1994 Olds 88 stalling - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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

Reply
 
 
 
Thread Tools Search this Thread
Old 08-15-2012, 01:43 PM   #1
Junior Member
Posts like a Ricer Type-R
Thread Starter
 
Join Date: Aug 2012
Posts: 16
Thanks: 0
Thanked 0 Times in 0 Posts
bigchieftaco is on a distinguished road
Default 1994 Olds 88 stalling

Hello everyone!
This issue has been driving me nuts lately! I really want this fixed before winter. My car'* engine will "bog" on occasion, usually when decelerating or accelerating from a slow speed. If I have my AC running, it will even die sometimes. It ONLY does it when I get below half tank of fuel.
I have searched the internet for hours and tried many things. No avail.
I tried to pull the codes but when I hooked up the meter it said it couldn't connect.

List of things I have done:
Cleaned MAF sensor
Changed fuel filter
Unplugged EGR valve

My dad thinks it might be the throttle positioning sensor but I think it'* something to do with the fuel tank or fuel pump because it only happens when I get below half tank.

What else should I try?
bigchieftaco is offline   Reply With Quote
Old 08-15-2012, 03:33 PM   #2
Senior Member

True Car Nut
 
2kg4u's Avatar
 
Join Date: Sep 2006
Location: Windsor, Ontario / Detroit, Michigan
Posts: 4,804
Thanked 220 Times in 181 Posts
2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of
Default

Pull the vacuum hose off the fuel pressure regulator and see if you smell gas in the hose.

Inspect top to bottom for vacuum leaks.
2kg4u is offline   Reply With Quote
Old 08-15-2012, 04:59 PM   #3
Junior Member
Posts like a Ricer Type-R
Thread Starter
 
Join Date: Aug 2012
Posts: 16
Thanks: 0
Thanked 0 Times in 0 Posts
bigchieftaco is on a distinguished road
Default

Quote:
Originally Posted by 2kg4u View Post
Pull the vacuum hose off the fuel pressure regulator and see if you smell gas in the hose.

Inspect top to bottom for vacuum leaks.
Sure thing, I'll check when I get off work. If I smell gas, does that mean I need a new fuel pressure regulator?
Sorry for dumb questions, I am not a mechanic. I am a computer nerd
bigchieftaco is offline   Reply With Quote
Old 08-15-2012, 05:43 PM   #4
Senior Member

True Car Nut
 
2kg4u's Avatar
 
Join Date: Sep 2006
Location: Windsor, Ontario / Detroit, Michigan
Posts: 4,804
Thanked 220 Times in 181 Posts
2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of
Default

Quote:
Originally Posted by bigchieftaco View Post
Sure thing, I'll check when I get off work. If I smell gas, does that mean I need a new fuel pressure regulator?
Sorry for dumb questions, I am not a mechanic. I am a computer nerd
You don't learn if you don't ask questions. Yes, if you smell gas in the vacuum line that feeds the FPR, you need a new FPR.
2kg4u is offline   Reply With Quote
Old 08-15-2012, 06:10 PM   #5
Junior Member
Posts like a Ricer Type-R
Thread Starter
 
Join Date: Aug 2012
Posts: 16
Thanks: 0
Thanked 0 Times in 0 Posts
bigchieftaco is on a distinguished road
Default

Also, any ideas why it only does it after I get below half tank?

Thanks for the help!
bigchieftaco is offline   Reply With Quote
Old 08-15-2012, 06:13 PM   #6
Senior Member

True Car Nut
 
2kg4u's Avatar
 
Join Date: Sep 2006
Location: Windsor, Ontario / Detroit, Michigan
Posts: 4,804
Thanked 220 Times in 181 Posts
2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of
Default

Quote:
Originally Posted by bigchieftaco View Post
Also, any ideas why it only does it after I get below half tank?

Thanks for the help!

I actually suspect your fuel pump is the culprit, but want to rule out some easy stuff first.
2kg4u is offline   Reply With Quote
Old 08-15-2012, 06:20 PM   #7
Junior Member
Posts like a Ricer Type-R
Thread Starter
 
Join Date: Aug 2012
Posts: 16
Thanks: 0
Thanked 0 Times in 0 Posts
bigchieftaco is on a distinguished road
Default

Quote:
Originally Posted by 2kg4u View Post
I actually suspect your fuel pump is the culprit, but want to rule out some easy stuff first.
Dang, I been thinking the same. I hope its not. What through me off though is that to me, if the fuel pump is going out it would always do it, not just below half tank. But then again, I don't understand how all that works.

