misfire

Pretty much the title. I've also replaced the PCV valve & housing assembly that the MAP sensor plugs into and the MAF sensor, since I'm dumb and got the wrong part initially. I'm getting rough idle and misfires, loss of power while moving due to this code. From what I can tell, the next step...

I have a 2006 Buick LaCrosse CX 3.8L. I recently did a tune up on it, including changed all spark plugs and wires, and coil packs as well. Now for some reason that I can't figure out for the life of me it only is only running on 2 cylinders. The OBD2 says "random misfire. I know, common sense...

I have a 2000 Century that drives perfectly fine in town and during short drives. Occasionally, I have to take it on two hour drives. During those drives, sometimes (maybe 25-50% of the time), I'll be cruising at 75 mph on the interstate, and the car will begin misfiring and lose most of its...

Alright, I've run in to an issue and am looking for where to go next. My kids car had a misfire at 160k so I swapped out the plugs, plug wires and coils (all OEM). The car ran fine for a week and started running like crap yesterday. I went out and checked it with a scan tool, p0300 with...

I am trying to fix my son's 2000 LaSabre, 3.8L, 106K miles. I am getting the dreaded P0300 (Random/Multiple Cylinder Misfire) . Here is what I have done to date. 1 coil test was borderline on the bad side - replaced all 3, EGR would not read correctly - replaced, replaced all plugs & original...

Hi everyone, I am at a loss with this car and need some help. Recently on the highway I got a steady check engine light. When I got home and scanned it I found P0300 and P0137. So I started running down the list of things that it could possibly be, I swapped coils, changed the wires and...

So I've got a 1994 Roadmaster Wagon which has been acting up in the last few weeks. I'm not sure if it's a misfire or what. A few months ago (about 10k miles ago) it was also having a pretty severe misfire. I took it to a mechanic who replaced the distributor and the spark plugs. After he did...

I put 87 in by accident a week after purchasing this 98 Buick park Ave ultra with a very pleasing supercharger, and I've been told it reguires 91. The day after it started missing and has ran like that for the past few days, it also is making an almost knocking sound. I placed my hand on this...

my transmission has a hard shift sometimes , I found a misfire code on a coil yet it never turned on the engine check light and never jerked engine also , so should I replace the coil any way another thing and I wondered if the wire harness was needed to be cleaned but where is it that...

So my sister was given a free 96 Park Avenue by my aunt.... It had been sitting for 3 years or so I believe, but it started up fine. Anyways, we drove it a bit, and it started losing power, (I wasn't driving it myself, so I can't be certain of exact behavior) we pulled into a parking lot...

I have a 97 park ave (not ultra). I have dealt with the hydro lock in the past. So I got that out of the way. A few days ago I went to start the car. It almost started but I slipped off the key. I then started it again. It started running real rough and acting like it was misfiring...

I recently bought a 2011 Buick Regal CXL with the 2.4 ecotec non-turbo (65k miles). I've driven it for about 5k miles and have started noticing a hesitation (misfire) at idle when the car is in drive (it would kind of rock the car). It happens seemingly randomly and at varying degrees of...

I'm going to replace intake manifold gaskets, both lower an upper (lower is leaking, can see coolant around). My questions are concerning the procedure for changing the oil etc. Shall I drain the oil before the job and fill up after everything is place? I don't get why people recommend...

My Buick is running rough. Parked it in the summer. At that time code DTC 0128 and DTC 0P300. The car sat until a few days ago. Replaced the spark plugs. No change. Still running rough. Yesterday code DTC 0128 and DTC 0P300 Any suggestions on how to fix the random misfire? Help! Dave

My 2000 LeSabre was throwing the following codes: P0300 - Random Multiple Misfire P0102 - MAF signal low The car was also showing the following symptoms: At first - car would misfire and buck/hesitate when engine was warmed up After a few weeks - car constantly misfired (felt like only one...

I'm the proud owner of a 1999 Buick Riviera, Silver Arrow Edition. I've been having a couple things go out on it recently but the one thing i can't seem to fix is a misfire I've had for some time now. It was back in april after a large rain and i drove through a fairly large puddle. Ever since...

I have an odd problem with the traction control on my 1999 Buick Regal LS. When ever im driving and the traction controls kicks in for any reason the car shakes sounds like the engine is miss firing or almost even like it's being deprived of gas. The car has no warning lights in the dash, and...

A few weeks ago my 1988 LeSabre 3800 began to run rough/misfire intermittently. One minute its running smooth as silk, the next its chugging and shaking like crazy. I checked for ignition problems, all cylinders checked out fine for spark regardless of how the engine was running. I listened to...

So, as some of you know... I have a "Lemon"! I have picked up a OBD2 scanner and the Torque app in hopes that I can snag some real time fault codes. I have constantly received the same fault code 4 times in a row... when I requested a DVR for my car I was told by GM that the DVR's would not...

I have a 2006 Buick Lucerne CXS with the Northstar V8. I have been chasing a misfire for a while now. I am hesitant to make repairs ($$$)as it has 116xxx miles and needs front end work as well. First I had a p0305 code, misfire on cylinder 5. I was debating changing the coil on #5. Insetead I...