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1995 Tracker LSI 16v MPI starts, runs for 2 to 4 seconds then dies - 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: 1995 Tracker LSI 16v MPI starts, runs for 2 to 4 seconds then dies (/thread-1995-tracker-lsi-16v-mpi-starts-runs-for-2-to-4-seconds-then-dies) |
1995 Tracker LSI 16v MPI starts, runs for 2 to 4 seconds then dies - Happycampsterers - 08-20-2016 I have done the following troubleshooting test to help identify what is causing this Tracker to stop running shortly after it is started. It will run for 2-3 seconds (sounds strong, no miss). Yes it was a barn find, not running for over a year, blown head gasket, repaired 150 psi in all cylinders cold...Cat was completely clogged..exhaust path clear now.. Fresh fuel and filter, cap, rotor and wires.. Fuel pressure at filter 38 psi with good volume. Fuel pressure at rail 38 psi. Clean fuel injectors all 4 pass spray test, and NOID test when running at start. Hot foot helps, engine will continue to run with test fuel... TPS-pin 2 @ 50 ohms throttle stop, infinity @ slightly open throttle pin 3 @ ~ 1K ohms throttle stop, increases linearly to ~ 4k ohms pin 4 @ ~ 5k ohms DTC jumper in gives code 12 and DTC jumper out CEL comes on @ key on and goes off after start. All pins back probed @ ECU tested out accordingly with the "92-95 1.6L 16v ECU static test USA/Canada OBD1" data provided with this site (THANK YOU!) with the exception of pin B12, this pin at ECU is always 0v. Static test data says it should be B+ key on and B+ to 0v running varied by throttle position. Is this a bad ECU? Or is the issue downstream of this output? How do I troubleshoot this condition? RE: 1995 Tracker LSI 16v MPI starts, runs for 2 to 4 seconds then dies - fixkick - 08-20-2016 WELCOME ! 95 G16B (08-20-2016, 01:56 AM)Happycampsterers Wrote: I have done the following troubleshooting test to help identify what is causing this Tracker to stop running shortly after it is started. It will run for 2-3 seconds (sounds strong, no miss). (but what does it do , tried again, now?) run 2second? when you cut the throttle you never want to go to zero air supply, this too is a feature. Hot foot helps (what does that mean?) it has 3 anwers. 1: easy and can keep engine running full time this way. 2: hard, 3: impossible. hard, can be 3 things, gross misfire, EGRs stuck open (cat missing?) or too lean to run,. or black spark plug tips, x4? called flooding. when engine stalls, are plugs black? or bone dry white. or soaking in fuel why only 150psi, are you not at sea-level, all mine do 180 min. and up to 195psi hot. (cam timing one tooth off, is bad.) yeah cold can be lower,,, sure. must be cold. best is do it warm or hot. but its moot point if not bad. conclusions seems what. engine ok. sparks ok fueling bad (rich or lean , not known) not ISC because hot foot fails to take command so is not loss of AIR. CEL flashs 12s at stall, you can drive a week with code 12s flashing so , just keep the jumper there, until engine efi runs right. is best deal. runs on test fuel ,this real gas or instant start in a can, as the later can clear flooding and fool the tech. check spark tips, read them. at stall. The ecu will not cut injection , unless it sees spark fail. (cmp fail) with codes 41 or 42 the software cuts all fuel, NOW. cranking has other rules, when cranking you can open the throttle 100% and the ECU cuts fuel, w my guess is , injectors , cut fuel or they are flooding it. (just one or all 4 is clue too) knowing which it is , is the cause and solution.. keep the jumper in, the DIAGNOSTIC PIN ,at stall. see if cel flashes bad codes. then,..... this is super easy to do. all this assumes good fuel in tank, pump,lines and injectors. RE: 1995 Tracker LSI 16v MPI starts, runs for 2 to 4 seconds then dies - fixkick - 08-20-2016 questions, the injectors were professionally cleaned in that the 10 micron screens inside were back flushed,? using ultrasound is top way., all barn founds, the screen are full of junk, packed. or 3/4s packed allowing start and die. they only need to flow at 10hp flow rates to idle. keep in mind cold starts use a crude rich fuel mix , cranked, this can hide partially clogged injectors, until it runs , goes lean and starves , in idle mode. |