I have a 2002 civic hx, it idles fine in nuetral and in park, but when you put it in gear there is excessive vibration, doesn't stall. the dealership told me that they would have to do somekind of scan that would cost $100, thought maybe someone else had a similar problem. I should mention that fuel economy is normal and everything else seems normal.

 

check for broken engine mounts?

 

...more specifically the front motor mount under the rad. which is a notorious for having cracked rubber. If so replace it with an Energy Suspension insert.

 

If the motor mounts are okay, read below.



Excessive vibration in D, S, L, and or R

Probably causes:

1. Intermediate housing assembly worn or damaged
2. Forward clutch defective
3. Reverse brake defective
4. Reverse brake piston stuck, worn or damaged
5. Start clutch defective
6. Start clutch end plate clearance incorrect
7. Start clutch feed pipe damaged or out of round
8. Input shaft worn or damaged
9. ATF deteriorated
10. Valve body assembly defective
11. CVT pulley pressure control valve assembly defective
12. CVT speed change control valve assembly defective
13. CVT start clutch pressure control valve assembly defective
14. Solenoid valve defective
15. Solenoid harness worn or damaged
16. CVT input shaft (drive pulley) speed sensor defective
17. CVT output shaft (drive pulley) speed sensor defective
18. PCM defective
19. Start clutch control system memory in PCM defective
20. Flywheel drive plate worn or damaged
21. Flywheel assembly defective
22. Engine output low.


- Check the forward clutch pressure.

- Check the D indicator, and check for a loose solenoid harness connector.

- Inspect the clutch piston, clutch piston check valve, and O-rings. Check the spring retainer for wear and damage, inspect the clutch end-plate-to-top-disc clearance. If the clearance is out of tolerance, inspect the clutch discs and plates for wear or damage. If the discs and plates are worn or damaged, replace them as a set. If they are okay, adjust the clearance with the clutch plate.

- Check the ATF level, and check the ATF cooler lines for leakage and loose connections. If necessary, clean the ATF cooler lines.

- Calibrate the start clutch control system.







A scan would likely tell you what's wrong, if it were something with the transmission. (etc)