my car wont start sometimes - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Everything Electrical & Electronic Have an electrical problem? Lighting, Alternators, gauges, DIC, HUD, etc? Post it here. Please post Audio problems in the Audio forum, and Engine control problems in the appropriate Mechanical forum for your year.

Reply
 
 
 
Thread Tools Search this Thread
Old 10-06-2007, 12:24 PM   #1
Senior Member
Posts like a Turbo
Thread Starter
 
Join Date: Jun 2006
Location: Yreka CA
Posts: 212
Thanks: 0
Thanked 0 Times in 0 Posts
mcsslover1987 is on a distinguished road
Default my car wont start sometimes

My car is at it again. I'll go out in the morning to start my car and it wont start. All I hear is the fuel pump relay clicking really fast and my engine turning over but not starting. I thought it was the fuel pump relay but I have a new spare and and put that into it and still the same thing. Then I'll go out an hour later and it'll start right up like nothing happened. Could there be a short someplace causing the relay to click or is there another relay or bad connection somelpace else?? Did it to me twice this week. I'm ready to push my car off a cliff if it keeps up.
mcsslover1987 is offline   Reply With Quote
Old 10-07-2007, 10:28 PM   #2
Senior Member
Certified GM nut
 
Join Date: Oct 2005
Location: Western New York
Posts: 1,942
Thanks: 0
Thanked 0 Times in 0 Posts
Technical Ted is on a distinguished road
Default

Let'* start by cleaning the ole battery cables. Remove the bolts & rubber boots to see the corrosion. Clean with sandpaper or wire brush & coat with dielectric grease before reassembling. Are you certain it'* the fuel pump relay that'* clicking? Is it clicking when the key is turned to the run position or start position?
Technical Ted is offline   Reply With Quote
Old 10-10-2007, 12:35 AM   #3
Senior Member
Posts like a Turbo
Thread Starter
 
Join Date: Jun 2006
Location: Yreka CA
Posts: 212
Thanks: 0
Thanked 0 Times in 0 Posts
mcsslover1987 is on a distinguished road
Default

Ted, my battery terminals are clean and my engine cranks over just fine. Yes its the fuel pump relay thats clicking becasue when I take it out it stops clicking. I have new spare and I put that one in also and it still ckicks. It clicks when I have it in the run and start position. I got home last night fomr work and the stinking thing started right up. I went out this morning and it did it again. Very very frustrating. Next car I buy its going to be an old one without all this electronic bullcrap!!
Something else has to be causing the relay to do that. I'm NOT convinced that its the relay failing. There has to be a short someplace.
mcsslover1987 is offline   Reply With Quote
Old 10-10-2007, 09:21 AM   #4
DINOSAURUS BOOSTUS

Expert Gearhead
 
BillBoost37's Avatar
 
Join Date: Mar 2005
Location: Enfield, CT
Posts: 41,391
Thanks: 0
Thanked 0 Times in 0 Posts
BillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of light
Default

The relay continually clicking would mean that it'* losing either it'* power or ground to engage the relay contacts.
BillBoost37 is offline   Reply With Quote
Old 10-10-2007, 11:25 AM   #5
Senior Member
Posts like a Turbo
Thread Starter
 
Join Date: Jun 2006
Location: Yreka CA
Posts: 212
Thanks: 0
Thanked 0 Times in 0 Posts
mcsslover1987 is on a distinguished road
Default

Ok so is there a ground somewhere between the fuel pump and the relay I could check?
mcsslover1987 is offline   Reply With Quote
Old 10-10-2007, 11:47 AM   #6
DINOSAURUS BOOSTUS

Expert Gearhead
 
BillBoost37's Avatar
 
Join Date: Mar 2005
Location: Enfield, CT
Posts: 41,391
Thanks: 0
Thanked 0 Times in 0 Posts
BillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of light
Default

The relay should be relaying power to the pump. If it'* clicking it'* either low on power to hold the relay or something else is wrong on the way to the relay. Not between the relay and the pump.
BillBoost37 is offline   Reply With Quote
Old 10-10-2007, 09:12 PM   #7
Senior Member
Posts like a Turbo
Thread Starter
 
Join Date: Jun 2006
Location: Yreka CA
Posts: 212
Thanks: 0
Thanked 0 Times in 0 Posts
mcsslover1987 is on a distinguished road
Default

Ok so now where is the grounding point before the relay then?? I just went out and my car started right up but its the warmest part of the day. (around 60 deg.) I know when I go out tomorrow morning it wont start.
mcsslover1987 is offline   Reply With Quote
Old 10-10-2007, 11:19 PM   #8
Senior Member
Certified GM nut
 
Join Date: Oct 2005
Location: Western New York
Posts: 1,942
Thanks: 0
Thanked 0 Times in 0 Posts
Technical Ted is on a distinguished road
Default

The fuel pump relay is energized by the PCM & grounds (G102) to the fender near the battery. When the key is turned to the run position the relay is energized just for 2 seconds. If the relay clicks for more than 2 seconds when the key is left in the run position that should rule out the ground.

Edit - The ground location is from the 99 shop manual. I don't know for sure if it was the same for the 96'*.
Technical Ted is offline   Reply With Quote
Old 10-10-2007, 11:36 PM   #9
Senior Member
Posts like a Turbo
Thread Starter
 
Join Date: Jun 2006
Location: Yreka CA
Posts: 212
Thanks: 0
Thanked 0 Times in 0 Posts
mcsslover1987 is on a distinguished road
Default

Figures. When I turn the key on, the relay keeps clicking as long as I have it on. So its not a grounding problem then? I really DONT want to take it to the GM dealer here in town. They are worthless here. I do have an appointment set up for Friday because there arent any other shops around here that deal with sofisticated electronics as what our cars have.
mcsslover1987 is offline   Reply With Quote
Old 10-10-2007, 11:44 PM   #10
Senior Member
Certified GM nut
 
Join Date: Oct 2005
Location: Western New York
Posts: 1,942
Thanks: 0
Thanked 0 Times in 0 Posts
Technical Ted is on a distinguished road
Default

Did you remove the rubber boots when you checked the battery cables?
It'* possible that you have a bad computer, have you checked for codes?
Technical Ted is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
94 Pontiac Bonneville rolls but wont start (sometimes) JammieM 1992-1999 1 03-09-2009 10:45 PM
1994 bonneville-wont start, wont run backwoodsfab 1992-1999 0 10-09-2008 07:27 PM
sometimes you feel like a n00b, sometimes you dont toastedoats General GM Chat 13 05-15-2005 02:20 AM
Car won't start... sometimes Teuobk 1992-1999 30 10-04-2003 12:56 AM
Over Drive....sometimes yes, sometimes no Tamara 1992-1999 6 02-04-2003 09:42 AM


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 09:39 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.