Fingers crossed its the FPR.
bigchieftaco is offline   Reply With Quote
Old 08-15-2012, 08:11 PM   #8
Junior Member
Posts like a Ricer Type-R
Thread Starter
 
Join Date: Aug 2012
Posts: 16
Thanks: 0
Thanked 0 Times in 0 Posts
bigchieftaco is on a distinguished road
Default

Ok, so I checked the FPR vacuum line and it reeked of fuel. So, after looking at all the vacuum lines, I ran to the closest auto store and bought new vacuum lines. See pics.
These are the lines before I changed them.




The line going to the FPR I left because it was still in good shape and wasn't leaking. After replacing the vacuum lines, the car still stalls/bogs.

NOTE: I didn't know that my cruise control was hooked into these vacuum lines too. About a year ago, right when the stalling problem came up, my cruise control became "weak". If there is a hill, the car will slow down a lot but the CC stays on, just can't keep up. I have to assist it going up hills or sometimes just keeping my speed. I'm not sure if this is even remotely tied into this but after seeing the vacuum lines and how they connect, I thought I should share this info.

In conclusion, I think I need a new FPR.
Attached Thumbnails
1994 Olds 88 stalling-20120815172923664.jpg   1994 Olds 88 stalling-20120815172934695.jpg  
bigchieftaco is offline   Reply With Quote
Old 08-15-2012, 11:53 PM   #9
Senior Member
True Car Nut
 
rjolly87's Avatar
 
Join Date: Jun 2003
Location: Las Cruces, NM
Posts: 6,857
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

I have a similar issue as well. This generation of C/H bodies is known for breaking baffles in the gas tank. When I start getting low on gas (3/8 is the reliable magic number), the car will stall under heavy braking, or heavy turning (like a banked interchange). I believe this is the condition that affects my vehicle. My fuel gauge also moves around a lot as well.

The solution: I just keep it in mind, and try and refill when it starts getting near the quarter tank mark. The solution is to drop, and possibly replace the fuel tank, which is something I prefer to put off as long as possible. When the fuel pump dies, I will likely address it then. Make it a one stop tank drop.

You also indicated that your vacuum lines wreaked of fuel. That is a telltale sign of a bad fuel pressure regulator, and should be addressed in short order. This can directly cause fire, or even back fire (like manifold exploding goodness). The vacuum lines have seen better days, and are probably not helping either.
rjolly87 is offline   Reply With Quote
Old 08-16-2012, 12:14 AM   #10
Junior Member
Posts like a Ricer Type-R
Thread Starter
 
Join Date: Aug 2012
Posts: 16
Thanks: 0
Thanked 0 Times in 0 Posts
bigchieftaco is on a distinguished road
Default

Quote:
Originally Posted by rjolly87 View Post
I have a similar issue as well. This generation of C/H bodies is known for breaking baffles in the gas tank. When I start getting low on gas (3/8 is the reliable magic number), the car will stall under heavy braking, or heavy turning (like a banked interchange). I believe this is the condition that affects my vehicle. My fuel gauge also moves around a lot as well.

The solution: I just keep it in mind, and try and refill when it starts getting near the quarter tank mark. The solution is to drop, and possibly replace the fuel tank, which is something I prefer to put off as long as possible. When the fuel pump dies, I will likely address it then. Make it a one stop tank drop.

You also indicated that your vacuum lines wreaked of fuel. That is a telltale sign of a bad fuel pressure regulator, and should be addressed in short order. This can directly cause fire, or even back fire (like manifold exploding goodness). The vacuum lines have seen better days, and are probably not helping either.
Oh, yeah that sounds similar except my gas gauge doesn't move around a lot. If I am going to replace my FPR I sure hope that fixes it otherwise it is probably the gas tank solution you mentioned. I know it'* easy to just keep it above 1/4 tank, but come on, that'* annoying. Also, it was more of a hint of gas smell, not "OMG MY NOSE!!!" smell.
bigchieftaco is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
1994 Olds 88 stalling issue wgcdc Oldsmobile 13 04-09-2015 05:42 PM
1985 olds calais stalling dkisdatrump Oldsmobile 10 01-31-2015 10:15 PM
95 Olds 88, stalling out, sputtering. adamdavidson Oldsmobile 10 03-13-2014 09:46 PM
1994 Bonneville stalling issue. bf7931 1992-1999 4 01-11-2013 01:22 PM
1994 Olds LSS stalling randomly, P1406 code - !!Fixed!! EGR KneeHowMa 1992-1999 13 12-18-2006 06:31 PM


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 04:47 PM.


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.