[Diy_efi] My Tach is crazy, Ignition problem.

Bret Levandowski skishop69
Wed Nov 9 16:24:51 UTC 2005


Ok... On the ECM you should have grounds on the following pins: A12, D1 & D6. You should have switched +12v on the following ECM pins: B1, C16, & A6. Finally, you should have +12v on pin C9 ONLY when cranking the engine.  HTH,  Ski 

Facundo Lozano Ureta <flozano at twistedandes.com> wrote:I have 2 Grounds, one to the distributor, and other to the engine, but I 
Think thath is not my problem, When I disconnect the timming connector, my 
engine runs good, and my tach don't indicate problems.
May be I have problems with my computer Ground? I'm only have one ground to 
the battery to the ECM.
The problem begin when the ECM take the control of the ignition.

----- Original Message ----- 
From: "Dustin Lof" 
To: 
Sent: Wednesday, November 09, 2005 12:32 AM
Subject: Re: [Diy_efi] My Tach is crazy, Ignition problem.


> Is your ignition module grounded good, not just the
> metal backing but both screws that secure it, the
> metal under the screws are the actual ground and need
> to make a good connection. the metal backing is just a
> heat sink.
>
> how does it run with the tach disconnected?
>
>
> --- Facundo Lozano Ureta 
> wrote:
>
>> Only the TBI, and GM HEI Distributor, but my engine
>> is Still being a Toyota
>> 2F inline 6 Cilynder.
>>
>>
>> ----- Original Message ----- 
>> From: "Dustin Lof" 
>> To: 
>> Sent: Tuesday, November 08, 2005 12:13 AM
>> Subject: Re: [Diy_efi] My Tach is crazy, Ignition
>> problem.
>>
>>
>> >
>> > Are you installing a 4.3 or just the tbi?
>> > is it a GM module and coil or is it MSD? Dustin
>> Lof
>> > --- Facundo Lozano Ureta
>> 
>> > wrote:
>> >
>> >> Hello
>> >>
>> >> I have a toyota Land Cruiser with 2F engine (I6)
>> and
>> >> I'm installing a 4.3
>> >> Chevy TBI.
>> >> My engine run, but my tach is crazy on high RPM
>> >> (2500 RPM) and some times at
>> >> IDLE, and at the same time my ignition don't fire
>> >> when the tach is crazy.
>> >> My ignition module is new, I use an 1227747 ECM,
>> and
>> >> a custom chip. I have
>> >> a GM HEI Dist, and the ignition module is
>> installed
>> >> outside of the
>> >> distributor.
>> >> When I disconect the timing connector, My tach
>> work
>> >> grat and my ignition
>> >> work witout fails.
>> >> any idea?
>> >> may be I have problems with my custon chip or my
>> >> coil?
>> >>
>> >>
>> >>
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>> >
>> >
>> >
>> >
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