Almost BG bound-Need help AGAIN

[oricale]

Allright here we are....its like an old house or in my case an old 50's area Jet we in the Airforce are STILL USING!!....every time you figure out one problem...BAM!..another one pops up.....

Anywho!.....I figured out the Pin was the problem with the CODE 42...NOW as soon as I started it up,The idel seemed great but as soon as I gave it gas it sputters/smells of gas and tries to stall...and is has a definate MISS!...

so here are the symptoms!:

*Idles rough
*smokes out the drivers side bank
*backfires(once or twice)
*OBVIOUS MISS on rev up
*NO CODES
*SMELLS of FUEL
*light "Ticking"(Injector?)

I have pulled the plenum off just to check everything and everything is good:

* I am running Autolight Double platnum, gauged at .32
* Wires are new
* Injectors are new(rebuilt FIC)
* Removed secondary control system
* Chip'd by Pete to include secondary removal
* ALL vaccum removed or replaced except required to run the HVAC and ect.


MEOW> With the code #42 I was told by Tom it was running in LIMP MODE...If that is the case the secondary injectors would not have been used right??....now that the code is cleared I am now trying to use a bad injector?(that would have been bad the whole time and not know it?)

I would rather NOT pull the plenum AGAIN till I can narrow it down!....to something.

What ya'll think???????




(How many people caught the "meow"?..(Super troopers...HA!)

[tomtom72]

FIC rebuilt = possible bad injector. Not a Knock on Jon. This is always a possibility when using rebuilt parts. Your symptoms, now that the pin is straight, are that the left bank has one or more dumping fuel or no spark....I vote for dumping fuel as you say it smokes...black smoke of a rich condition? What does the tail pipe on the left side smell like, unburnt fuel???

[oricale]

yuuup..and the whole garage smells of fuel too. I pulled #1 and #3 plugs and #1 was soaking wet and #3 was real rich...

[XfireZ51]

Is any of this a remnant of having been in "limp home" mode?
Have u had an opportunity to wring the car out?

[oricale]

Nah the only real difference I noticed was lack of power, fluctuation of idle and hesitation and the code..it ran at least! so I dont know if there could be a issue from the limp mode...who knows

[tomtom72]

When I fixed my mistake and unbent the pin the car returned to normal with out me using my scanner to erase the code.


Tom
If you are coming to BG then just give it to me there. No sweat!

[tomtom72]

My feeling is that either that spark to cyls 1 & 3 is no good; or the injectors at those cylinders are sticking open/leaking large amounts of fuel. The thing is to know how the fuel program was set up so you can know at what % off idle the second set comes on line.

See with the OE system at idle if the car behaves like yours you could say with a high degree of certainty that the primary injectors at 1 & 3 are stuck open or/and leaking fuel. With the secondary delete i don't know enough to make a stronger statement than I suspect that those injectors are fubared or those cylinders are getting no spark.


Tom

[oricale]

so throw the stock chip in to see if it runs??

[tomtom72]

Originally Posted by oricale

so throw the stock chip in to see if it runs??

sorry I had some job related stuff to do. You can't use the stock chip to my way of thinking because you took out all the hardware for the factory secondaries. JMHO. Slim chance that it will set all kinds of DTC's associated with the secondary system ( missing parts ) and turn into an L98...which could be fine for checking the primary injectors against leaking...maybe.

I don't know enough of this electronics stuff to say for sure. My reasoning is that if there is a DTC set for engine management hardware, the ECM is programed to "lock out" the secondary system and run the motor on what basically is an L98 program: batch fire on the injectors if I am not mistaken. If that is truly the case then yes using the stock PROM will let you know if the primaries are leaking or have some other issue because the symptoms should be exactly the same. Conversely, if the issue is with your secondary injectors, then the bad behavior should not evidence itself....I'm just not sure if my theory holds water when dealing with a secondary delete motor.


Tom

Just to be clear on my lack of knowledge: the "lock out" is programed into the stock PROM as a safety precaution. If any motor related DTC is set, the secondaries are "locked out" until the DTC is cleared & repaired. That is the OEM programing. I have no clue what differences a secondary delete program entails.

[scottfab]

Here's shot in the dark.
Try pulling the battery to reset everything.
Then if still running crappy.....
do a fuel pressure leak down test.
If it looses pressure in a few seconds. ....
yah, leaky injectors.

Sorry did not follow the bent pin thing.
Was it under the plenum?
When it was straightened it ran fine for more than
one start-up or ???