No fuel pressure until cranking - Oldsmobile Forum - Oldsmobile Enthusiasts Forums

Alero Talk about the Oldsmobile Alero within...

Thread Tools Search this Thread
Old 10-10-2016, 09:41 AM
Junior Member
Thread Starter
Join Date: Oct 2016
Posts: 2
Default No fuel pressure until cranking

Hello. A newbie to this forum. Daughter has a 99 Alero, 2.4 liter. She started complaining of hard starting which I confirmed as having to crank the engine a long time for it to start. Otherwise it runs great. Within the last year I did (stupidly) put in a cheap fuel pump module.

According to what I have read, the computer is supposed to energize the fuel pump relay for 2 seconds upon turning the key on without cranking the engine to build fuel pressure. Her's does not do this. No fuel pressure until the engine starts cranking. The fuel pump does run for 2 seconds after the engine is shut off like the manual says it should, I can hear it. But fuel pressure drops to nothing within a couple seconds after that.

Do I have 2 issues here? Bad fuel pump module for the pressure drop? And would it be a computer problem if the pump doesn't run until cranking? Thanks in advance to any suggestions.
Reply With Quote
Old 10-17-2016, 01:58 PM
Senior Member
Join Date: Apr 2009
Location: WI
Posts: 156

I'd like to be of real help here, but know nothing of what you speak.

Having said that, in a very general sense, it sounds more like a fuel pump problem than a computer problem.

If it is a 99, it is OBDII compliant. Are you pulling any codes?
Reply With Quote

Related Topics
Thread Thread Starter Forum Replies Last Post
1968 Cutlass not getting fuel to fuel pump henryandrade1977 Cutlass 1 10-02-2011 11:52 AM
Slow cranking engine meanmagee Alero 1 08-09-2011 11:03 AM
Low Fuel Pressure MyGalRosie Eighty-Eight 1 02-18-2011 03:30 PM
fuel sending unit & fuel pump gwmats General Tech Help 0 08-22-2010 06:33 PM
low tire pressure light anchored General Tech Help 2 08-06-2005 04:51 PM

computer issue, fuel pressure, fuel pump, hard starting

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

Featured Sponsors
Vendor Directory

All times are GMT -5. The time now is 02:23 PM.

© 2018 MH Sub I, LLC dba Internet Brands
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 and affiliated sites.