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al advance · Aug 4, 2009, 02:18 PM

My 92 honda accord ex auto transmission seems to have a misfire. This started only after I hit a bear damage to the left front headlamp assy, the left front fender and the hood. The car drives still so I replaced the headlamp assy. Also I noticed now the rpm gauge does not work properly. I have replaced the spark plugs and the wire set as well as the main relay and the tcm in hope it would be in one of those. Yet the car still jerks of misfires. I can rev up the engine in park and the check engine light comes on.

Do you have any idea what could be the problem as to what may be causing this?

Thank you.

Al

TxGreaseMonkey · Aug 4, 2009, 02:45 PM

. Check for codes:

Service Check Connector

When the Check Engine Light (CEL) is on, it will be necessary to locate the 2-pin Service Check Connector (SCC) on OBD-I (pre-1996) Hondas. It is normally located under the dash, approximately 1 inch (2.5 cm) from the right kick panel. Take a small screwdriver and carefully pry it from the rubber mount. The other 3-pin connector in the rubber mount is the Data Link Connector (DLC), which should be left alone. Jump the SCC with a paper clip, turn the ignition switch to ON (Position II), and count the number of times, if any, the CEL flashes. Reference a Diagnostic Trouble Code (DTC) chart to identify the code being displayed. The SCC is also jumped, when an induction timing light is used to check engine timing.

After troubleshooting, turn the ignition switch OFF, remove the jumper wire, and reset the ECM, by removing the BACK UP (7.5 A) fuse from the under-hood fuse box for 10 seconds. Disconnecting the BACK UP fuse cancels preset radio stations and the clock setting; therefore, they will need to be reset.

. Replace the Ignition Control Module (ICM) and coil:

https://www.askmehelpdesk.com/cars-t...tml#post265896

The BLU wire, going to the ICM, connects to the tachometer. Erratic rpm is often a sign the ICM is bad. ICMs and coils are problematic components on Hondas. I recommend changing them every 120,000 miles or 10 years, whichever comes first.