Automotive Forums .com - the leading automotive community online! Automotive Forums .com - the leading automotive community online!
Automotive Forums .com - the leading automotive community online! 
-
Latest | 0 Rplys
Go Back   Automotive Forums .com Car Chat > Pontiac > Trans Sport
Register FAQ Community Arcade Calendar
Reply Show Printable Version Show Printable Version | Email this Page Email this Page | Subscription Subscribe to this Thread
 
Thread Tools
Old 07-23-2010, 07:33 PM   #1
junk_yard_dog
AF Newbie
 
Join Date: Jul 2010
Location: creston, Ohio
Posts: 2
Thanks: 0
Thanked 0 Times in 0 Posts
Unhappy 1995 3800 fuel pump problem

I have a 95 transport with 3800 engine. I've had this for about 1 year and have had fuel pump problems before. about 3 months ago the fuel pump refused to prime so i suspected a broken 18ga. wire leading to the relay. So i spliced in a new relay from the yard. Worked fine up until 1 week ago. Just died while driving. Towed home, the next day it started without me doing anything to it. just turned the key. Idled for 10 min and ran thru the test drive. Died while trying to get to work less than 10mi away. I tried a new relay top and spliced in another, to no avail. 3 wires tested at 20-25 volts with key on, 2 wires were dead (grey & red) I'm guessing because i had the relay top off when I tested. Ran this morning for 3minutes or so (just turned the key). When the fuel pump primed this morning it sounded weak electrically speaking. I dropped the tank and tested the pump, test fine. wire harness under the drivers seat is okay to. CEL has been on since i bought the thing, shop said egr valve is lighting up the bulb. I'm not sure what else would keep the fuel pump from priming besides the relay. Is there a sensor that the computer looks for ?

Thanks in advance for the help.
junk_yard_dog is offline   Reply With Quote
Old 07-23-2010, 08:52 PM   #2
junk_yard_dog
AF Newbie
Thread starter
 
Join Date: Jul 2010
Location: creston, Ohio
Posts: 2
Thanks: 0
Thanked 0 Times in 0 Posts
Re: 1995 3800 fuel pump problem

FYI i did check the 20 amp fuse associated with the fuel pump located next to the relay. And there is power going to it.
junk_yard_dog is offline   Reply With Quote
Old 07-24-2010, 01:01 PM   #3
Jrs3800
AF Enthusiast
 
Join Date: Aug 2004
Location: Space Coast, Florida
Posts: 1,281
Thanks: 0
Thanked 32 Times in 32 Posts
Re: 1995 3800 fuel pump problem

You might have a PCM failure....

Does the van just shut off like it was turned off? Not like it was stumbling? Say it would be idling and all of the sudden its just dead? Also scan the PCM if you can and look for a code 1361

If you work in a junk yard and they allow it, just get a PCM from a 94-95 3800 H or C Body( LeSabre, Park Ave, Olds 88, Olds 98 or Bonneville ).... also any 94-95 3800 Olds, chevy or pontiac van... All of these will have the same PCM, all you will need to do is swap out the EPROM...
Jrs3800 is offline   Reply With Quote
 
Reply

POST REPLY TO THIS THREAD

Go Back   Automotive Forums .com Car Chat > Pontiac > Trans Sport


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



All times are GMT -5. The time now is 12:42 AM.

Community Participation Guidelines | How to use your User Control Panel

Powered by: vBulletin | Copyright Jelsoft Enterprises Ltd.
 
 
no new posts