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ideling engine, jumpy

L

lubas79

CEG'er
Joined
Oct 1, 2004
Messages
30
Location
new york
99 csvt
1 year ago I replaced battery and alternator,
2 years ago fuel pump replaced
since 2 yeard 25k miles


when I drive the loghts are dimming from 3.5k to 1.5k RPM's, same way the engine idels sunchronised with the light.


need some ideas, I thing it's an alterantor or electirc fuel pump

thank you

happy new year
 
checked battery it's going from 12.5 down to 11.99 volts


whenthe engine is running it's about 14.5 and 11.94 volts

please help
 
Wiring issue or need new alternator (and maybe new battery).

Check battery cables from terminal to alternator, to Power Distribution Box, from terminal to ground.

Edit. Also check Fuse 5 (fuse holder) and foglamp housing condition.
 
lubas79 said:
checked battery it's going from 12.5 down to 11.99 volts


whenthe engine is running it's about 14.5 and 11.94 volts

please help
Click to expand...


I would take the battery to some place like autozone, and have them test it, and see if your battery is still good. Or take it to where ever you bought it from, if it's still under warranty. Then if that isn't the problem... if I remember correctly your voltage shouldn't be dropping below 12v when the car is running. I'm pretty sure of that one, could be wrong though..... That's about all I can think of for now..... if I think of anything I'll post though..
 
i did not check anything today but I took it for a ride and
when I got it warm and let the engine rn on neutral
lights still dim and with the dim the engine sounds different( I guess drops rpm's) at the same time.

battery I checked again and keeps 12v and alternator still the same.

I will check the grounds tomorrow.




happy new year.
 
one more thing when I start the car(cold or not) ale the lights (dashbord, headlights) dim on and off. afret about 30 seconds the light dims every three second and the engine chenges rpms at the same time



maybe this will help
 
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