Honda Prelude Forum - PreludeDriver.com

Hey its been ages since i have been on here. Well I put way more money in the lude than she is worth and she got sold tonight for a loss, and am looking for a new lude project car now. That leads to my question....the guy that bought her said on his way home the temp gauge would go up almost to hot when he would step on the gas, but when he idled it would go half way between C and H?? Also said the battery light was coming on at the same time only under a load, but at idle it would go out as well. I told him I suspected the coolant temp sensor, but I didnt know. Any ideas? Has anyone seen this before??


Here she is all finished up!!! Well at least as far as I am taking her.

That's a good lookin' car.

I'd guess that an electrical short might be the source of your problems. If the battery light is coming on under load, there has got to be something drawing power from the engine when it gets all loaded up. Usually a battery light would go off when the engine is spun up, because the alternator will be hammering out more electricity.

Right next to the coolant temperature sensor is an engine temperature sensor. I believe it is this sensor that drives the gauge in the car. That might be a first place to check because it sounds as though the short might be driving the temp gauge up somehow.