I've searched many times for a thread that deals with a very sporadic, but alarming issue I've had 3 times in the last 4 months.
Possibly TL/DR, but I want to go into detail since I haven't read about this specific issue before.
Most of my driving is interstate commuting, short errands, and occasional recreational twisty road excursions.
The first time it happened I attributed it to a temporarily installed cheap cat that was on my 8 for a couple of weeks to pass emissions inspection;
Leaving a car wash on a hot July day after having sat in line for a while, my car suddenly started sputtering, stalling, and dying repeatedly, to the point where I was stuck on the street with flashers on trying to get it to run long enough to move it.
I could feather the throttle enough to keep it running, but every time I put it in gear, it would sputter and die.
It seemed like misfiring, but with no CEL.
It seemed to be heating the cat up to the point of smoking.
After about a long 5 or 10 minutes, it started to stay running long enough where I was able to drive home a mile away at about 20-30 mph with it sputtering when I would try to accelerate.
By the time I got home, it seemed to be getting better.
I took the cat off, and it ran normally for a couple of months.
The last 2 instances occurred in nearly identical circumstances about a month apart;
Warm, but not hot days, driving through rolling city streets at 30-40 mph with frequent red light stops for about 20 minutes going to the same chicken joint drivethru after work.
Both times, when leaving the drive thru and entering traffic, the same sputtering and dying issues occurred almost identically, where I could barely get it off the street and feather the throttle for about 10 minutes or so with it dying a couple of times.
Both times, after going through it about the same amount of time, it would suddenly start running normally again as if nothing ever happened.
Took it out this morning onto the interstate for some 80 mph cruising for about 10 miles, getting off exits into city stop and go traffic, then back onto the highway with fast, high RPM gear shifting with no issues, just like before.
Read the OBD with the Torque app, no codes at all.
I suspect it could be the aftermarket Chinese fuel pump I installed a couple of years ago acting squirrelly, but I really don't know.
I will attempt to troubleshoot it, but in my experience, sporadic issues like these are nearly impossible to pinpoint unless the problem is occurring at the time.
I'm thinking about buying a quality, RX8 Club recommended fuel pump just to see if it helps.
I'm a good nuts & bolts guy, but electrical troubleshooting is still a mystery.
Any input is appreciated.
Possibly TL/DR, but I want to go into detail since I haven't read about this specific issue before.
Most of my driving is interstate commuting, short errands, and occasional recreational twisty road excursions.
The first time it happened I attributed it to a temporarily installed cheap cat that was on my 8 for a couple of weeks to pass emissions inspection;
Leaving a car wash on a hot July day after having sat in line for a while, my car suddenly started sputtering, stalling, and dying repeatedly, to the point where I was stuck on the street with flashers on trying to get it to run long enough to move it.
I could feather the throttle enough to keep it running, but every time I put it in gear, it would sputter and die.
It seemed like misfiring, but with no CEL.
It seemed to be heating the cat up to the point of smoking.
After about a long 5 or 10 minutes, it started to stay running long enough where I was able to drive home a mile away at about 20-30 mph with it sputtering when I would try to accelerate.
By the time I got home, it seemed to be getting better.
I took the cat off, and it ran normally for a couple of months.
The last 2 instances occurred in nearly identical circumstances about a month apart;
Warm, but not hot days, driving through rolling city streets at 30-40 mph with frequent red light stops for about 20 minutes going to the same chicken joint drivethru after work.
Both times, when leaving the drive thru and entering traffic, the same sputtering and dying issues occurred almost identically, where I could barely get it off the street and feather the throttle for about 10 minutes or so with it dying a couple of times.
Both times, after going through it about the same amount of time, it would suddenly start running normally again as if nothing ever happened.
Took it out this morning onto the interstate for some 80 mph cruising for about 10 miles, getting off exits into city stop and go traffic, then back onto the highway with fast, high RPM gear shifting with no issues, just like before.
Read the OBD with the Torque app, no codes at all.
I suspect it could be the aftermarket Chinese fuel pump I installed a couple of years ago acting squirrelly, but I really don't know.
I will attempt to troubleshoot it, but in my experience, sporadic issues like these are nearly impossible to pinpoint unless the problem is occurring at the time.
I'm thinking about buying a quality, RX8 Club recommended fuel pump just to see if it helps.
I'm a good nuts & bolts guy, but electrical troubleshooting is still a mystery.
Any input is appreciated.
Suspected Fuel Delivery issue?
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