03 Impala 3.4 Have to press gas to start - Chevy Impala Forums

It appears you have not yet registered with our community. To register please click here...

Chevy Impala Forums

Go Back   Chevy Impala Forums > Performance and Technical > Chevy Impala 7th Gen Discussion

Chevy Impala 7th Gen Discussion W-Body 2000-2005. Discuss all Chevy Impala 7th Generation Performance and Technical Discussion here.

Reply
 
LinkBack Thread Tools Display Modes
Old 05-08-2012, 05:43 AM   #1 (permalink)
Junior Member
 
Stellgod's Avatar
 
Join Date: May 2012
Posts: 13
Thanks: 0
Thanked 0 Times in 0 Posts
03 Impala 3.4 Have to press gas to start

Alright guys, I'm about done with this Impala. It's my wife's mail car, and is currently sitting at 160k miles.

Here's the problem:
She was finishing her route when she had to stop and deliver a package, turned off car, came back and wouldn't start. We could give it gas and it would start, and keep running as long as the gas pedal was pressed, however, once the gas was released the car would die. She's had an ongoing issue of this car dying, ESPECIALLY, if coming to a red light/stop. If you pull over, the car will start right up.

When I got it home, I turned the car off, and waited about 10-20 minutes, and I couldn't get it to crank without pressing the gas. I opened the hood, and the only visible thing I could see was a loose belt tensioner, but that wouldn't cause this problem, and I don't have a battery light on. After another hour or 2, and the engine has cooled down. The car fires right up without any problem.

So, what do you think? I'm leaning toward the 24x Crankshaft sensor. I've checked the FPR, and it's not leaking, within last 6 months cleaned the TB and the MAF. I had a misfire code about 3 months ago also, noticed one of the plug wires was cut, and replaced all of them. Apparently, gas got down into the cat though and ruined it, so I had to replace it also.

Any help would be greatly appreciated :-/

Stellgod is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 05-08-2012, 06:48 AM   #2 (permalink)
Junior Member
 
Stellgod's Avatar
 
Join Date: May 2012
Posts: 13
Thanks: 0
Thanked 0 Times in 0 Posts
Also, I'll add vacuum and fuel pressure checked out fine.

No codes, no security lights.

Stellgod is offline   Reply With Quote Quick reply to this message
Old 05-08-2012, 07:47 AM   #3 (permalink)
TSS
Administrator

 
TSS's Avatar
 
Join Date: Mar 2010
Location: Michigan
Posts: 8,988
Thanks: 624
Thanked 1,040 Times in 565 Posts
Before I even finished, I was thinking crankshaft position sensor when you mentioned the ongoing stalling problem. I don't know if that is related to the "gas" pedal issue or not, but I might start there (CPS).

__________________
2009 Impala SS (sold 3/2012);
2010 Buick Enclave CXL;
2010 Lincoln MKS AWD Twin Turbo, Livernois Motor Sports tuned, K&N Typhoon CAI, 0-60 in 4.20 seconds , 1/4 mile 12.80 @ 104 MPH



"Trying Times Are Not a Good Time To Quit Trying"
TSS is offline   Reply With Quote Quick reply to this message
Old 05-08-2012, 07:55 AM   #4 (permalink)
Junior Member
 
Stellgod's Avatar
 
Join Date: May 2012
Posts: 13
Thanks: 0
Thanked 0 Times in 0 Posts
I've got the car in a shop now, and he's had it for 3 days, can't reproduce it, and checks out fine on his computer. He's going to charge $120 to change the crank sensor for me, and I guess I'll see how it goes after that.

The only thing I can think of after that is the MAF sensor.

Stellgod is offline   Reply With Quote Quick reply to this message
Old 05-08-2012, 08:18 AM   #5 (permalink)
8th Gen Antagonist
 
kingnutin's Avatar
 
Join Date: Mar 2009
Location: Vancouver , WA
Posts: 13,656
Thanks: 516
Thanked 1,192 Times in 788 Posts
When you say it won't even crank without pressing the gas, do you really mean the engine won't turn without pressing the accelerator? Cause that makes no sense at all... I can't think of a thing that would cause that. Now if you mean that it won't fire without pressing the gas, that opens up the possibilities. Still lean towards the CPS, if you're already doing it, let us know how it turns out.

