I have a 1987 GN my set-up consists of ATR 3" downpipe, ATR 2.5 inch exhaust, 160 degree Thermostat, Walbro 307 fuel pump, Hot wire kit, adj. fp reg., stock injectors, stock turbo,stock IC, 45# fp static, and Thrasher 92 chip. My car is running 14-15# of boost and showing up to 5.6 degrees of spark retard. Here are the turbolink numbers:
Index (Frm) IAC CLTF MPH LV8 RPM TPS INT O2V CF AM LC MIX LPS MAF PN PS AC TCC 3RD 4TH ESC# BLM O2X# RTD MAP/BOOST BATT EGR%
+0:48 ( 39) 102 157 29 255 3250 4.14 128 82 N N N L O 234 N N N N N Y 0 128 4 0.0 12.0 PSI 13.6 0
+0:50 ( 40) 102 157 41 255 3700 4.14 128 671 N N N R O 238 N N N N N Y 2 128 13 0.7 11.5 PSI 13.7 0
+0:51 ( 41) 102 157 52 255 4350 4.10 128 414 N N N L O 241 N N N N N Y 2 128 40 0.0 11.0 PSI 13.8 0
+0:52 ( 42) 102 157 63 255 4200 4.10 128 421 N N N L O 208 N N N N N Y 4 128 32 1.4 11.0 PSI 13.8 0
+0:53 ( 43) 102 157 72 255 3700 4.02 128 660 N N N R O 218 N N N N N Y 7 128 19 1.9 11.5 PSI 13.8 0
+0:55 ( 44) 102 158 78 255 4000 3.92 128 699 N N N R O 230 N N N N N Y 8 128 0 2.8 11.5 PSI 13.7 0
+0:56 ( 45) 102 158 86 255 4200 3.96 128 687 N N N R O 239 N N N N N Y 12 128 0 5.6 12.0 PSI 14.1 0
+0:57 ( 46) 102 159 91 116 3500 0.42 128 558 N N N L O 45 N N N N N N 14 128 31 0.7 12.0 PSI 14.3 0
+0:58 ( 47) 90 161 88 54 2600 0.42 128 550 N N N R O 17 N N N N N Y 14 120 55 0.0 12.0 PSI 14.2 0
+1:00 ( 48) 78 162 85 18 5050 0.42 128 0 N N N L O 8 N N N N N Y 14 120 3 0.0 12.0 PSI 14.3 0
Sorry, about the format. I am aware that the O2 numbers are low. I have increased the fp to 50# but I still get some spark retard. HELP!!!
TPS is way low .. fix that and then retest and see if that helps...
I’m back! I’m sorry that I have not responded to the e-mails and posts that I received. But my car has been in and out of the shop so I didn’t really have chance to try them. Anyway I reset my TPS and IAC. TPS is currently set at .42 idle and 4.72 WOT. Here are the problems the car hesitates between shifts, I get between 5 – 10 degrees knock on 93 octane, and the vacum line is blown off the FPR. I mixed in some 117 octane and the knock decreased to .7. Here is a list of items on the car and the numbers from tlink with the race gas mixture.
Rebuilt engine, new valve springs, 2800 stall converter, 3” dp, adj. Fp reg., 2.5 atr exhaust, walbro 307 fp, hot wire kit, rebuilt trans, vdo boost gauge, Thrasher 92 fp set at 45 static, ac43rt spark plugs gapped at .035, and I’m currently running 12 psi boost.
1 2 3 4
Tps: 4.52 4.52 4.24 3.68
Int: 128 128 128 128
O2: 816 46 710 738
Maf: 98 203 220 224
Blm: 128 128 128 128
O2#: 1 3 1 2
Mat: 73 79 82 82
Rpm: 2250 3700 5200 5600
Esc: 2 2 2 2
Egr: 0 0 0 0
Lv8: 154 255 224 203
HELP!!!
HELP! see the previous post.
TPS is still low, the car is shifting pretty high (5600 is wrapping it pretty tight for a stock headed car. the O2 cross count should be steady at ZERO during WOT ... cross counts indicate some sort of lean drop out.
Ken, I've filed the grooves on the TPS. With switch on TPS reads .44 idle - 4.72 WOT. I hooked up fp gauge taped it to the windshield saw fp drop off. I checked the fp reg. tightened the jam nut and fp seemed function correctly. But, I still get KR. The Tlink #'s I posted are from part throttle runs because I can't achieve WOT without getting KR.