A strange fuel/spark issue

Christopher Scarpulla cscarpulla at gmail.com
Thu Oct 5 15:24:50 EDT 2017


I don't think the lube type is all that critical. Just keep in mind that a
small bit may get into the cylinder.

On Oct 5, 2017 2:19 PM, "David Pertuz" <d.pertuz at gmail.com> wrote:

> Aha! Good bet that's it. My new injectors didn't come with o-rings, so I
> took them off the old injectors. I tried to be as careful as I could. At
> least I've got extras. What kind of lube is appropriate?
>
> David
>
> Sent from my iPhone
>
> On Oct 5, 2017, at 1:41 PM, Christopher Scarpulla <cscarpulla at gmail.com>
> wrote:
>
> Sounds like you nicked/pinched a lower o-ring when reinstalling the
> injectors. Pull them back out, give 'em a good looking over, and use a
> coating of lubricant when putting them back in.
>
> Fun fact: a torn lower o-ring can allow enough fuel past it to hydro-lock
> your motor.
>
>
>
> On Oct 5, 2017 1:15 PM, "David Pertuz" <d.pertuz at gmail.com> wrote:
>
>> Ok, I spoke too soon - car is clearly running better, but still drinking
>> gas through a fire hose and still dumping raw fuel all the way through the
>> engine and out through the header gasket. I expected the new injectors to
>> fix this! Will check #4 plug again and then dive into diagnosis.
>>
>>
>> On Wednesday, October 4, 2017, David Pertuz <d.pertuz at gmail.com> wrote:
>>
>>> Installed new injectors and fuel filter over the weekend, problem
>>> solved. Idle is slightly rough so there's a little bit more diagnosis to do
>>> - now to see if my s**t fuel consumption goes back to normal!
>>>
>>> David
>>> Chicago
>>>
>>> On Tue, Sep 26, 2017 at 7:45 PM, David Pertuz <d.pertuz at gmail.com>
>>> wrote:
>>>
>>>> Josh Palmer clued me in to some Bosch injectors that were on closeout
>>>> for $25 each, so I just ordered new injectors - that's the same it would
>>>> cost me to have mine sent out for cleaning, and there's no guarantee those
>>>> would all be good. Some hose pliers are on the way so I can replace the
>>>> fuel filter again, and after that all should be good. Well, except for the
>>>> list of ten other minor things that have been invariant for ten years :)
>>>>
>>>> Unfortunately my commute to work is going to go to shit next week, and
>>>> I may find myself having to sometimes drive to work for the first time in a
>>>> decade. If I do, the SE-R will gen the car for it! :)
>>>>
>>>> David
>>>>
>>>>
>>>> On Tuesday, September 26, 2017, Ben Fenner <fenfam at sc.rr.com> wrote:
>>>>
>>>>> Sorry for the late reply, but I was going to say that a stuck injector
>>>>> sounds most plausible. A properly working ignition won't be able to light
>>>>> off the mixture, and you'll get the fuel running down the front if the head
>>>>> gasket isn't perfectly sealed.
>>>>>
>>>>> Congrats on the Saab, and for getting the SE-R back on the road after
>>>>> such a long wait. I have had rod knock enough times to know it when I hear
>>>>> it, and at one time I was overly sensitive to the noise and found a minor
>>>>> rattle at ~5k RPM that I started to worry about. After a few months, I
>>>>> finally narrowed it down to a loose alternator pivot bolt! =D
>>>>> You never know...
>>>>>
>>>>> -Ben Fenner
>>>>> 1994 Turbo SE-R
>>>>> 2000 M Coupe
>>>>>
>>>>> On 9/16/2017 4:54 PM, David Pertuz wrote:
>>>>>
>>>>> Update: Injector #4 was stuck open. No idea how that happened, but
>>>>> when I replaced it the problem went away. Good!
>>>>>
>>>>>
>>>>> David
>>>>>
>>>>>> Chicago
>>>>>>
>>>>>
>>>>>
>>>
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