3800 series ii

Hi, all I recently had the upper plenum replaced at a shop and the tech told me he cleaned the throttlebody from carbon as well. After getting it back now every time the car starts up warm I hear this squeak. I also hear it when driving down the road and RPMs come down from about 2000 to 1400...

I picked up my second Buick yesterday. It was both the worst and best decision. I knew it had electrical problems, but I refuse to get down and dirty because I’ve already seen and killed two Black Widows (male and female). The Regal had been sitting for over a year, and I bought it for the...

Hi guys, I'm completely new to this forum and a new car owner. I admittedly don't know anything about cars but I just received a 2003 Park Avenue Ultra with 55K Miles and it's running great so far. However, I have read and heard that as great as the engine is, there are things that need to be...

I had a decent coolant leak, and the mechanic said the plastic elbows were urgent, but the upper intake manifold gasket and valve cover gaskets also had leaks. I can't remember if he mentioned about the lower intake manifold gasket or not. I had him do the aluminum elbows and I wanted to do some...

05 LeSabre Custom, I've posted about her in the past. I've been having an issue since October with starting the car. Between Oct and Dec, she would typically not turn over, but the radio, A/C, dash lights, etc all came on. No ticking noise or anything while attempting to turn over. I thought it...

I have a 1999 Buick park ave ultra with the sc 3.8 and my power steering has been finding every reason to leak on me and I can’t afford to fix it rn, so I’m wanting to put a belt on that doesn’t include the power steering pulley and the AC compressor since it’s also a bit chilly out and I’m not...

Rat droppings found on engine, 05 LeSabre started sputtering and vibrating while driving then it stalled. Most likely engine is misfiring (unsure which cylinder because I don't have my scan tool on me atm) since the CEL was blinking. Engine turns over fine, but won't stay running. Also noticed...

Ok here is some backstory if it can be relevant: I bought this 2003 LeSabre from an auction about 7 weeks ago, its my first LeSabre so everything's new to me. The motor was coated in oil with small pools in the space between the plenum and front valve cover. There was chocolate milkshake on the...

I would like to start by saying....yes I've taken it to a shop....with that being said...they say my intake gaskets need replaced. Now this code has been on here for 2 years (comes and goes). I've noticed no change in performance along with no noises or leaks. It started around 98,000 miles...

I have a 98 lesabre with 65,000 on it. 3800 series II Had LIM issue two years ago I know that is always important to mention, fixed with felpro aluminum gaskets. Replaced leaky sending unit with ac delco and changed oil with synthetic 10-30 and Lucas synthetic stabilizer, guage now shows...

I'm aware that most 3800s Series II (L36) have warping issues on the upper intake manifold. A TSB was published in 2003/2004 identifying this problem. There were a few threads here and there asking this question, but they're old. I was wondering if someone had updated info. In addition to the...

This is not a starter or slow turning over problem. Its fuel, spark, or air related. I bought this car after it had been sitting unused for over half a year “AS IS” 2001 LeSabre Custom with 98k miles. Sometimes the car starts instantly. Sometimes it cranks and cranks while trying to fire up for...

I have a 98 LeSabre and it has a bad rattle in the rear bank of cylinders. I think it is probably cylinder 6. I have oil consumption, as well as plug fouling in 6. I think it may be something to do with my valve guides allowing the valvestem to move side to side and make noise, as well as let...

I have a 98 LeSabre and it has a bad rattle in the rear bank of cylinders. I think it is probably cylinder 6. I have oil consumption, as well as plug fouling in 6. I think it may be something to do with my valve guides allowing the valvestem to move side to side and make noise, as well as let...

Ok so I have a P0420, P0442, and a P0303 code on my 2003 Buick LeSabre (3800 series 2 engine) And I think they are all related to one another...I've done lots of research and somebody said that one of the possible causes of the misfire on cylinder 3 (P0303 code) could be caused by a evap system...

Hello, new here and seeking some help. This is going to be long so that maybe I've done something unknowingly has caused the problem. Here goes, replaced lower and upper intake gaskets in my '97 Lesabre, 3800 Series II. All went well, sort of. Forgot to put the hard plastic tube in the upper...

I have a 1989 Buick Electra park avenue it's fwd. The motor is toast. I was wondering if I could swap out the 3800 series1 the vin "c" with the 2nd 3800 series possibly supercharged. How frustrating would it be? Would the existing Wire harness work? Would it Bolt up to the trany (auto). And...

I live in travis county,aka Austin texas and i can't seem to pass the emissions test for inspection.I believe one is a short circuit in the purge valve.Im just gonna go ahead and buy a new one.Another problem is ,as you can see..i have a vacuum leak that is attached to the fuel rail.Idk where i...

I have a 1999 Buick Regal GS supercharged with a 3800 series II L67 motor. It is completely stock. It has started knocking real lightly. It is coming from the left side of the engine where the pulleys are at. The knocking is not sequential but it is constant. The motor runs fine and the...

So I bought a '95 Buick Riviera a few months ago, it has 170,000 miles on the body, and a new 3800 series 2 was put in with only 100,000 miles on it. Got the car for a great deal and thought it would last me a while with Buick reliabiltitty. How ever, ever since I bought it, every once in a...