thermostat sticking open) being stored in the ECM. I did not have the thermostat replaced.
The work the dealer performed did not resolve the issue. During the winter, I've been letting the car warm-up for a few minutes before driving. While warming up, the rpms will sometimes increase or decrease 200-300 rpm then return to normal idling a few seconds later. Sometimes when the rpms dip down low enough, the engine sputters and either recovers or stalls. On most days I don't have any issues and the car runs fine. The check engine light sometimes comes on while this happens, and sometimes it doesn't.
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Since our weather has turned cold with lows just above 0ºF and highs around 10ºF, and we've had 9" of snow this week, I have been driving a seldom used 1994 LeSabre rather than my "nice" car, an '08 Grand Marquis. There's no point in exposing the newer car to salt and slick streets. At least the interstates are completely cleared off. The LeSabre runs great despite its 177K miles. The only issue I have with the Buick is that it has died repeatedly after a 20 mile run up or down the interstate. I lift my foot or tap the brake pedal to turn off the cruise control, and the engine dies. The first time it did it, I pulled over, stopped, put it in park and restarted it. Now that I know what it's doing, I keep rolling, put it in neutral, and restart it before getting to the bottom of the ramp. I does it ALMOST every time after a long 65 to 70 MPH run. It was not doing it the last time I drove it at more bearable temperatures, in the 40s or 50s so it may not be a problem next week. It does not seem to do it going from stop light to stop light, even at low temperatures. It has the 3.8 Liter V-6. Why it might be doing this?
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My 87 lesabre has run great for many years, but lately, it has been quitting on me. It happens randomly, usually while driving slower or idling. It just suddenly quits almost as if it's out of gas. It usually starts right back up, sometimes have to wait 20-30 seconds. It runs fine, not sluggish or anything, up until it quits. Had a couple mechanics look at it, when I told one about it he thought for sure it was going to be the fuel injectors but they all checked out fine.
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2007 Sonata V6 with 72K miles.
The car has developed a rough idle while in gear (i.e. when stopped at a stop light) and park (i.e. after I start the car).
It's starting to get a little annoying since I'm used to a very smooth idle.
I think this issue started within the last 2-3k miles.
Plugs were allegedly changed at 30k. A full tuneup was done at that time.
Wires are still original.
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Having problem with 2016 Accent Sport (or other model) idling rough after smooth driving for about 20 or so minutes? It has started doing this about a month after being purchased. About 700 miles or so on it) When in stick mode it smooths out and purrs like a kitten, but back in automatic mode it idles rough, with Active Eco on and off. I have an appointment to take it in to the dealership 5/7, but I wanted to see what the cause was.
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After I start my Lesabre when cold, after about 15 minutes or so it starts idling high, usually about 1500 , but sometimes it's as high as 2300 while stopped at a light. And a few times it has been 3-4000 rpm after putting it into PARK. After it starts idling high it starts shifting late. If you shut the engine off and immediately restart it, it usually starts idling fine again temporarily. Engine has normal power and runs smooth and idles smooth. It has also randomly died a couple times while driving at 30-40mph but then immediately restarted as if there was no problem.
It has a P0121 code which is "throttle position sensor switch A circuit range/performance problem". It also has a P0420, "Catalyst System Efficiency Below Threshold (Bank 1) ", which I'm not sure is related to the issue because the check engine light had been on a long time before the idling/shifting issue started happening. Like in the neighborhood of a year and a half before the current issue, but it ran fine the entire time and got 30+mpg on the highway.
First thing I did to troubleshoot was to test the TPS and it seemed ok. Voltmeter readings were .4v with throttle closed and seemed to advance smoothly up to 4.4v at WOT. But, I tested it before the engine was hot and I don't have a Oscope. I then used some carb cleaner and shot it around the injectors and a few vacuum inlets to check for vacuum leaks, to no effect. Engine runs quiet and I don't really hear any vac leaks.
Next, I cleaned the idle air control valve which was pretty dang dirty, but that didn't seem to resolve the issue, although it may have had a slight effect because the issue seems to come and go some while driving now, but I'm not totally sure. I also tested the connector at the IAC and had voltage on all 4 pins between .4v - 11.4v approximately.
Lastly, I got the engine to reproduce the problem and then pulled and then reconnected these sensors one at a time while the engine was idling high:
MAF Sensor
TPS
IAC
Intake Air Temp Sensor
This didn't have the slightest effect on the engine... I'm thinking it might actually be the TPS or IAC but I don't want to just start replacing stuff without knowing damn near certain it's going to resolve the issue. Could a vehicle speed sensor cause this? How I should proceed from here? :?
