Knock Count/Problems

[SeattleSy#1255]

I've got some major knock problems, up around 14 degrees of retard. When i use my 3 bar MAP with 3 bar chip, I get this amount of knock with a 15lb boost fueled up bin. I of course can't continue tuning untill this problem is solved.

i throw on my stock 2 bar chip with 2 bar MAP sensor and i get a continous cycling of the "knock count"...it never stops and I get massive knock just reving it in my driveway.

all ignition components are new. I'm not understanding why i can't thow on my stock chip and MAP sensor and drive.

I am not hearing this 14 degrees of spark retard at all and I would think with that much, i'd hear it pinging with my own two ears, but maybe not? I even brought my brother along with his head sticking out the window to try to hear anything audible, and nothing was heard.

my two questions are:

1) why does the 2 bar stuff no longer function whatsoever?
2) what grounds should I be looking for that could be potential problems?

any advice would help, as i'm at a loss of where to go from here.

 

[leroy]

Are you swapping the 2 bar MAP sensor back in?

Jim

 

[bezerk]

if it starts counting knock while idling, you might take a look at the chip.
maybe it's not seated in correctly?
did you also erased the codes?

 

[typhooey]

hey chris if your reading this post would this be the same problem that im having and is this a possability for me to correct im not sure.

 

[SeattleSy#1255]

i erased all codes, triple checked the seating of the chip, and yes 2 bar MAP is swapped with stock chip.

i have an idea and i'll let ya know if that is what the problem is.

 

[SY2932]

How is your fuel pressure? I kept getting knock in my daily driven S10 and kept retarding my timing to keep it in check. This was the audible knock variety, sounds like rattling bolts around in a coffee can :-? . Turned out to be the fuel pump dying make it run lean... Got to repair that out of state the first day of the new year at my bud's house. Good thing him and I have done several fuel pump swaps and it only took 30 minutes to do :lol: . When was the last time the fuel filter was replaced? Have you also rechecked your timing as well?

 

[SeattleSy#1255]

fuel filter is a month old...the walbro is 3-4 years old or 20,000 miles or so i'd guess.

timing i need to check, but my concern is that its not autible...i can't hear it and i would think you'd hear 14 degrees of knock retard right?

 

[odium]

I've only been browsing these forums for about 4 months now, but the symptoms you're describing have usually been related to one of the following in the past:

- Bad ECU
- Chip seated improperly
- Bad ground or connection to/from ECU
- Chip malfunctioning (Not in your case, since stocker isn't working either)

Make sure your ECU is still good and make sure all connections to/from it are alright. I remember seeing it laying on the ground, so make sure the wires haven't been rubbing on anything.

Just some suggestions that I know you already know.

 

[ZavzTy547]

>continous cycling of the "knock count"...it never stops

Big Jeff.

Does it cycle count without the engine running (just the ignition turned on)?
If it does, I'd check for a faulty knock sensor and do what Ben and the other peeps suggested...

If that's not the problem then check your timing, if the timing hasn't moved then don't adjust it, refer to your SYTY syllabus, chapter 7 troubleshooting and diagnostics and get a tuneup
:drinking:

 

[Sy769]

Definitely check that the chip is seated in the ECM correctly.

Run through the service manual tests.

 

[crashing_sux]

Are you running any type of adapter between your chip and your board? I had this problem last week when I put my Moates G3 adapter in because I didn't properly piggyback my stock chip onto the adapter.

 

[SeattleSy#1255]

I think it may be i'm running open loop with a WB02. I got another problem that i'm working on and its timing related. If i get that solved, i'm hoping that perhaps it was the cause of my knock as my timing was off.