wdubonet
10-27-2011, 12:19 PM
My 92 318is starts great, idles perfect and normally runs well accept that it has a sudden engine surge when accelerating. It gasps like it lost gas or spark at about 4200 rpms to 4400 rpms but if i keep stepping on it, especially in 3rd, it takes off again and pulls hard after about 4400rpms. This condition is unchanging and reproducible every time.
On occasion the car will surge like this after 1500 or 2000 rpms. I then limp around keeping the revs low until it mysteriously disappears. This condition reproduces itself only on a whim and not every day.
All of this started a couple of weeks ago. Since then I have added water remover to the gas, replaced O2 sensor, changed fuel filter, switched to premium gas.
Is there a system of step by step checks to solve these -possibly 2 related-problems?
Thank you for your ideas!
On occasion the car will surge like this after 1500 or 2000 rpms. I then limp around keeping the revs low until it mysteriously disappears. This condition reproduces itself only on a whim and not every day.
All of this started a couple of weeks ago. Since then I have added water remover to the gas, replaced O2 sensor, changed fuel filter, switched to premium gas.
Is there a system of step by step checks to solve these -possibly 2 related-problems?
Thank you for your ideas!