__________________
1978 Caprice Classic Landau
350 2-bolt, stock 4bbl
Stock rebuilt TH350
Edelbrock performer cam + intake
Dual 2 1/2" Flowmaster exhuast (waiting to be installed)
Edelbrock IAS Classic shocks
95 9C1 3.08 posi
4 wheel disc brakes!
16x8 American Racing Baja's with 225/60/16 Pirelli P4's

kingnutin is offline   Reply With Quote Quick reply to this message
Old 05-08-2012, 09:30 AM   #6 (permalink)
Junior Member
 
Stellgod's Avatar
 
Join Date: May 2012
Posts: 13
Thanks: 0
Thanked 0 Times in 0 Posts
Yep, that's what I mean, it'll turn and turn, but it won't actually fire up. I can give it some gas/open the throttle a bit and it'll start right up. Let off the gas, and it'll die.

He said he'll have it done today, and he'll only charge me $120 to do it, which I thought was a steal. My wife works again on Friday, I'll post something that evening or weekend and let everyone know.

Stellgod is offline   Reply With Quote Quick reply to this message
Old 05-08-2012, 12:55 PM   #7 (permalink)
Senior Member
 
00impala123's Avatar
 
Join Date: Feb 2011
Location: New Lenox IL/Bloomington IL
Posts: 784
Thanks: 1
Thanked 5 Times in 4 Posts
Sounds like the crank sensor to me as well. Replaced mine last year..or maybe two years ago lol. I had same problems
00impala123 is offline   Reply With Quote Quick reply to this message
Old 05-10-2012, 01:22 PM   #8 (permalink)
Junior Member
 
Stellgod's Avatar
 
Join Date: May 2012
Posts: 13
Thanks: 0
Thanked 0 Times in 0 Posts
Well, it didn't fix my problem. Wife finished her route, came home, let the car sit for an hour or so, and took it out to get the kids. Within about 5 miles, when pulling up to a red light, the car dies. She tried to crank it for a little while, and it wouldn't start without giving it gas. So she sat, without trying to crank for 10 minutes and let the engine cool a bit, and it fired right up.

Stellgod is offline   Reply With Quote Quick reply to this message
Old 05-10-2012, 01:49 PM   #9 (permalink)
8th Gen Antagonist
 
kingnutin's Avatar
 
Join Date: Mar 2009
Location: Vancouver , WA
Posts: 13,656
Thanks: 516
Thanked 1,192 Times in 788 Posts
I'm gonna guess ignition control module, unfortunately they can be difficult to test since they only fail when hot. Try checking for spark when its acting up.

__________________
1978 Caprice Classic Landau
350 2-bolt, stock 4bbl
Stock rebuilt TH350
Edelbrock performer cam + intake
Dual 2 1/2" Flowmaster exhuast (waiting to be installed)
Edelbrock IAS Classic shocks
95 9C1 3.08 posi
4 wheel disc brakes!
16x8 American Racing Baja's with 225/60/16 Pirelli P4's

kingnutin is offline   Reply With Quote Quick reply to this message
Old 05-14-2012, 09:48 AM   #10 (permalink)
Junior Member
 
Stellgod's Avatar
 
Join Date: May 2012
Posts: 13
Thanks: 0
Thanked 0 Times in 0 Posts
I hate throwing parts at it, but I just changed the ICM because I can't get a good reading off of it. I'll update in a couple of days to see if that fixes.

Stellgod is offline   Reply With Quote Quick reply to this message
Old 05-14-2012, 12:55 PM   #11 (permalink)
8th Gen Antagonist
 
kingnutin's Avatar
 
Join Date: Mar 2009
Location: Vancouver , WA
Posts: 13,656
Thanks: 516
Thanked 1,192 Times in 788 Posts
Fingers crossed!

