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dcrolin




Joined: Mar 09, 2005
Posts: 7



(Msg. 1) Posted: Wed Oct 12, 2005 4:12 am
Post subject: 91 CRX Si Tach Add to elertz
Hello all...I have a 91 rex si with 68K miles. I have had continuing problems with my tach. After the car is warmed up the tach needle reads 0...bottomed. Sometimes it feels like it wants to stall, but it never does. I have addressed this as an idle problem, but I have tried everything, ie... new dizzy, new eacv, new plugs, wires, air filter, fuel filter. I have check all vacuum lines and there is no leak. I took it to a Honda dealer and they say its the tach not reading right...cause my ignition timing is dead on spec. If it is the tach do I have to replace the whole cluster? I don't understand how it can be my tach if it reads correctly until my car warms up... Any insight or tips would be greatly appreciated. Also, I just installed a B&M short shifter, and it seems hard to get into gears...It was a little difficult before the short shifter. Any ideas on what I could do....THANKS!!!!

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TeGGeR®

External


Since: Apr 20, 2005
Posts: 888



(Msg. 2) Posted: Thu Oct 13, 2005 1:53 am
Post subject: Re: 91 CRX Si Tach Add to elertz [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
dcrolin <UseLinkToEmail.TakeThisOut@AutoForumz.com> wrote in
news:1_686205_edab37d3c93b73b50eec190eaa9c1b78@autoforumz.com:

> Hello all...I have a 91 rex si with 68K miles. I have had continuing
> problems with my tach. After the car is warmed up the tach needle
> reads 0...bottomed.


Check the blue wire from the distributor. It goes to the coil. It's either
internally cracked at the connector, or its connection inside the
distributor is corroded.

<snip>


> Also, I just installed a B&M short
> shifter, and it seems hard to get into gears...It was a little
> difficult before the short shifter. Any ideas on what I could
> do


Shift more slowly...

....which defeats the purpose of a "short shifter", of course.

Synchros need time to drag the gears into synchronization before the baulk
rings will allow the dogs to engage. A "short shifter" denies the synchros
that time, unless you shift slowly, which defeats the purpose of a "short
shifter", of course.

Also, your synchros are getting a bit worn, and your "short shifter" is
throwing even more load on them than the stock shifter did. You will wear
the synchros out faster now. Not only that, your efforts to force the lever
into gear are wearing the shift forks more quickly as well.

"Short shifters" are a good way of wrecking your tranny in short order.
Have you ever priced a tranny replacement? Rebuilds are even worse.

I'd uninstall that "short shifter" ASAP if I were you, and leave that sort
of nonsense to the real racers it was designed for.



--
TeGGeR®

The Unofficial Honda/Acura FAQ
www.tegger.com/hondafaq/

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Burt Squareman

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Since: Sep 29, 2005
Posts: 4



(Msg. 3) Posted: Fri Oct 14, 2005 2:55 am
Post subject: Re: 91 CRX Si Tach Add to elertz [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
"dcrolin" <UseLinkToEmail.DeleteThis@AutoForumz.com> wrote in message news:1_686205_edab37d3c93b73b50eec190eaa9c1b78@autoforumz.com...

> Hello all...I have a 91 rex si with 68K miles. I have had continuing
> problems with my tach. After the car is warmed up the tach needle
> reads 0...bottomed. Sometimes it feels like it wants to stall, but it
> never does. I have addressed this as an idle problem, but I have tried
> everything, ie... new dizzy, new eacv, new plugs, wires, air filter,
> fuel filter. I have check all vacuum lines and there is no leak. I
> took it to a Honda dealer and they say its the tach not reading
> right...cause my ignition timing is dead on spec. If it is the tach do
> I have to replace the whole cluster? I don’t understand how it can be
> my tach if it reads correctly until my car warms up... Any insight or
> tips would be greatly appreciated. Also, I just installed a B&M short
> shifter, and it seems hard to get into gears...It was a little
> difficult before the short shifter. Any ideas on what I could
> do....THANKS!!!!

