Car dying at Low Idle and throwing codes.
Thread Starter
On The Tree
Joined: Jun 2004
Posts: 171
Likes: 0
Car dying at Low Idle and throwing codes. So i started getting codes thrown on my car and the car will die right after pulling into drive or after releasing the brake into 1st gear. It will studder and not go until i push the gas halfway in or wait 5 to 10 seconds. The codes are:
p0420 & p0430 Catalyst Efficiency below threshold on both banks
p0171 system to lean on both banks
So i recently had the cats removed and am going to do the rear o2 mod. Anyone else have any opinions on why its still doing it after the cats were removed? Think its maybe my fuel injectors or can the front o2s cause this is they are bad also? I also have a electronic cutout on my exhaust but its usually closed. Thanks for the help.
p0420 & p0430 Catalyst Efficiency below threshold on both banks
p0171 system to lean on both banks
So i recently had the cats removed and am going to do the rear o2 mod. Anyone else have any opinions on why its still doing it after the cats were removed? Think its maybe my fuel injectors or can the front o2s cause this is they are bad also? I also have a electronic cutout on my exhaust but its usually closed. Thanks for the help.
Staging Lane
Joined: Oct 2011
Posts: 59
Likes: 3
Your Cats and rear O2s aren't the problem. I mean, you can keep them or leave them out. It's your choice.
To me, it sounds like a fuel pressure issue from the hesitation you've described. The first thing you should do is check your fuel pressure at the fuel rail. (If you have a pressure tester on hand. If not then your local auto repair shop will usually have one on hand.) If it's lower than 60psi after you cycle the key, then follow it down to your fuel filter and change it out anyway for some peace of mind. If the pressure still low at the fuel rail, consider a new fuel pump.
I can rule out your all or the injectors clogging up at the same time. It'd take some pretty extreme circumstances to clog 'em up all at the same time. So breathe easy, friend.
Good luck on finding your fuel issue.
To me, it sounds like a fuel pressure issue from the hesitation you've described. The first thing you should do is check your fuel pressure at the fuel rail. (If you have a pressure tester on hand. If not then your local auto repair shop will usually have one on hand.) If it's lower than 60psi after you cycle the key, then follow it down to your fuel filter and change it out anyway for some peace of mind. If the pressure still low at the fuel rail, consider a new fuel pump.
I can rule out your all or the injectors clogging up at the same time. It'd take some pretty extreme circumstances to clog 'em up all at the same time. So breathe easy, friend.
Good luck on finding your fuel issue.
Thread Starter
On The Tree
Joined: Jun 2004
Posts: 171
Likes: 0
Your Cats and rear O2s aren't the problem. I mean, you can keep them or leave them out. It's your choice.
To me, it sounds like a fuel pressure issue from the hesitation you've described. The first thing you should do is check your fuel pressure at the fuel rail. (If you have a pressure tester on hand. If not then your local auto repair shop will usually have one on hand.) If it's lower than 60psi after you cycle the key, then follow it down to your fuel filter and change it out anyway for some peace of mind. If the pressure still low at the fuel rail, consider a new fuel pump.
I can rule out your all or the injectors clogging up at the same time. It'd take some pretty extreme circumstances to clog 'em up all at the same time. So breathe easy, friend.
Good luck on finding your fuel issue.
To me, it sounds like a fuel pressure issue from the hesitation you've described. The first thing you should do is check your fuel pressure at the fuel rail. (If you have a pressure tester on hand. If not then your local auto repair shop will usually have one on hand.) If it's lower than 60psi after you cycle the key, then follow it down to your fuel filter and change it out anyway for some peace of mind. If the pressure still low at the fuel rail, consider a new fuel pump.
I can rule out your all or the injectors clogging up at the same time. It'd take some pretty extreme circumstances to clog 'em up all at the same time. So breathe easy, friend.
Good luck on finding your fuel issue.
Thank you for the reply!! I was also thinking about fuel pressure because it feels like its not getting the right amount with the hesitation and car dying. Only at low idles also. I will do what you suggested and go to the parts store and ck the pressure! Thanks man!
Thread Starter
On The Tree
Joined: Jun 2004
Posts: 171
Likes: 0
Your Cats and rear O2s aren't the problem. I mean, you can keep them or leave them out. It's your choice.
To me, it sounds like a fuel pressure issue from the hesitation you've described. The first thing you should do is check your fuel pressure at the fuel rail. (If you have a pressure tester on hand. If not then your local auto repair shop will usually have one on hand.) If it's lower than 60psi after you cycle the key, then follow it down to your fuel filter and change it out anyway for some peace of mind. If the pressure still low at the fuel rail, consider a new fuel pump.
I can rule out your all or the injectors clogging up at the same time. It'd take some pretty extreme circumstances to clog 'em up all at the same time. So breathe easy, friend.
Good luck on finding your fuel issue.
To me, it sounds like a fuel pressure issue from the hesitation you've described. The first thing you should do is check your fuel pressure at the fuel rail. (If you have a pressure tester on hand. If not then your local auto repair shop will usually have one on hand.) If it's lower than 60psi after you cycle the key, then follow it down to your fuel filter and change it out anyway for some peace of mind. If the pressure still low at the fuel rail, consider a new fuel pump.
I can rule out your all or the injectors clogging up at the same time. It'd take some pretty extreme circumstances to clog 'em up all at the same time. So breathe easy, friend.
Good luck on finding your fuel issue.
Ok so i went to the shop and tested my fuel pressure. It sat at a steady 60 the entire time. So i decided to go get my codes checked again just to make sure its still throwing the o2 codes. It was but it also came back with a p0300 code. Multiple Misfire detected. So i guess im gonna check the sparks and wires tomorrow. If thats good then im gonna try and replace the front 2 o2s and do the o2 mod delete for the rear or get them tuned out.
I have no idea what else it could be. The car only does this in low idle. It feels like i swapped out my cam its so rough.
Teching In
Joined: Feb 2012
Posts: 2
Likes: 0
sounds like u have a vacuum leak try spaying carb cleaner around the intake and see if it smooths out. if u have access to a scan tool with data look at ur short term fuel trim should run less than 10% +or- if its +10 or more u have a vacuum leak hope this helps...
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The lean code could be bogus, caused by front O2 sensor
performance / faults. Before this code pops you will have
trimmed all the way to +25% LTFT, which over-enriches
and makes idle unstable.
You need a tiebreaker (wideband O2 meter). Or reset the
PCM and see if it's clean for a bit until it relearns how to
be dumb.
performance / faults. Before this code pops you will have
trimmed all the way to +25% LTFT, which over-enriches
and makes idle unstable.
You need a tiebreaker (wideband O2 meter). Or reset the
PCM and see if it's clean for a bit until it relearns how to
be dumb.
Thread Starter
On The Tree
Joined: Jun 2004
Posts: 171
Likes: 0
The lean code could be bogus, caused by front O2 sensor
performance / faults. Before this code pops you will have
trimmed all the way to +25% LTFT, which over-enriches
and makes idle unstable.
You need a tiebreaker (wideband O2 meter). Or reset the
PCM and see if it's clean for a bit until it relearns how to
be dumb.
performance / faults. Before this code pops you will have
trimmed all the way to +25% LTFT, which over-enriches
and makes idle unstable.
You need a tiebreaker (wideband O2 meter). Or reset the
PCM and see if it's clean for a bit until it relearns how to
be dumb.
