6th Gen ('00-'05): Random Mis-Fire, only when turning right?
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Joined: May 2014
Posts: 3
Random Mis-Fire, only when turning right?
Alrighty guys, here's an interesting one.
2005 SS Tony Stewart Edition 107,XXX miles.
So for about 8 months whenever I steer right while driving my car stutters, like it's going to stall but never does. This is mainly happening while on on‐ramps or off ramps. While this happens my car throws the P0300 (random misfire). It feels like a bad vacuum leak but once I straighten up the car feels fine and the engine light stops flashing. I tried to replicate this with the car on jack stands, but I couldn't, it seems fine with no load and steering right. Initially I took my car to a shop and they said that I needed a new computer, so I replaced the PCM with a ZZP one, the issue remains.
Here's a list of things I've replaced.
Plugs/Wires
ZZP Coil Packs
MAF sensor
TPS (Throttle Position Sensor)
Idle Air Control Valve
Fuel Filter
Vacuum Lines
Catalytic w/ 02 sensor
At this point, I'm thinking that theres an electrical issue, maybe something grounding out? If you guys can think of something or have even heard of a similar issue, please let me know! Thanks in advance!
** Forgot to add that while my car is mis-firing, my tachometer is acting crazy, dancing all over the place**
2005 SS Tony Stewart Edition 107,XXX miles.
So for about 8 months whenever I steer right while driving my car stutters, like it's going to stall but never does. This is mainly happening while on on‐ramps or off ramps. While this happens my car throws the P0300 (random misfire). It feels like a bad vacuum leak but once I straighten up the car feels fine and the engine light stops flashing. I tried to replicate this with the car on jack stands, but I couldn't, it seems fine with no load and steering right. Initially I took my car to a shop and they said that I needed a new computer, so I replaced the PCM with a ZZP one, the issue remains.
Here's a list of things I've replaced.
Plugs/Wires
ZZP Coil Packs
MAF sensor
TPS (Throttle Position Sensor)
Idle Air Control Valve
Fuel Filter
Vacuum Lines
Catalytic w/ 02 sensor
At this point, I'm thinking that theres an electrical issue, maybe something grounding out? If you guys can think of something or have even heard of a similar issue, please let me know! Thanks in advance!
** Forgot to add that while my car is mis-firing, my tachometer is acting crazy, dancing all over the place**
Last edited by kenneyjuice; Aug 15, 2020 at 12:03 PM.
Joined: Mar 2020
Posts: 23
I was going to say fuel pump issue until I saw the tach going crazy when it occurs.
When gas gets pushed to one side when taking a corner and the pump is either damaged, on it's way out or installed incorrectly it can cause a studder from fueling issues.
Possibly a short that is grounding out when the force from turning makes the wire in question ground out.
The wire bundle is shifting to one side in other words.
I think the tachometer has a wire that goes to the transmission.
Check there as a possible starting point.
The short itself might not just be the tach grounding, the wire bundle has another wire that is making the computer freak out too.
A couple of frayed wires could be the culprit and probably is going to be just the one bundle.
I am not an expert but this sounds feasible.
When gas gets pushed to one side when taking a corner and the pump is either damaged, on it's way out or installed incorrectly it can cause a studder from fueling issues.
Possibly a short that is grounding out when the force from turning makes the wire in question ground out.
The wire bundle is shifting to one side in other words.
I think the tachometer has a wire that goes to the transmission.
Check there as a possible starting point.
The short itself might not just be the tach grounding, the wire bundle has another wire that is making the computer freak out too.
A couple of frayed wires could be the culprit and probably is going to be just the one bundle.
I am not an expert but this sounds feasible.
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