2003 civic ex, starts runs for 30 sec. Then dies. [solved]
Thread Starter
Registered!!
Joined: Nov 2022
Posts: 13
Likes: 0
From: California
Rep Power: 0 
2003 civic ex, starts runs for 30 sec. Then dies. [solved]
Having an issue with a 03 ex. It will start and run normally for 30 sec maybe a min. Initially, then die. I have checked timing, it is spot on, no check engine light. If try to start again, it will only run for a couple of seconds maybe and die again. Anyone ever had something similar happen?
"Marge, anyone could miss Canada! All tucked away down there."
Joined: Feb 2016
Posts: 9,636
Likes: 1,283
From: Barrie, ON Canada
Rep Power: 222 
re: 2003 civic ex, starts runs for 30 sec. Then dies. [solved]
Need to see if you're missing fuel or spark when it's trying to start. Any parts replaced recently?
Thread Starter
Registered!!
Joined: Nov 2022
Posts: 13
Likes: 0
From: California
Rep Power: 0 re: 2003 civic ex, starts runs for 30 sec. Then dies. [solved]
So I found I had a code for ELD, voltage too high. (No check engine light though). Got car to run long enough to check charging voltage, and was 16.47 at battery and 17v T alternator. So I figured it was a bad regulator in alternator and got a new one. Installed new alternator and it is doing the same damn thing...wtf?? What controls the alternator output voltage in this system????
"Marge, anyone could miss Canada! All tucked away down there."
Joined: Feb 2016
Posts: 9,636
Likes: 1,283
From: Barrie, ON Canada
Rep Power: 222 re: 2003 civic ex, starts runs for 30 sec. Then dies. [solved]
Did you buy an aftermarket alternator?
need to be oem, junkyard if you don't want to buy new
need to be oem, junkyard if you don't want to buy new
Click Here
Joined: Jan 2019
Posts: 3,570
Likes: 1,349
From: Calgary, Alberta
Rep Power: 125 Thread Starter
Registered!!
Joined: Nov 2022
Posts: 13
Likes: 0
From: California
Rep Power: 0 re: 2003 civic ex, starts runs for 30 sec. Then dies. [solved]
And so, why? I have used reman alternators before with no issues. What makes a 2003 honda civic ex so special? Are they not just refurbished OEM alternators?? I mean, you sound like a honda parts rep...
Click Here
Joined: Jan 2019
Posts: 3,570
Likes: 1,349
From: Calgary, Alberta
Rep Power: 125 re: 2003 civic ex, starts runs for 30 sec. Then dies. [solved]
Honda's are notoriously picky with aftermarket electronics. Given some quick reading you can do here, the most common electronic failure on this forum concerns aftermarket components.
I have no affiliation with Honda besides being a moderator on this forum. I'm a university student.
I have no affiliation with Honda besides being a moderator on this forum. I'm a university student.
"Marge, anyone could miss Canada! All tucked away down there."
Joined: Feb 2016
Posts: 9,636
Likes: 1,283
From: Barrie, ON Canada
Rep Power: 222 re: 2003 civic ex, starts runs for 30 sec. Then dies. [solved]
Pretty much every week someone posts here complaining of issues with the aftermarket alternator they just replaced
Thread Starter
Registered!!
Joined: Nov 2022
Posts: 13
Likes: 0
From: California
Rep Power: 0 re: 2003 civic ex, starts runs for 30 sec. Then dies. [solved]
So I replaced the alternator again, and this one is working fine. However, still doing original issue..will start n run for about a min first time, then just start and die.
"Marge, anyone could miss Canada! All tucked away down there."
Joined: Feb 2016
Posts: 9,636
Likes: 1,283
From: Barrie, ON Canada
Rep Power: 222 re: 2003 civic ex, starts runs for 30 sec. Then dies. [solved]
Maybe it's losing crank or cam signal then, got a scanner that does live data?
Thread Starter
Registered!!
Joined: Nov 2022
Posts: 13
Likes: 0
From: California
Rep Power: 0 re: 2003 civic ex, starts runs for 30 sec. Then dies. [solved]
So a code finally showed up.p0108..map sensor voltage too high. And it seems to start and run now while light is on..so weird..would map sensor cause this?
Super Moderator
Joined: Jun 2012
Posts: 5,073
Likes: 2,096
From: Ohio
Rep Power: 224 Thread Starter
Registered!!
Joined: Nov 2022
Posts: 13
Likes: 0
From: California
Rep Power: 0 re: 2003 civic ex, starts runs for 30 sec. Then dies. [solved]
Ok so I replaced the map sensor and....it's running fine now...so weird...but glad it's working now...thanks to everyone for suggestions though!
Thread
Thread Starter
Honda Civic Forum
Replies
Last Post
Fred7038
Engine
7
Jul 17, 2022 06:15 PM
jimd674
Mechanical Problems/Vehicle Issues and Fix-it Forum
16
Feb 27, 2014 06:52 PM
pittbull121
Mechanical Problems/Vehicle Issues and Fix-it Forum
3
Sep 28, 2012 12:48 PM
loboelprofugo
Mechanical Problems/Vehicle Issues and Fix-it Forum
3
Apr 11, 2010 07:49 AM
