CCCI fuse

[larrym]

Had a little trouble yesterday, got into it a bit and noticed some knock let off and chalked it up to not priming the Alky pump. Down the road about 30min later I roll to a stop give it some gas it jumps and dies. No start, check and change the CCCI fuse fires up and drives fine under normal cruising conditions, was idling a little high in gear while rolling but settles down when it stops.


Put my foot into it today and it knocking again    is my ignition module or coil packing it?


it seemed to be getting enough fuel according to the wideband.

[SuperSix]

I wold start with why fiddling with the fuse had an effect.

[Steve Wood]

Not sure, but, something musta pulled too much current if the fuse was blown and that would be the module, I think

You can ohm the coil packs and see if they look normal...I think a bad coil will cause a module to fail with time

[phil_long]

When that fuse blew on me it was definitely my control module.  Got one from nos4gn and havent looked back since.

[phil_long]

i actually have one you can try if you want me to send it to you. let me know

[SuperSix]

Phil's growing up!  Whooo!

[phil_long]

Phil's growing up!  Whooo!

Lol

[larrym]

Thanks for the offer Phil where are you located?


I tested the coil it appears good I cleaned all the connections and will give it a whirl tomorrow.


Might have to consider the new Bob Bailey module always wanted a 2 step rev limiter 

[phil_long]

Im in St. Louis Mo Larry.  Just let me know. I could ship via UPS

[larrym]

well a buddy had a known good module from a code 42 episode that turned out to be bad grounds.
Put it in tonight and something sure changed! It went very rich on start up but settled down after a bit. Drove it around and my block learns dropped by about 8 cells decided to go WOT and see what happened had the boost set to 18 PSI 02s went 10.0 and it bogged way down. So obviously its getting to much fuel but how does the ignition module affect fueling?

[phil_long]

I want to go out on the limb and say that it doesnt? But im just guessing. I would re-check FP, lean it out until you get your O2's lower. I didnt know that the O2's could read that high. My car has been drowning in fuel since I replaced the fuel pump and installed a hotwire kit. I couldnt get my O2's lower than 850. 

[Steve Wood]

It does not other than perhaps indirectly.  If you have a couple of cylinders firing that were not firing before, then you may have been over compensating with fuel before because the two dead cylinders were distorting the results....

What does it mean your blms dropped by 8 cells?

[larrym]

my block learn went from 128 at idle to 120 not so much while cruising down to 127 from 132.


the 02 readings are of my wide band.


This had me pretty confused I would have thought that weak spark or timing that was off would have caused a rich condition. I'll keep investigating this weekend but opinions are welcome I would like to understand why changed.


When I was at the track I had to pretty much max the fueling on my chip to keep the air fuel below 11.0. I checked my pump and regulator but they appeared fine.

[Steve Wood]

Okay, so a blm cell dropped 8 numbers...

In theory, that should still be in an acceptable range as it is well within the ability of the ecm to correct the fueling to the desired point.

What chip are you running and what boost was it burned for?  If it is a closed loop chip running off feed back from the wideband, then it should have met the a/f you had programmed in.  If a/f is not being controlled by the wide band, and the chip was burned for higher boost than 18, then you would expect it to be pig rich at wot.

Also, are the maf numbers correct at idle?

[larrym]

Its a TT chip no wide band correction. Maf numbers seem good I changed the sensor in the spring.


would an intermittent misfire account for this?