[Gmecm] Injectors Not Firing...

[William Lucke]

When working with stuck injectors, I've had great success with a small 
rig I whipped up... I just attached an injector connector to a push 
button switch to which I then hooked a pair of leads with clips large 
enough to clip to battery terminals. This hits the injector with 
continuous 12V, instead of millisecond pulses like the ECM does. I've 
never had an injector stay stuck after trying this.



Will



> From: "Doug Chase" <doug at chaserace.com>
> Subject: RE: [Gmecm] Injectors Not Firing...
> 
> I had one project that involved a junkyard motor where all 6 injectors were
> plugged from sitting.  New injectors and it fired on the first crank.
> 
> If your injectors are used and they're getting the right voltage then don't
> rule this out.
> 
> Doug Chase
> www.chaserace.com
> 425-269-5636
> 
> -----Original Message-----
> From: gmecm-bounces at diy-efi.org [mailto:gmecm-bounces at diy-efi.org] On Behalf
> Of Clair Davis
> Sent: Sunday, October 08, 2006 7:55 PM
> To: gmecm at diy-efi.org
> Subject: Re: [Gmecm] Injectors Not Firing...
> 
> It's definitely something I should look into at some point, there were a lot
> of things going on at the shop (builder's brother had heart problems for a
> while) so something COULD have been overlooked when they put mine together.
> I'll keep that in mind, and see about dropping some money at Mr. Moates'
> place soon...
> 
> Clair
> 
> 
> ----- Original Message -----
> From: "Jared Ryan" <jryan at caminofx.org>
> To: <gmecm at diy-efi.org>
> Sent: Sunday, October 08, 2006 9:53 PM
> Subject: Re: [Gmecm] Injectors Not Firing...
> 
> 
>> It's just something I thought I'd throw out, because it really stumped
>> me with my 1228746.  There well could be something entirely different
>> in play in your case.
>>
>>   ---> Jared Ryan <---
>> jryan at caminofx.org | http://www.caminofx.org
>>
>> On Oct 8, 2006, at 9:34 PM, Clair Davis wrote:
>>
>>> Jared,
>>> I don't know if it's got VATS enabled, the chip was burned with
>>> criteria I
>>> supplied, and I'm ASSuming that they didn't leave that on for my 69
>>> Plymouth
>>> Valiant.  I won't be able to check that until I get some form of PROM
>>> reading capability, I guess I ought to do that pretty soon...
>>>
>>> Nick,
>>> I didn't think to check for 12V at the plug, I just plugged in the noid
>>> light to see if anything happened.  I'll see if I can check that
>>> tomorrow
>>> after work.
>>>
>>> Clair
>>>
>>>
>>> ----- Original Message -----
>>> From: "Jared Ryan" <jryan at caminofx.org>
>>> To: <gmecm at diy-efi.org>
>>> Sent: Sunday, October 08, 2006 8:56 PM
>>> Subject: Re: [Gmecm] Injectors Not Firing...
>>>
>>>
>>>> Does your PROM have VATS enabled?  That's what messed me up when I
>>>> converted to TBI.  I had exactly the same symptoms: everything was
>>>> fine
>>>> except no fuel was being injected.  The VATS-enabled ECM was simply
>>>> trying to keep me from stealing my own car.
>>>>
>>>>   ---> Jared Ryan <---
>>>> jryan at caminofx.org | http://www.caminofx.org
>>>>
>>>> On Oct 8, 2006, at 8:49 PM, Clair Davis wrote:
>>>>
>>>>> Got everything to the point that I could try to fire the old Plymouth
>>>>> up
>>>>> today.  Everything SEEMS to work, except the injectors.  No gas smell
>>>>> in the
>>>>> tail pipes or intake, no flashing on the noid light, I'm guessing the
>>>>> injectors aren't injecting.
>>>>>
>>>>> Here's what I know:
>>>>> - #1 plug is firing on the early side of TDC
>>>>> - spark is nice and regular (according to the timing light)
>>>>> - there's over 40psi of fuel pressure at the regulator
>>>>> - there's fuel in the rails
>>>>> - the fuel pump relay is doing it's thing
>>>>> - no fuses appear to be blown
>>>>> - ECM is grounded to the engine block, and engine/chassis grounds are
>>>>> good
>>>>>
>>>>> Here's what I don't know:
>>>>> - does the ECM case need to be grounded? (assuming not)
>>>>>
>>>>> I haven't hit my 1990 Camaro FSM yet, but I figured I'd better throw
>>>>> this
>>>>> out to the masses anyway.  Anyone have a clue as to what's going on?
>>>>>  I
>>>>> really think everything is pretty solid, from a wiring standpoint,
>>>>> and
>>>>> fuel
>>>>> is obviously not an issue (other than the small leak at the pump, and
>>>>> the
>>>>> fact that it's not getting in to the combustion chambers).
>>>>>
>>>>> Any help would be greatly appreciated!
>>>>>
>>>>> Clair