Close
Car Questions
RepairPal is your advocate for car care advice and guidance

Idle surge up and down especially with headlights on

(1990 Honda CRX)
in Burleson, TX on October 19, 2009
battery checks 12.45v before engine start...after engine start battery checks 14.19v... if you rev motor up just alittle battery voltage starts dropping slowly down to 12.50v....when engine is warm and with headlights on idle surges up and down if headlights turned off surge stops. please help
Displaying 1 answer & 0 comments
Popular Answer
on October 23, 2009
Your voltage readings indicate that the alternator is not working correctly on your 1990 Honda CRX. A low voltage condition when the headlights are turned on could be the cause of your idle surge. Please check connections and proper inputs to your alternator before assuming it is faulty.
Get a repair estimate
RepairPal estimates are guaranteed at over 2,000 quality certified locations nationwide.
Or interested in getting a repair? Find a Shop

Similar Questions

View answers to similar questions from RepairPal's community of auto experts and enthusiasts.
I just did a major repair on my car, it all started with car wont strat at all. it was a bad starter. i replaced the ...
Lower timing cover was tore up when the belt broke and won't have new one for 2 weeks need car to go work have put ne...
Didn't find what you were looking for?