Use a buck convertor to replace fuel *injectors' resistors, has any1 here succeeded ?

I tried to use a 3½ amp output capacity buck convertor ( with auto
voltage i.e. self adjusts PWM timing ratios if input voltage
fluctuates e.g. when starter motor cranks engine & battery voltage
drops to 9½v ) & 2 700mAh lithium batteries ( to feed 4v to *
when b-c could not, during engine cranking ) to replace my honda
F20a 's *' resistors. I fitted 2 1¼" Ø inductor rings & 15000µF to
damp b-c's +ve 12-14v input.
This engine could start & run, but [i] the usual open loop ( when
ECU activates * til O2 sensor produces a voltage of 0.65v ) did
not appear [ii] when I step on throttle to accelerate car, ECU
could not activate injectors long enough to inject enough fuel (
this inadequacy was visible on my digital voltmeter which receives
& reports O2 sensor's output ), so acceleration was less than usual.
This ECU ( made by NEC in 1990 ) [i] activates * by connecting *'
-ve ground, [ii] seems cannot function as usual if I draw +ve 12-14
v from cigarette lighter socket, I'll try to draw +ve 12-14v from
ECU & see if ECU can work as usual.

If some1 replied during 17th -31st Oct'08, pls repost ; my
ISP 's news server was down & now shows no post in this
period.

"TE Chea" > wrote in :

> If some1 replied during 17th -31st Oct'08, pls repost ; my
> ISP 's news server was down & now shows no post in this
> period.
>
>

go check google to see what you missed. KB

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THUNDERSNAKE #9

Protect your rights or "Lose" them
The 2nd Admendment guarantees the others

| go check google to see what you missed. KB

I'm amazed to see many of my posts to newsgroups listed by
Google, but cannot find any reply to this thread. Does Google
run a newsgroup service like some ISP`s do ?

On 2008-11-18, TE Chea > wrote:
>| go check google to see what you missed. KB
>
> I'm amazed to see many of my posts to newsgroups listed by
> Google, but cannot find any reply to this thread. Does Google
> run a newsgroup service like some ISP`s do ?

no. their newsgroup service is unique! http://groups.google.com

most users who post through it use it to send spam, so many people
have it filtered. however it's free, easily accessable, and
searchable.

BTW: looks like you got no replies.

what are you hoping to gain by this substitution?

| no. their newsgroup service is unique! http://groups.google.com
| most users who post through it use it to send spam, so many people
| have it filtered. however it's free, easily accessable, and
| searchable.
| BTW: looks like you got no replies.
Thanks for reply.

| what are you hoping to gain by this substitution?
I want to see any reply to this thread ( I thought this wish
was obvious ).

TE Chea wrote:
[i]
> I tried to use a 3 amp output capacity buck convertor ( with auto
> voltage i.e. self adjusts PWM timing ratios if input voltage
> fluctuates e.g. when starter motor cranks engine & battery voltage
> drops to 9�v ) & 2 700mAh lithium batteries ( to feed 4v to *
> when b-c could not, during engine cranking ) to replace my honda
> F20a 's *' resistors. I fitted 2 1�" � inductor rings & 15000�F to
> damp b-c's +ve 12-14v input.
> This engine could start & run, but [i] the usual open loop ( when
> ECU activates * til O2 sensor produces a voltage of 0.65v ) did
> not appear [ii] when I step on throttle to accelerate car, ECU
> could not activate injectors long enough to inject enough fuel (
> this inadequacy was visible on my digital voltmeter which receives
> & reports O2 sensor's output ), so acceleration was less than usual.
> This ECU ( made by NEC in 1990 ) activates * by connecting *'
> -ve ground, [ii] seems cannot function as usual if I draw +ve 12-14
> v from cigarette lighter socket, I'll try to draw +ve 12-14v from
> ECU & see if ECU can work as usual.

Have you tried the websites of Motorola, On-Semi, ST Microelectronics,
National Semiconductor, and other companies that produce chips for
automotive use? Their applications notes have a great deal of
practical information about driving solenoid valves.

> I tried to use a 3 amp
Correction : 3½ amp, 42w maximum..

| Have you tried the websites of Motorola, On-Semi, ST Microelectronics,
| National Semiconductor, and other companies that produce chips for
| automotive use?
No

| Their applications notes have a great deal of
| practical information about driving solenoid valves
I'll try to draw 12v from ECU 1st ; my present ISP has server
congestion outside 1-7am.