|>>|| No. 4222
Having a very strange problem with my 99 Celica 1.8 7A-FE.
The engine has a well-known issue with drinking oil, so I topped it up a couple of weeks ago. I mis-measured by about 100ml or so, meaning that the level ended up going to just cover the "F" marker on the dipstick; I consulted a mechanic who said it shouldn't be an issue - the oil level drops below full when the engine is started, indicating that it should be nowhere near the crankshaft.
Driving it a couple of days later, on the motorway, the car "stuttered", losing revs and engine braking for about half a second; this happened twice in quick succession before returning to normal.
I couldn't re-create the issue, and the mechanic said that wouldn't be a symptom of oil issues, anyway, so I went on driving it.
I had no issues for about a week, driving it about 200 miles in that time, until today. It did the exact same thing again but about 5 - 10 times over about a minute. before again returning to normal.
Any ideas what this might be? Dirt in the fuel? Failing spark plugs/wires? I'm waiting for it to cool down now to check the oil again.