The igniter has one lead output called the tach output. If by chance
the igniter tach portion quits when the igniter gets hot then it a sign
of an igniter problems or heat dissipation problem (missing conducting
grease?) What you can do is to jump the tach output directly to your
tachometer to troubleshoot.
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dcrolin




Joined: Mar 09, 2005
Posts: 7



(Msg. 4) Posted: Sat Oct 15, 2005 2:52 am
Post subject: Re: 91 CRX Si Tach Add to elertz [Login to view extended thread Info.]
How exactly do I jump the tach output....Can you explain. Thanks for the response.
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TeGGeR®

External


Since: Apr 20, 2005
Posts: 888



(Msg. 5) Posted: Sat Oct 15, 2005 8:00 pm
Post subject: Re: 91 CRX Si Tach Add to elertz [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
"Burt Squareman" <BurtSquareman.RemoveThis@none.com> wrote in
news:yLH3f.2266$BZ5.1490@newssvr13.news.prodigy.com:


<snip>


>
> The igniter has one lead output called the tach output.



Yeah, that's the blue wire I told him to check.


> If by chance
> the igniter tach portion quits when the igniter gets hot then it a
> sign of an igniter problems or heat dissipation problem (missing
> conducting grease?)


Good point.

jim beam, your thoughts on this?


> What you can do is to jump the tach output
> directly to your tachometer to troubleshoot.


Or see the new page here:

http://www.tegger.com/hondafaq/igniter-operation/off-car-testing.html

--
TeGGeR®

The Unofficial Honda/Acura FAQ
www.tegger.com/hondafaq/
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jim beam1

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Since: Jul 09, 2004
Posts: 320



(Msg. 6) Posted: Sat Oct 15, 2005 8:00 pm
Post subject: Re: 91 CRX Si Tach Add to elertz [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
TeGGeR® wrote:
> "Burt Squareman" <BurtSquareman.TakeThisOut@none.com> wrote in
> news:yLH3f.2266$BZ5.1490@newssvr13.news.prodigy.com:
>
>
> <snip>
>
>
>>The igniter has one lead output called the tach output.
>
>
>
>
> Yeah, that's the blue wire I told him to check.
>
>
>
>>If by chance
>>the igniter tach portion quits when the igniter gets hot then it a
>>sign of an igniter problems or heat dissipation problem (missing
>>conducting grease?)
>
>
>
> Good point.
>
> jim beam, your thoughts on this?

if the tach output quits when hot, i'd say the igniter's just about to
fail. change it immediately - you don't want to be stranded in the
middle of a busy freeway intersection. trust me on that one.

otoh, it could just be a bad tach connector in the cluster. the
instrument circuit board is just a flimsy piece of plastic. sometimes
disassembly, cleaning & reassembly cleans the connections sufficiently
to make everything right again.

>
>
>
>>What you can do is to jump the tach output
>>directly to your tachometer to troubleshoot.
>
>
>
> Or see the new page here:
>
> http://www.tegger.com/hondafaq/igniter-operation/off-car-testing.html
>
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Burt S.

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Since: Oct 16, 2005
Posts: 3



(Msg. 7) Posted: Sun Oct 16, 2005 2:55 am
Post subject: Re: Re: 91 CRX Si Tach Add to elertz [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
"dcrolin" <UseLinkToEmail RemoveThis @www.autoforumz.com> wrote in message news:687892_40871f217983041a20ac0466c2a230d4@autoforumz.com...
> "" wrote:

> How exactly do I jump the tach output....Can you explain. Thanks for
> the response.

Unplug the blue wire (the smaller one on the side of the igniter)
Clip an alligator clip on it and run the lead to your tach. At the
tach is the same blue wire. This is not the best test. Instead
follow these instructions:

1.) Probe an analog voltmeter negative on small blue wire nearest to
the igniter. (The teminal on the left side of the igniter.)
2.) The voltmeter positive goes to positive battery.
3.) Voltage should rise/pulse and stay there during a hot idle.
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