1997 vitara

[fixkick]

hi, i have a suzuki vitara 1997 manual g16b, my car is running super rich and i think is running in limp mode. I have replaced the fuel injectors, the fuel pressure reulator ( the old one had fuel coming out the vac hose) , replaced the ecu and oxygen sensor. still nothing changed. Removed the exhaust mainifold and found the no 4 pipe cracked, almost completly around, replaced with extractors. changed plugs, leads, dizzy cap and rotor. checked timing with freeze pin. there are no diagnostic codes. checked egr it was clean. could anyone have any suggestions what else colud be making the car run in limp home mode. The car just started running the way it is. thanks

so key on ,  CEL lamp glows.?
the start the engine, and cell lamp goes out?. yes, good, no bad.
if no bad, scan the PCM/ECU eva the 16pin DLC connector at right knee location, all USA cars have this connector, this is a USA car right? unstated.
there are many causes of Rich running.  here is list.
1: yes in limphome, scan it to see what is dead.,  always the first thing to do/
2:o2  SENSOR DEAD (crack above #4 causes this ) but you can unplug it and see if engine runs better, if yes, O2 is bad, but you didnt scan the PCM yet
O2 is new,now so.. checked off.
3: top failure is FPR bad fuel pressure  regulator,most of them this old are bad or close.  fuel pressure now super high and runs rich,  also test fuel pressure first before blaming injectors, or pump.   if the pump shunt test passed fully test the FPR< key pressure and idle pressure must be 6PSI different,  lower at idle.

fuel pressure spec is here.
factory spec.
shunt test is about 55 to 60 PSI, this is with hose to FPR blocked and pump driving directly to only one think the pressure test, keep test short time.

yours was bad , vac hose leaks fuel is bad but getting a good new FPR can be hard, or using the wrong one, so we always check pressure proving we DID THE JOB RIGHT. who knows now with fake parts sold.?
off my pump page. pressure.
96-98 16v FSM specifications Rail  pressure:  (pg.6E3-A-36-37) 

Static:      36-43 PSI, keyon, not started ( you may have to key on 3 times to build enough pressure, pump runs on 3 seconds)
Running: 30-37 PSI , idling.
Residual :25 PSI , after 1min.  drop test. (key just turned off , time to drop PSI) or better ,more time is better.

the FPR is vacuum operated and must work right or no ECU can injector correctly out of  spec.  
redux 1: you be in Australia. not USA we are USA. and you do not have a OBD2 car, unless bought here and shipped to your country. as some have done. the TAB below tells me what you have.
market E24 is Australia.


is your car outside USA or bought new outside, if there is no hood sticker and only firewall plate to drivers left it is not USA car.
like this car.
they even made Santana Vitara's in Europe. and many more else where, and very different some.  (and is not , redux2)



if outside USA , use the DLC jumper wire test, diagnostic, ("test switch terminal"  code 12 means ok. other codes are all mostly limphome.
https://fixkick.com/CEL/DLC/DiagJump.html
USA cars are OBD2 and scan tools work on our cars all do.

no scan tool OTC works on any pre  96 in USA. none.(over the counter) only the jumper wire test. here. and same in other counties, just a jumper. works.
https://fixkick.com/CEL/DLC/DiagJump.html