1990 Buick LeSabre Questions

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I have changed the ecm, crank sensor, temp control, ignition coil, coil pack, thermostst, battery, cables, but the problem still persists also had the plugs and wires change there is no specific time it happens but after it stalls it usually starts back up but sometimes it takes a few minutes for it to restart i'm almost at my wits end but I won't give up cause I really like the car so I want to get it fixed it has been tested and retested for everything but it won't stall when it's at the mechanics HELP! !!

Car will start up with no problems, I will drive it around for a bit a shut it off. Will start up or will not start,when it doesn't start it will turn over but wont fire, or will start for a few seconds, but will sound like its misfiring or runs like hell and shuts off. If you let the car sit for half an hour to an hour it will fire up like nothing happened and the motor runs fine.

they seem to doing the job but at some point they need to be replaced or how do you check them to see if there time has come. 98,000 on the vehicle. thanks

The check engine light came on showing dtc65. I looked it up and it said "Right bank O2 sensor rich exhaust indicated" Have any what that means? Thanks.

My gas gauge was working fine. I went in to fill up my car and after I was done the gauge only read a half a tank. I know the car is full of gas. Do you have any ideas what it could be? Thanks.

My car has 98,000 miles and the fluid on the stick looks fine. It shifts like new but what about the age on the fluid. Does it break down over the years? I don't think its ever been changed. Thanks.

I am replacing my front brakes and rotors and need to know what size of wrench I need so I can purchase it when I get my parts. Thanks.

buick lesabre

The noise sounds like it may be coming from the rear, almost like the parking brake is stuck but I don't believe it is. I thought maybe it was a wheel bearing but it doesn't seem to do it in neutral rolling down a hill and I'm pretty sure it's in the rear, and not coming from the transmission/engine. It's actually a 1986 lesabre thanks for your help

the car idles fine. it does this whether the engine is warm or cold and only lasts a minute or two. dtc 41. thanks

the camshaft sensor and EGR valve have been replaced.

I came to a red light and stoped and tried to go again n it would not move i tried all gears n the only one that worked was reverse it showed no other signs before that i was going to break down idk whats wrong.

I have to go back to neutral and then drive to get it back in gear

It's actualy a 1988 model. The list didn't have that choice.
The wiring harness is made by Precision.
I've got 4 wires. 2 for the pump and 2 for the fuel gauge. I know which wires go where on the pump and on the fuel lever sender. Which slots do I put the wires in on the 4 wire plug?

It also looks like 1 of the wires in the 4 wire plug isn't going to connect to anything. What's up with that?

my car wont start up