I have a 2000 Buick Le Sabre 3.8 V6 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Buick When starting new posts, please specify YEAR, MAKE, MODEL, ENGINE type, and whatever modifications you have made.

Reply
 
 
 
Thread Tools Search this Thread
Old 06-01-2014, 02:07 PM   #1
Junior Member
Thread Starter
 
Join Date: Jun 2014
Posts: 2
Thanks: 0
Thanked 0 Times in 0 Posts
Voodoo_vkm is on a distinguished road
Default I have a 2000 Buick Le Sabre 3.8 V6

I recently replaced the upper intake manifold due to it exploding, after replacement, the car ran but would die within a few miles, I have also replaced tha IAT, MAP, and MAFS, but now the engine will start but die after a couple seconds. Does anyone have any suggestions for where to go next with it?
Voodoo_vkm is offline   Reply With Quote
Old 06-01-2014, 05:54 PM   #2
Senior Member
True Car Nut
 
rjolly87's Avatar
 
Join Date: Jun 2003
Location: Las Cruces, NM
Posts: 6,854
Thanked 298 Times in 246 Posts
rjolly87 has a brilliant futurerjolly87 has a brilliant futurerjolly87 has a brilliant futurerjolly87 has a brilliant futurerjolly87 has a brilliant futurerjolly87 has a brilliant futurerjolly87 has a brilliant futurerjolly87 has a brilliant futurerjolly87 has a brilliant futurerjolly87 has a brilliant futurerjolly87 has a brilliant future
Default

Did you address the likely cause of the explosion, the fuel pressure regulator? I would also check fuel pressure in general.
rjolly87 is offline   Reply With Quote
The Following User Says Thank You to rjolly87 For This Useful Post:
WilliamE (06-03-2014)
Old 06-01-2014, 11:05 PM   #3
Junior Member
Thread Starter
 
Join Date: Jun 2014
Posts: 2
Thanks: 0
Thanked 0 Times in 0 Posts
Voodoo_vkm is on a distinguished road
Default

fuel pressure is excellent, I was told it was a bad MAF sensor, which I have replaced
Voodoo_vkm is offline   Reply With Quote
Old 06-02-2014, 08:34 AM   #4
Senior Member
True Car Nut
 
jwfirebird's Avatar
 
Join Date: Dec 2009
Location: western,ny state
Posts: 9,616
Thanked 563 Times in 481 Posts
jwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond repute
Default

normally get codes for maf if its that. alot of times if you dont get codes it either the crank position sensor or icm. crank sensor is very common on that. see if you are getting spark when it dies
jwfirebird is offline   Reply With Quote
Old 06-02-2014, 12:36 PM   #5
Senior Member

Certified GM nut
 
Tech II's Avatar
 
Join Date: Feb 2014
Location: Worcester, Ma.
Posts: 2,142
Thanked 778 Times in 608 Posts
Tech II has a reputation beyond reputeTech II has a reputation beyond reputeTech II has a reputation beyond reputeTech II has a reputation beyond reputeTech II has a reputation beyond reputeTech II has a reputation beyond reputeTech II has a reputation beyond reputeTech II has a reputation beyond reputeTech II has a reputation beyond reputeTech II has a reputation beyond reputeTech II has a reputation beyond repute
Default

What do you mean by exploding?

There is a video where the f/p leaks fuel and is ignited by a hot engine.....

However, there is also the possibility of a bad cat......

I have seen customers drive their vehicles with a bad cat, the back pressure gets to a point where it can unseat the EGR valve and you have unregulated hot exhasut gases come into the plenum,,,,it gets so hot, it will blow a hole directly over the stove pipe(part that sticks up from the lower intake and can cause coolant leaks if it contacts the plenum), in the top of the plenum.....
Tech II is offline   Reply With Quote
The Following User Says Thank You to Tech II For This Useful Post:
WilliamE (06-03-2014)
Old 06-03-2014, 06:22 AM   #6
Senior Member

True Car Nut
 
WilliamE's Avatar
 
Join Date: Jun 2011
Location: VA
Posts: 3,087
Thanked 418 Times in 376 Posts
WilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond repute
Default

The fuel pressure may be fine, but normally a faulty fuel pressure regulator is at fault, if not that the o-rings on the fuel line at the back of the motor tend to leak after a while, I could see that starting a fire, not sure about an explosion though.

Is this how yours exploded?


