Si charging problem

  • Thread starter Thread starter notbob
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notbob

New to the group, and Honda owner for past 6 years (not counting
motorcycles). Problem is my '87 Si hatchback has a weird charging
problem. The charging light stays on till I hit 4K rpm, then goes
off. This is all the more weird because if it's a cold night, I can
come out, start the car up, and the charging light goes off at idle
rpm's, like normal. Next day (when hotter), back to minimum 4K rpm
for charging light to quench. I suspect worn fan belts. Yes? No?

FYI: Black '87 hatchback with original engine (225K mi), replaced
tranny (vx or vh, very high gearing), the rest all stock. Engine just
purrs and still gets 36 mpg (with help of new tranny). Honda, best
car on the road!

notbob ...working toward an S2000
 
Worn communtator (slip ring.) Brushes worn too. Use to have the same
problem. Brushes goes for about 5 bucks but you can always file down
the communtator (slip ring.)
 
Worn communtator (slip ring.) Brushes worn too. Use to have the same
problem. Brushes goes for about 5 bucks but you can always file down
the communtator (slip ring.)
 
notbob said:
New to the group, and Honda owner for past 6 years (not counting
motorcycles). Problem is my '87 Si hatchback has a weird charging
problem. The charging light stays on till I hit 4K rpm, then goes
off. This is all the more weird because if it's a cold night, I can
come out, start the car up, and the charging light goes off at idle
rpm's, like normal. Next day (when hotter), back to minimum 4K rpm
for charging light to quench. I suspect worn fan belts. Yes? No?

FYI: Black '87 hatchback with original engine (225K mi), replaced
tranny (vx or vh, very high gearing), the rest all stock. Engine just
purrs and still gets 36 mpg (with help of new tranny). Honda, best
car on the road!

notbob ...working toward an S2000
Click to expand...

It could be an alternator problem. Some of the larger auto parts stores
will test your alternator for free.
 
notbob said:
New to the group, and Honda owner for past 6 years (not counting
motorcycles). Problem is my '87 Si hatchback has a weird charging
problem. The charging light stays on till I hit 4K rpm, then goes
off. This is all the more weird because if it's a cold night, I can
come out, start the car up, and the charging light goes off at idle
rpm's, like normal. Next day (when hotter), back to minimum 4K rpm
for charging light to quench. I suspect worn fan belts. Yes? No?

FYI: Black '87 hatchback with original engine (225K mi), replaced
tranny (vx or vh, very high gearing), the rest all stock. Engine just
purrs and still gets 36 mpg (with help of new tranny). Honda, best
car on the road!

notbob ...working toward an S2000
Click to expand...

It could be an alternator problem. Some of the larger auto parts stores
will test your alternator for free.
 
For that matter, test your battery too. you can ruin an alternator on a bad
battery.
 
For that matter, test your battery too. you can ruin an alternator on a bad
battery.
 
for charging light to quench. I suspect worn fan belts. Yes? No?
Click to expand...

Yep, it was the fan belt. I've never seen this new style fan belt.
Usually, with old v-type fan belts, if the belt was there, it would
work. Sure, it might slip, and be terribly noisey, but it would work.
I never experience a fan belt that could be tight and still slip. Oh
well. Live and learn.

Thanks all who offered help.

nb
 
for charging light to quench. I suspect worn fan belts. Yes? No?
Click to expand...

Yep, it was the fan belt. I've never seen this new style fan belt.
Usually, with old v-type fan belts, if the belt was there, it would
work. Sure, it might slip, and be terribly noisey, but it would work.
I never experience a fan belt that could be tight and still slip. Oh
well. Live and learn.

Thanks all who offered help.

nb
 
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