On 09/17/2013 06:00 AM, Scott Dorsey wrote:
> > wrote:
>> My '89 Cressida with 7MGE has developed a problem where it takes numerous t=
>> ries to start.
>>
>> Crank a few - pause - crank a few - pause - crank a few - pause - crank a f=
>> ew - starts
>>
>> Once it finally starts it runs like a clock. No problem. It got worse over =
>> the period of probably a month or so - now it does it pretty consistently w=
>> hen cold but will also do it after getting up to operating temp and sitting=
>> for 5 - 20 mins. If I turn it off and restart immediately it will fire up =
>> again. Sometimes it will start right up cold too.
>>
>> The immediate cause is clearly no spark as per inductive timing light. Then=
>> suddenly there's spark and it runs. I've determined there's fuel - disconn=
>> ected the fitting to the fuel rail when symptoms show up, wrapped it in pap=
>> er towels and cranked - fuel is flowing.
>>
>> So, what does this suggest? ICM going funky? What other culprits?
>>
>> What's a good way to test the ICM?
>
> I'd look at the TDC sensor. I think on those cars there is also a second
> flywheel pickup. If the ICM doesn't see the engine turning, it won't do
> anything. If the sensor has a shorted turn it might be working okay at
> high RPM but not at starting RPM.
> --scott
>

that's step two - eliminate the simple stuff first.


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fact check required