Watch this video, at the 1:50 mark shows how to test for a ruptured diaphragm on a fuel pressure regulator.
WilliamE is offline   Reply With Quote
The Following 2 Users Say Thank You to WilliamE For This Useful Post:
75 racer (12-18-2014), damadtech (06-08-2014)
Old 06-08-2014, 11:02 AM   #7
Senior Member
Posts like a Supercharger
 
Join Date: May 2014
Posts: 162
Thanked 5 Times in 5 Posts
eb-86 is on a distinguished road
Default

I don't understand what the good situation ? if the fuel get out or not ?
eb-86 is offline   Reply With Quote
Old 06-08-2014, 04:03 PM   #8
Senior Member
True Car Nut
 
Soft Ride's Avatar
 
Join Date: Jan 2012
Location: BC Canada
Posts: 3,580
Thanked 335 Times in 298 Posts
Soft Ride has much to be proud ofSoft Ride has much to be proud ofSoft Ride has much to be proud ofSoft Ride has much to be proud ofSoft Ride has much to be proud ofSoft Ride has much to be proud ofSoft Ride has much to be proud ofSoft Ride has much to be proud of
Default

If the fuel is leaking out it is bad ...and needs immediate replacement.
Soft Ride is offline   Reply With Quote
Old 06-08-2014, 05:11 PM   #9
Senior Member

True Car Nut
 
WilliamE's Avatar
 
Join Date: Jun 2011
Location: VA
Posts: 3,087
Thanked 418 Times in 376 Posts
WilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond repute
Default

Quote:
Originally Posted by eb-86 View Post
I don't understand what the good situation ? if the fuel get out or not ?
There is no good situation that comes from a leaking fuel pressure regulator, for a possibility see the first video I posted with the upper intake exploding, that is one of the things that could happen, most of the time I believe it will just run a bit rough, plugs could become fouled.
Replacing the fuel pressure regulator would be much cheaper then dealing with what could happen.
WilliamE is offline   Reply With Quote
Old 12-18-2014, 01:01 AM   #10
Junior Member
Posts like a Ricer Type-R
 
Join Date: Nov 2013
Location: Midwest
Posts: 19
Thanked 2 Times in 2 Posts
MHunter is on a distinguished road
Default Exploding Plenum

This is caused by the fuel pressure regulator. I just replaced my plenum again because it exploded (photo 1). The first time I replaced it was because of a coolant leak (about a gallon a month). I will post a few photos. I had to replace the plenum, fuel rail, fpr and two injectors. The fuel rail because it was bent during the explosion (photo2) and injectors because they had cracked nozzles (photo3). When I pulled the old regulator out of the bent fuel rail it was full of contamination (photo4). If your car hesitates and kicks while you are accelerating uphill at 55-60 MPH it could be a sign of a bad fpr. I say this because my car did that before and since the repair it has stopped. If you have a bad fpr I would replace it right now. Also if you are doing this repair after the explosion, don't forget to look down in the holes on the LIM and check for shrapnel. Mine had several pieces of plastic in them. Instead of pulling the LIM and re-installing which was a pain in the back the first time I did it, I just modified my shop vac and sucked all the pieces out. I paid $25 for a fuel rail off of a Riviera and $15 a piece for the two injectors, they came off of a 2000 Bonneville. I figured a new fpr was the way to go which ran me $62 at my favorite parts store. I think the car is running better than it ever has for me.
Attached Thumbnails
I have a 2000 Buick Le Sabre 3.8 V6-20141125_151536.jpg   I have a 2000 Buick Le Sabre 3.8 V6-20141217_212724.jpg   I have a 2000 Buick Le Sabre 3.8 V6-20141217_212820.jpg   I have a 2000 Buick Le Sabre 3.8 V6-20141217_212744.jpg  
MHunter is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
1999 buick Le Sabre No Crank/ No Start kudzuinthesouth Buick 3 08-27-2011 07:49 PM
Teach me > 2000 Le Sabre BonneMeMN Buick 4 01-23-2007 06:02 PM
Bad seat heater 2000 Le Sabre BonneMeMN Buick 3 01-10-2007 07:12 PM
top speed in le sabre L27Buick Buick 5 03-23-2004 02:40 PM
1989 3.8 le sabre(prts car L27Buick Performance, Brainstorming & Tuning 2 05-24-2003 10:36 AM


Tags
buick lesabre, fuel deilivery, fuel pressure regulator, upper intake manifold

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 07:36 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.