Is there a common area to troubleshoot for surging or bucking under load? When I say surge/buck it feels like the engine is briefly losing power and then back to normal but this symptom is occuring 3-4 times per second under the right conditions.
for example when on the freeway in 5th gear I can easily produce the symptom by pressing the throttle about halfway, the more gas I give it the more severe the symptoms.
Also when accelerating from a stop light the surging occurs as I'm accelerating through 1st and starts to smooth out as I reach the upper rpms of 1st, shift into 2nd and it might surge alittle and then smooth out etc.
The symptom is almost non existant when the car is cold but soon as the temp gauge needle rests at its usual warmup spot the symptoms will get worse.
Check engine light hasn't come on and the symptoms have been there for over a year but it only recently got noticabley worse to where the car isn't fun to drive in it's current state.
I've replaced the fuel filter with a napa gold filter but this didn't help,I also replaced a coilpack that was throwing a misfire code but it only helped a little bit, I pulled the sparkplugs and they all looked normal from what I could find online.
Ive also checked for smoke from tailpipes but not seeing anything, even after letting the car sit for 3-4 days and then fire it up, nothing from tailpipes.
Engine fires right up everytime with no difficulty and idles normally.
The car still has 4 original COPs installed(car has 106k miles) I haven't had a lot of money to throw random parts at it but I'm guessing replacing the COPS would be a good start?
I'm a little hesitant that COPS will solve the issue only because the symptoms seem different from when I've had bad COPS in the past, but I could be wrong.
Engine is stock, stock air intake with K&N filter.
Any ideas appreciated.
for example when on the freeway in 5th gear I can easily produce the symptom by pressing the throttle about halfway, the more gas I give it the more severe the symptoms.
Also when accelerating from a stop light the surging occurs as I'm accelerating through 1st and starts to smooth out as I reach the upper rpms of 1st, shift into 2nd and it might surge alittle and then smooth out etc.
The symptom is almost non existant when the car is cold but soon as the temp gauge needle rests at its usual warmup spot the symptoms will get worse.
Check engine light hasn't come on and the symptoms have been there for over a year but it only recently got noticabley worse to where the car isn't fun to drive in it's current state.
I've replaced the fuel filter with a napa gold filter but this didn't help,I also replaced a coilpack that was throwing a misfire code but it only helped a little bit, I pulled the sparkplugs and they all looked normal from what I could find online.
Ive also checked for smoke from tailpipes but not seeing anything, even after letting the car sit for 3-4 days and then fire it up, nothing from tailpipes.
Engine fires right up everytime with no difficulty and idles normally.
The car still has 4 original COPs installed(car has 106k miles) I haven't had a lot of money to throw random parts at it but I'm guessing replacing the COPS would be a good start?
I'm a little hesitant that COPS will solve the issue only because the symptoms seem different from when I've had bad COPS in the past, but I could be wrong.
Engine is stock, stock air intake with K&N filter.
Any ideas appreciated.