• 1995 Camaro Z28 (LT1) M6 with ~69k miles
• Hurst shifter
• SLP intake & exhaust (dual conical K&N air filters)
• Intake airfoil
• Performance Friction race pads - front (they dust too much)
• Performance Friction street/track pads - rear (I prefer these)
When the engine is at low RPMs (~<2k) and throttle position is greater
than 3/4 in a higher than ideal gear (a co-worker of mine referred to
this as "lugging the engine") the vehicle car starts to shake. I
think that some of the cylinders start missing as the source of the
shaking appears to be from the engine.
None; this is what is confusing me since the engine should set the
"Service Engine Soon" indicator if it detects a misfire.
I did add some fuel injector cleaner but it doesn't appear to be
helping. I think the problem has more do with spark. This condition
is reproducible every time I'm on the highway cruising in 6th gear and
then mashing the throttle. Shaking galore! Lower gears also work but
RPMs have to be low. Hard accelerations from a stop (ex: 0 to 60) do
not cause this to happen and the car's 0 to 60 performance appears to
be the same as it ever was. I've noticed no decrease in fuel economy.
I tried getting the local AutoZone to pull the codes from the ECU but
their reader was not able to link up.
I have a service manual, but it's buried somewhere in my storage and I
have not been able to locate it. I would appreciate troubleshooting
suggestions or possible causes for this symptom. Thank you very much
for your help!