07-19-2020, 07:21 PM
CEL light ok on power-on engine stopped. All lights go away on startup. I read error codes at spring just ok (code was if I remember ok 13 - bad O2 sensor).
I have recently changed (related to points you said):
- spark plugs, RAD, fan clutch, STAT (190F), O2 sensor
Engine runs very stably without vibration unless I remove the plug from booster's vacuum hose. When I do that, it vibrates a bit until it ups RPM to 1400-1500 no vibration then. When I put the plug back it drops to 1200rpm, no vibration.
My fuel usage was on fast paved road travel about 8,3l / 100km (around 28mpg) and when driving only 80-90km/h (50-55 mph) it was around 7,5l/100km (31mpg). So I am guessing spark is ok, so is lambda and not in limp mode. Also it feels that all power is present. I did drive 130+kmh (80mph+) on motorway so definitely all power is present as its about the suzuki spec topspeed.
I think my ISC is busted, but before clutch replacement hot idle was 800RPM and when putting lots of electrics on it went down 600 RPM. But this high idle of 1200 RPM started after clutch replacement and some welding done on back of the frame (they had to drop tank).
So my best guess is that when tilting engine and doing other stuff some very bad rubber hose broke a bit.
One thing I have noticed. WHen engine is hot (STAT open) and I press lightly throttle, RPM goes slowly upto 2500 and then drops to 2300 and then it does that 2300->2500->2300... for ever until I press more throttle. Some strange cutoff error there. I guess the EFI changes mode there and gets confused.
So anyhow I think I will first just change all the hoses as they are anyways going to break very soon. Then if the problem persist, check other things.
I fear that some previous owner has done a lot of nasty things there. There are DIY electric fixes here and there, like they had at somepoint bypassed the fuel pump relay and then switched back to the relay. ALso could be that somebody has tampered with the EFI "do not touch nut".. as the HOT side knob for tuning something (that has AISIN brand text there) is broken off. Cold side knob exists.
So the car is bit of a mystery.
I have recently changed (related to points you said):
- spark plugs, RAD, fan clutch, STAT (190F), O2 sensor
Engine runs very stably without vibration unless I remove the plug from booster's vacuum hose. When I do that, it vibrates a bit until it ups RPM to 1400-1500 no vibration then. When I put the plug back it drops to 1200rpm, no vibration.
My fuel usage was on fast paved road travel about 8,3l / 100km (around 28mpg) and when driving only 80-90km/h (50-55 mph) it was around 7,5l/100km (31mpg). So I am guessing spark is ok, so is lambda and not in limp mode. Also it feels that all power is present. I did drive 130+kmh (80mph+) on motorway so definitely all power is present as its about the suzuki spec topspeed.
I think my ISC is busted, but before clutch replacement hot idle was 800RPM and when putting lots of electrics on it went down 600 RPM. But this high idle of 1200 RPM started after clutch replacement and some welding done on back of the frame (they had to drop tank).
So my best guess is that when tilting engine and doing other stuff some very bad rubber hose broke a bit.
One thing I have noticed. WHen engine is hot (STAT open) and I press lightly throttle, RPM goes slowly upto 2500 and then drops to 2300 and then it does that 2300->2500->2300... for ever until I press more throttle. Some strange cutoff error there. I guess the EFI changes mode there and gets confused.
So anyhow I think I will first just change all the hoses as they are anyways going to break very soon. Then if the problem persist, check other things.
I fear that some previous owner has done a lot of nasty things there. There are DIY electric fixes here and there, like they had at somepoint bypassed the fuel pump relay and then switched back to the relay. ALso could be that somebody has tampered with the EFI "do not touch nut".. as the HOT side knob for tuning something (that has AISIN brand text there) is broken off. Cold side knob exists.
So the car is bit of a mystery.