__________________
1978 Caprice Classic Landau
350 2-bolt, stock 4bbl
Stock rebuilt TH350
Edelbrock performer cam + intake
Dual 2 1/2" Flowmaster exhuast (waiting to be installed)
Edelbrock IAS Classic shocks
95 9C1 3.08 posi
4 wheel disc brakes!
16x8 American Racing Baja's with 225/60/16 Pirelli P4's

kingnutin is offline   Reply With Quote Quick reply to this message
Old 05-14-2012, 01:32 PM   #12 (permalink)
Senior Member
 
00impala123's Avatar
 
Join Date: Feb 2011
Location: New Lenox IL/Bloomington IL
Posts: 784
Thanks: 1
Thanked 5 Times in 4 Posts
Did you do a CASE learn after the crank sensor was installed? Because you need to or it wont be fixed.
00impala123 is offline   Reply With Quote Quick reply to this message
Old 05-15-2012, 05:47 AM   #13 (permalink)
Junior Member
 
Stellgod's Avatar
 
Join Date: May 2012
Posts: 13
Thanks: 0
Thanked 0 Times in 0 Posts
No idea on the relearn, my wife is out on her route today. If there's still a problem, I'll make sure to ask the mechanic who changed it. Anyone got a working Tech II they want to give away for free? :-)

Stellgod is offline   Reply With Quote Quick reply to this message
Old 05-15-2012, 10:36 AM   #14 (permalink)
Junior Member
 
Stellgod's Avatar
 
Join Date: May 2012
Posts: 13
Thanks: 0
Thanked 0 Times in 0 Posts
ICM didn't fix the problem. I asked the guy who replaced the Crank sensor if he did a Crank Angle Sensor Error (CASE) relearn, and he had no idea what I was talking about or that he'd ever had to do it before. I asked if he had a tech II, and we could do it. He said yah, and went and grabbed an OBD II. I let him figure out that thing wouldn't do it. He's going to call the dealership and find out what that is, and give me a call back.

Sigh...I can't blame the mechanic honestly. He's a super nice guy, and he's not charging me for the stuff that doesn't fix it.

Stellgod is offline   Reply With Quote Quick reply to this message
Old 05-15-2012, 10:44 AM   #15 (permalink)
Senior Member
 
00impala123's Avatar
 
Join Date: Feb 2011
Location: New Lenox IL/Bloomington IL
Posts: 784
Thanks: 1
Thanked 5 Times in 4 Posts
Yeah, that might be your problem lol
I did my CASE relearn with my aeroforce gauge..that thing is worth the $
00impala123 is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply


Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Chevy Impala Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Display Modes

Posting Rules
You may post new threads
You may 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 On
Pingbacks are On
Refbacks are On


LinkBacks (?)
LinkBack to this Thread: http://www.impalaforums.com/chevy-impala-7th-gen-discussion/322516-03-impala-3-4-have-to-press-gas-to-start.html
Posted By For Type Date
03 Impala 3.4 Have to press gas to start - Chevy Impala Forums This thread Refback 05-08-2012 05:48 AM

Similar Threads
Thread Thread Starter Forum Replies Last Post
Oil press sensor Roggan Chevy Caprice 47 02-20-2011 04:49 PM
Rare green machine 67 chevy impala, hobby, drill press RSS Bot Impala Diecast Toys Cars on eBay 0 01-15-2011 03:50 PM
1994 Buick Road Master will not start. Turn's over but won't start? Rambro2005 Buick Roadmaster 3 02-26-2008 08:38 PM
86 cadillac fleetwood brougham d elegance. when i press on pedal, she makes a... selo Buick Roadmaster 2 11-05-2007 08:29 PM
how do you remove and/or install press in wrist pins in a 400 sbc? Ken Automotive Discussion 0 09-06-2007 12:14 PM




Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.6.0 ©2011, Crawlability, Inc.
This site is not affiliated nor endorsed by General Motors Corp. Chevy Impala and related trademarks are the property of General Motors Corp.