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I have a 1995 Buick Lesabre. The car jerks while I am driving or when idle as if it wants to shut off. Sometimes it jerks and then the check engine light comes on. When I described the problem to my mechanic he said that it might have been the fuel filter but then he said it might be an electrical problem. I would like to start with the fuel filter to see if that would work but I am not a mechanic nor am I an expert on cars nor do I want to spend tons of money on such an old car.
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2009 corolla le won't shift into park. Disconnected linkage and works good. Lever at trans moves smooth in every gear except park.
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The title says it all. I have no CEL.
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I have a 1991 Buick LeSabre, sometime last year the check engine light came on, and I took it into a mechanic who told me that a magnetic sensor on the timing gear broke off and that it is the problem with the car, but it would cost me 500 dollars to replace the part, because it is located in the engine. I noticed that the engine felt like it lost power, and the car started vibrating when I was idle. The beginning this year, I replaced the spark plug wires, and replaced the spark plugs, when I replaced the spark plug wires, I realized that two of the wires were broken, as soon as I was done.
I tested the car, and the power is back, but I still have the stalling problem. I will try to describe how the car stalls, I come to a stop, and when I push on the gas to accelerate, the car just conks out, so I have to restart the car, and rev it a little to keep it from conking out again, and it starts running normally. I have been told by another mechanic that I need to replace a Electronic Ignition Control module, which I can not find, and that it is possible the fuel is not getting into the chambers. I just want some answers to my problem, so the car will last me till I can get a new vehicle or something better.
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I have a 1997 LeSabre with 180000 miles. I can drive the car for 4-5 miles before it stalls and then dies. the car will start to idle fast, then bottom out a couple of times before it dies. It also makes a horrible noise under the hood and sounds like the rods are all clanging together. Once it dies, it will not restart until it has sat there for 30-40 minutes. After sitting for some time, it will crank right up and then repeat the process again. My oil pressure is off the chart high and it stays there all the time. Does this have something to do with the problem of is that another problem all together? What is causing my car to die like this and how do i fix it?
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I have a 2006 Ford 150 with about 120,000 miles on it... For almost 9 months now I've had a really rough idle and I can't seem to get it to smooth out. I've tried new plugs, tune up, new fuel filter, higher octane gas, fuel injector cleaner, octane booster, cleaned my mass air flow sensor and nothing works... I've checked the trucks ECM for any codes but it comes up clean every time...
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Got 10 gal. gas and pulled into drive-thru; idling in park, the engine stuttered once, then died. First retry it started, ran rough for 1 second and died; second retry i tapped repeatedly on gas and it ran VERY rough for 1 second and died, never to start again. It turns over fine. Where the fuel filter is to test pressure? BTW, it has nearly half million miles on it! 473k+
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My car recently started running overtemp not much, but enough to bother me. I flushed the system with no change. after about a week with continued symptoms, my trans started shifting hard between 1st to 2nd and 2nd to 3rd, and running rough in general, sputtering lightly in high gear. I assumed it was running over temp with the rest of the car, so I replaced the radiator and the radiator cap, yet still am having the same problem. Is it still related to the cooling system? if I replace the water pump will i solve my problems, or is it really a hidden trans problem? I'm fairly certain the trans has never been serviced, and I'm reluctant to do so given the high milage, 174,000. The fluid is full, but its very thin, and no longer red, its sort of a pale yellow.
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I have a 1994 V6 Chevrolet Camaro with ~197K miles. Recently I have noticed that after starting the engine it idles rougher than normal and also as I accelerate, especially between 45 and 65 mph. Several things have just been replaced and/or fixed: spark plugs, spark plug cables, oil, coil packs, water pump, & thermostat. I regularly use premium gasoline and when for some reason a lower octane is used I add an octane booster. Since this problem arose I tried a fuel system cleaner; it hasn't worked thus far. The last time something like this happened, I took my Camaro to a trusted repair shop and when being diagnosed its' cylinder chambers and many different lines flooded with fuel. After replacing the fuel regulator my car returned to normal.
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I have a 1988 Buick PA Electra. Car idles rough and shaky at a stop light. When warmed up service engine light comes on for a few seconds then goes off. I've changed ignition coil box, wires, plugs, ignition module, fuel injectors, fuel filter. It seems like there may be a vacuum leak. Car has only 114,000 miles on it and I don't want to give up on her. Before this she was running smooth.
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