Geo Tracker OBD2 Readout - Printable Version +- Car Repair Forum (https://fixkick.com/forum) +-- Forum: Suzuki (https://fixkick.com/forum/forum-suzuki) +--- Forum: Sidekick/Tracker (https://fixkick.com/forum/forum-sidekick-tracker) +--- Thread: Geo Tracker OBD2 Readout (/thread-geo-tracker-obd2-readout)

Geo Tracker OBD2 Readout - sina27 - 06-30-2022 Hey guys, Need some help on my 1996 Geo Tracker, 2WD, 5 speed, 16 valve 1.6 MFI. I can get it to hot idle around 800rpm with the idle bleed screw turned clockwise all the way. I first suspected air leaks / failing ISC / Fast Idle AIR Valve -  Couldnt find any vacuum leaks. New ISC. Replaced the throttle body to test with another fast idle air valve. Still no luck.  The car emits high HC around idle so its making me fail smog.....something isnt functioning correctly.... I also just calibrated the TPS.  Got an OBD2 scanner, was wondering if you can take a look at these numbers and see if they are correct? These OBD2 values is from the car during HOT IDLE, ~800rpm: MAF: ~2.5 G/s Load: between 15-18% load TPS: 0% ECT: 190F Fuel System  1 Status: Closed Loop Fuel System  1 Status: n/a Spark Advance: Fluctuates between 5% and 15% Upstream O2: Fluctuates between 0.1V and 0.9V.  Downstream 02: sticks low around 0.035V. Only when driving around for a while it seems to stay static between 0.4-0.6V LTFT: between -7% and 5% SHOULD THE CALCULATED LOAD BE THIS HIGH AT IDLE? 15-19% SEEMS HIGH AT IDLE, CORRECT? WHAT COULD CAUSE HIGH LOAD DURING IDLE?  SHOULD THE TPS BE 0% AT IDLE? SOMWHERE ON THE FIXKICK PAGE, KICK SAYS HE GETS 5% AT IDLE??  If i turn the idle air bleed screw to a couple turns out the engine idles too high.  With the idle bleed screw turned in almost all the way, its around 800 rpm when hot. From a cold start, the rpms are 2000rpm, then down to 1500 within a minute, then down to 800rpm until fully warmed up (have to drive a couple minutes). Does this seem normal?  My fuel pressure is good. I rented a vacuum gauge, and from the plenum nipple I'm getting close to 25 inHG at idle. Is this too high? What could cause high vacuum at idle?  RE: Geo Tracker OBD2 Readout - fixkick - 07-11-2022 NO DTC both live and pending or stored ,right. your  data looks bliss. gee its in closed loop, is front 02 , new or new 50k miles go ,is good. Rear 02 only does CAT tests, so is not related to this. the bleed closed to make it run right proves vacuum leaks exist, even the brake booster can, so block its hose and drive only in home hood, and brakes have full power just takes more pressure to get to full braking do not let kid or wife drive car like that(booster dead) or  they will panic , per normal. (i taught my wife to drive with no booster and no power steering) 25 "HG is ok 20 is part but rpm matters too,  800= 25" first off sadly there vast ways to get a vacuum leak. finding some is a horror. the pinch hose tests are valid. PVC hose,  inspected for cracks FPR love to fain now,  see gas at vacuum hose removed it is bad FPR.  the fuel pressure  must vary 6PSI from keyon no start to start hot idle 800. must. on 16v car. or FPR is toasted. the IAC can leak,  the only way to  prove that  (thermal IAC) is to use clay and block its suck port in TB  air horn. it must be 100%closed at 150f UP,  for sure, no leaks hot or  idle controls fail and will go worse every day forward in  time. all vacuum hoses. skip none. good 5speed the 3speed vacuum modulator can no leak it is not there. but on engine swaps A/ T M/T  the wrong Intake man is there and the modulator nipple must not there not plugged correctly the EGR ,main can crack casing and leak,or its gasket or the left side of plenum (facing engine left) the egr sst side winder tube the SST gasket not missing, see it. off my vac leak pages this. drawing I made (crude) show all paths. the ecu is in closed loop and not in limp home mode so idle regulation  ISC is working. IAC leaks, MAF always leaks 100% its a pipe wide and huge. somebody messed the TV stops screw ( the newer touch white painted factory set screw)  I set it to 0.0005 " gap, 99.9%closed and is good. 100% is asking for TV jams. missing below are bad EGR cracks to atmosphere or VSV leaks. and brake booster. leaking air, on vacuum side. you have no 8v map,(well egr map can have bad gasket) the bleed sets idle duty cycle (ISC) to 50% ,  shows 7vdc  on the 2 ISC pins,  turn bleed to get 7v and puts it into the center of its dynamic  range of air flow ISCV. RE: Geo Tracker OBD2 Readout - fixkick - 07-11-2022 leakers.? losts IAC bottom. http://fixkick.com/IDLE-AIR/Slide_Show/HTML/image_29.html the injector cushions can leak too. the iAC trick is block point  fat arrow above 5. in the TB air horn. (I use clay or electric mastic putty) i think I got them all here. (intake MAN gaskets sure) to the left of TV  #5 is leak path. RE: Geo Tracker OBD2 Readout - fixkick - 07-11-2022 the load on on 16v (due to no map sensor) is based on MAF readings. it sees maf low , at idle and computes that + rpm to learn load. the car (ecu) is designed to be naturally rich running ( not to burn up valves) and the o2 sees the error and the ecu removes fuel to get closed loop burn. -7 means it removed that much fuel to get closed loop. not sure why, it goes (LTFT) to +5%,unless FPR is bad.