Hi ..
I recently bought a 1993 525i with 78 K miles on it. The car ran fine for 2 days, I had the smog done, and it failed, just one HC were on borderline, the guy told me to put premiuim gas and come back, and I did, I put some premium gas, put some fuel cleaner and took it next day and somg passed.
The problem started on the night the first time i had smog done, I drove it for 2 days though so I dont know if the car had the problem from before, but for 2 days it ran fine. The car was shaking at idle, the rpm goes to above 1000 and come to around 500-600 and then goes back up like engine is trying to pick up rpm by itself. well, that night it happened, i turned off and parked.
Next day, everything went perfect in morning, no idle shaking, and i took it for re smog test, it passed. That night, it did the same thing. I took it to mechanic and he filled up some coolant as it was low and asked me to keep track on coolant level.
The next day, I took it to universal studios, drove to orange county, may be drove around 100-120 miles, with AC on at max, it was working PERFECT! No shaking, no stuttering, nothing!
The next morning, the same idle thing, I took it to mechanic, he checked and said he checked everything, engine and gasket seems fine, he thought it could be the tune up,
He changed spark plug, PCV valve, and oilf/fuel filter and air filter. I went to pick it up today, and it was doing the same thing right there.
Now the mechanic is saying he will check my ignition (coil?) tomorrow to see if they are working fine, and may be we need to change them (all or may me 1 or 2 )
Anybody has any comments, what it might be? I heard about ICV valve, mechanic said ICV seems fine, but I am not sure if he even opened it all up. (the ICV)
Any comments / suggestions would be great!
Thanks
I recently bought a 1993 525i with 78 K miles on it. The car ran fine for 2 days, I had the smog done, and it failed, just one HC were on borderline, the guy told me to put premiuim gas and come back, and I did, I put some premium gas, put some fuel cleaner and took it next day and somg passed.
The problem started on the night the first time i had smog done, I drove it for 2 days though so I dont know if the car had the problem from before, but for 2 days it ran fine. The car was shaking at idle, the rpm goes to above 1000 and come to around 500-600 and then goes back up like engine is trying to pick up rpm by itself. well, that night it happened, i turned off and parked.
Next day, everything went perfect in morning, no idle shaking, and i took it for re smog test, it passed. That night, it did the same thing. I took it to mechanic and he filled up some coolant as it was low and asked me to keep track on coolant level.
The next day, I took it to universal studios, drove to orange county, may be drove around 100-120 miles, with AC on at max, it was working PERFECT! No shaking, no stuttering, nothing!
The next morning, the same idle thing, I took it to mechanic, he checked and said he checked everything, engine and gasket seems fine, he thought it could be the tune up,
He changed spark plug, PCV valve, and oilf/fuel filter and air filter. I went to pick it up today, and it was doing the same thing right there.
Now the mechanic is saying he will check my ignition (coil?) tomorrow to see if they are working fine, and may be we need to change them (all or may me 1 or 2 )
Anybody has any comments, what it might be? I heard about ICV valve, mechanic said ICV seems fine, but I am not sure if he even opened it all up. (the ICV)
Any comments / suggestions would be great!
Thanks