More knock- datamaster

[graham1524]

Re: More knock- datamaster

DM file indicates running in closed loop at WOT. Should be open loop. Is this a stock chip?

After quite a bit of reading on here if the Sterm goes to 128 then it is essentially open loop even if it is not stated as open loop. Thats what apperas to happen but i will still verify the chip when I can

 

[johnboy89]

Re: More knock- datamaster

I can double check the chip tomorrow. What exactly am I looking for to verify that it is a stock chip?

Have you verified the chip yet???? Take a pic of it and post it up!!!

 

[dgoodhue]

Re: More knock- datamaster

The stock base fuel pressure is 42psi. If you raise the fuel pressure and the spark retard gets worse I would think that the fuel pump is he problem. Did you buy your walbro from a reputable source?

 

[graham1524]

Re: More knock- datamaster

Here's a picture of the chip

 

[WyoSyclone]

Re: More knock- datamaster

Looks like you've got some KR that starts upon wheelspin.. the boost launch at rec# 3698 shows a bit of wheelspin then some KR.... maybe some bad motor mounts?? Could be something else rattling (downpipe, etc.). Looks like you did a rev to get vacuum up to hold the brakes and got some KR there as well, with no boost. I'd say you've got something loose/rattling.

Get that fixed and then see what happens.

 

[graham1524]

Re: More knock- datamaster

Looks like you've got some KR that starts upon wheelspin.. the boost launch at rec# 3698 shows a bit of wheelspin then some KR.... maybe some bad motor mounts?? Could be something else rattling (downpipe, etc.). Looks like you did a rev to get vacuum up to hold the brakes and got some KR there as well, with no boost. I'd say you've got something loose/rattling.

Get that fixed and then see what happens.

I did notice that on one of the boost launches i was able to build 5.2 pounds off the foot brake but the second i start moving it starts pulling timing due to knock. Before I started Driving it I replaced the motor mounts and transmount. I checked the fuel lines banging on the trans tunnel and i didnt seem that they were banging around. How can I test and see if it is the downpipe?

 

[midnightbluS10]

Re: More knock- datamaster

Here's a picture of the chip

Looks stock to me. IIRC, AYBM is a stock chip.

 

[graham1524]

Re: More knock- datamaster

Looks like you've got some KR that starts upon wheelspin.. the boost launch at rec# 3698 shows a bit of wheelspin then some KR.... maybe some bad motor mounts?? Could be something else rattling (downpipe, etc.). Looks like you did a rev to get vacuum up to hold the brakes and got some KR there as well, with no boost. I'd say you've got something loose/rattling.

Get that fixed and then see what happens.

At rec# 420 it is pulling timing but no knock was recorded for knock8 or 16 and at rec# 835 it pulls less timing and the knock16 goes up but knock8 does not. Also, at rec# 1106 there is no timing being pulled but both knock counts go up Can anyone explain to me what that could mean?

 

[The Bronze]

Re: More knock- datamaster

You don't have to go around pleasing me, but it sure is nice to see a file that starts cold and warms up fully and then just a couple of pulls and a coast then idle. It is just too easy to overlook a basic problem if you just jump into driving it. It's easier on the tranny to boot. If there is an intermittent problem, then by all means make a large file (and note the locations of interest).

With that said, the first thing I noticed with your last run was the Baro is 25.3 (on 2 bar) you can't be that low can you? Low elevation- or is my DM just playing tricks on me? If indeed that is what your ECM is seeing, it will certainly start playing games with you. More timing at all loads to start with....

If you guys are seeing something different, let me know otherwise, you need to be starting with your load sensor (MAP).

 

[graham1524]

Re: More knock- datamaster

Went through and did a lot today.

Timing is correct
Found a line touching the oil pan that i insulated so hopefully that helps

I found that the downpipe is touching the number 6 exhaust manifold. There is also a bracket welded to the downpipe but i could not find somewhere that it could bolt to.

What can i do to get them to not touch?

 

[dgoodhue]

Re: More knock- datamaster

Your probably missing that downpile brace that bolt to the 2 bell housing bolts. Do you have the rear catalytic conv bracket?

 

[graham1524]

Re: More knock- datamaster

I'll revive this thread again today since I had a chance to pull the spark plugs.

For the amount of knock it says im getting they don't look bad (I think). But I would like some opinions of people with more experience

 

[Don W.]

Re: More knock- datamaster

Lower picture, right hand plug. (Why is it not brown like the rest?) Needa better pic. Actually more than one. 1) like whats there only better lighting, 2) flip it over so we can see the ground electrode. 3) and maybe one looking down on the plug.

 

[canadian]

Re: More knock- datamaster

you might have posted it, but what kinda plugs are they?

 

[graham1524]

Re: More knock- datamaster

you might have posted it, but what kinda plugs are they?

Those were the only pictures i took before they went back in so I could move it. I had wiped the one in question just a tad before i realized it cleaned it.

The brand is ur5 v power I'm pretty sure

 

[Don W.]

Re: More knock- datamaster

Those were the only pictures i took before they went back in so I could move it. I had wiped the one in question just a tad before i realized it cleaned it.

Well if that's the case then I think they look pretty good.