just a little unclear on tuning

Mephisto

Mephisto

These trucks are cursed
thanks for the tips jeremy!
today i pulled my spark plugs to see what was goin on, and i noticed the plugs had one black spot on them about the size of a BB on every plug, the rest was a normal golden brown color. i then checked the gap on the plugs and noticed the gap was at .045!!!!
a big fuck you to the asshole at pep boys, who did me the favor of gapping my plugs for me.
anyway, i installed new plugs gapped to .032 and already i have noticed a pretty big difference. i need to do a couple DM runs to see if thats been my problem all along.
ive also got new plug wires on the way, and plan to install a KB cool air kit. as well as another new cap/rotor just to be safe. hopefully i can get this shit cleared up, and have my truck running like it should! running 14.2 makes me very angry! :evil:

one more question...
do you need to take anything off the truck when using the TEC? i remember reading that it can mess up the cat or the 02 sensor?
 
Tooky

Tooky

Serious about performance
Hey Neal I have good news and bad news. The bad news is that using TEC will probably foul the shit out of your plugs! It sure did on mine! A feeler gauge is very easy to use so if gapping the plugs is a problem, you could get a gauge and do it yourself. I dunno what to tell ya, you could put your old plugs back in and then do the TEC and then change the new ones in? Don't forget to change your oil immediately after the TEC.

The good news is my truck also had .045 plugs at one time (from previous owner) and putting new plugs at .035 made a huge difference. That and the basic tuneup stuff dropped me 9 tenths! From 14.22 to 13.36. I'm rooting for you and your truck to do the same thing!! :smile:
 
Mephisto

Mephisto

These trucks are cursed
good call on the TEC Josh!
i guess ill wait a lil while before i do it, since i just changed my oil less than 500 miles ago and just did the plugs... ill just toss in the old ones when i use the TEC.

12.9X is close... i can feel it :lol:
 
K

kwick6

Donating Member
On 2002-04-01 15:08, mrweelr wrote:
Hey Neal, sorry for the late response. I just saw this thread. Anyway, I'm in the same boat as you with only 91 octane crap available where I live. I have done TONS of shit to get rid of the big KR and I'm getting close. Basically, I'm getting under 5 degrees KR on 91 now and I only use Chevron or Shell these days. I did fill up with 100 octane racing fuel at the local Union 76 station in San Jose a while back and it worked well but I will still getting some KR, albeit very little. What I've done lately is just dump Xylene in the tank whenever I go out street racing. My truck runs awesome with that stuff in the tank but it's $35 for a 5-gallon drum so it adds up. I'm getting the SMC alky kit soon but I don't want to use it as a band-aid so I'm holding off until I've exhausted every option. Some things that I'm trying now are replacing the stock early MEMCAL with the updated unit from GM and replacing the original ignition module. I also want to clean the upper IC and clean all of the ground points but I don't know where they're all located. Here's what I've done so far:

RedLine WaterWetter $8
Mobil 1 5W30 synthetic oil $30
Mobil 1 oil filter $10
GM Transmission Filter $28
Mobil 1 synthetic ATF $50
GM Fuel Filter $20
AC Delco coil $30
Vacuum Fitting Kit $20
Redline Injector Cleaner(2) $19
RMI25 Cooling System Treatment $25
GM Top Engine Cleaner $6
Magnetic Engine/Trans Plugs $5
Derale Deep Transmission Pan $72
Kenne Bell Cold Air Kit $179
Kenne Bell Red Hots $50
Kenne Bell FPR @50psi $149
Kenne Bell TC Lock-Up Switch $15
ATR Chrome Diff Cover $40
Bob Berterman IC scoop $86
Powermaster 140Amp Alternator $147
ATR High-Flow Converter $200
ATR SS Exhaust $395
B&M Transmission Cooler $50
NGK UR6 Plugs $19
Borg/Warner Cap and Rotor $20
HotShot starter relay $29
ATR TB Airfoil $36
Walbro 255 Fuel Pump $114
Reroute IC Hoses 3/4" $10
Jabsco IC Pump (Hotwired) $132
Koni Adjustable Shocks $343
PST Front Suspension Kit $219
Kenne Bell 2" Lowering Blocks $30
Optima Battery $118
Hood Latch Guard $10
Engine Tie-Down $50
Disabled EGR $0
LoTek 2-Pod 2 1/16" $50
AutoMeter Boost Gauge $57
AutoMeter Electric FP Gauge $211
New MEMCAL #16164174 $50
New Ignition Module $45
New Oil Pressure Sender $30

The NGK plugs helped with KR a lot as well as the GM TEC. Getting your IC temps down will work wonders too. I will post more here after I get the new chip and ignition module installed and test it with Datamaster. Cleaning the grounds and intake are pretty much my only other options after that. It is possible that my original injectors (52K miles) are not flowing perfectly and causing some cylinders to run lean but I'm skeptical about that. When I do the PTE-52 turbo upgrade I will put the 50# injectors in there and kill two birds with one stone. That's about it for now.

_________________
Jeremy
GMC Syclone #434
Yamaha R1 #1525
http://geocities.com/jdonavich.geo


<font size=-1>[ This Message was edited by: mrweelr on 2002-04-01 15:13 ]</font>
Click to expand...

Jeremy,
I would agree that you have done almost everything in the book to rid your knock problem. After trying the last few things you have mentioned it could be to your advantage to relocate the knock sensor if it is still causing you problems. Keep a close eye on the plugs, and you should be okay.

Scott
 
mrweelr

mrweelr

New member
How do I relocate the knock sensor? Has anyone else done this? BTW, I've gone through 3 sets of plugs in 4000 miles and none of them have shown any sign of detonation despite the Datamaster readings. Could the knock sensor be bad (too sensitive)? I never though of replacing the sensor itself.

_________________
Jeremy
GMC Syclone #434
Yamaha R1 #1525
http://geocities.com/jdonavich.geo

<font size=-1>[ This Message was edited by: mrweelr on 2002-04-02 16:37 ]</font>
 
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