[Bex]

Much of this is completely beyond me but presumably your upstream o2 sensor needs to be switching between .1 and .9v - it should not remain below .5v.....
Is your '97 1.8 FSM' not just the regular 97 Sidekick FSM with the Sport supplement?? If so, it should list the location of the grounds. The ground locations for the 96 - which should be the same for you - are listed here starting on page 13:
http://www.acksfaq.com/96-FSM-v2-8A-14_pdf.htm

 

[aquanaut20]

This is what the B1S1 should look like, actively switching

 

[magician35]

This is what the B1S1 should look like, actively switching

That's about what it looks like but I'll take another look at the values. I don't understand why the downstream never moves off .3v. Malcolm

 

[magician35]

Much of this is completely beyond me but presumably your upstream o2 sensor needs to be switching between .1 and .9v - it should not remain below .5v.....
Is your '97 1.8 FSM' not just the regular 97 Sidekick FSM with the Sport supplement?? If so, it should list the location of the grounds. The ground locations for the 96 - which should be the same for you - are listed here starting on page 13:
Ack's FAQ: Your 4X4 Portal To All Things Suzuki/Geo

Thanks. I have the '96 supplementary Service Manual for the 1800 and the '97 but don't have the '96 Sidekick/X-90 1500 FSM. Malcolm

 

[Rhinoman]

Once the exhaust gasses have passed through the cat the gasses should be relatively 'clean' so the O2 sensor will show a fairly steady signal, if it starts oscillating then the cat is not working.
On my Jimny the downstream sensor is biased a little and shows 1.25V cold, dropping to around 0.7V when hot.

 

[Bex]

Thanks. I have the '96 supplementary Service Manual for the 1800 and the '97 but don't have the '96 Sidekick/X-90 1500 FSM. Malcolm

If you are only working off of the supplement, the rest of the FSM should be helpful for you - although possibly not with your current issue. The entire 1996 Geo Tracker FSM is free to download or view over on Acks FAQS:
Ack's FAQ 1996 Geo Tracker Factory Service Manual

 

[magician35]

If you are only working off of the supplement, the rest of the FSM should be helpful for you - although possibly not with your current issue. The entire 1996 Geo Tracker FSM is free to download or view over on Acks FAQS:
Ack's FAQ 1996 Geo Tracker Factory Service Manual

Thanks for the link to the manual. It will be useful. I can post links to sections of the 1.8L '96 and '97 supplements if anyone is interested. (Does anyone else actually own and drive a '97 Sport?)

Anyway, we're on hold for a few days. The upstream O2 is totally dead. On the car, it just occasionally throws a voltage spike around .5V. Off the car, heating it with a torch produces no voltage that the digital meter can see. So, it's back to Rock Auto for more parts. Their sensors come from a warehouse about 150 miles away and they still take a week or more to get here. Malcolm

 

[Bex]

Hopefully the replacement o2 will sort out your issue. And the forum does get Sport owners occasionally, most of whom have difficulty finding the Sport supplements, so if you have links to them, it would probably be appreciated!!

 

[70667]

I also have a '97 Sport and find this thread very informational. I travel frequently and am not near my Sport to assist with any data.

Could the cracked exhaust manifold be causing some of the problems? It is a very common problem with 1.8 engine.

 

[magician35]

I also have a '97 Sport and find this thread very informational. I travel frequently and am not near my Sport to assist with any data.

Could the cracked exhaust manifold be causing some of the problems? It is a very common problem with 1.8 engine.

It's good to know there's another one out there!

I have thought I've heard an exhaust rumble but can't feel anything around the manifold. I've tried propane and will do it again after the O2 sensor is replaced. It looks like at least the manifold gasket has been replaced; It looks new. Some of he bolts were loose when I got it.

 

[Rhinoman]

Could the cracked exhaust manifold be causing some of the problems? It is a very common problem with 1.8 engine.

Yes it will cause a false reading from the O2 sensor and the ECU will ramp up the fuelling causing it to run very rich.

 

[aquanaut20]

Could the cracked exhaust manifold be causing some of the problems? It is a very common problem with 1.8 engine.

Connect a Live Data Scanner, check the fuel trim (STFT and LTFT), they should be as close to "0" as possible..

Also check the O2 (B1S1), for swift switching .1-.9vdc with no bias...

... Philip

 

[magician35]

Yes it will cause a false reading from the O2 sensor and the ECU will ramp up the fuelling causing it to run very rich.

What's the best way to check for a manifold leak?

 

[Bex]

Look under the heat shield and around the manifold with a bright light.
Listen with a mechanic's stethoscope.
Or the best is a smoke machine. Here is instructions for Aqua's homemade one - although he may have improved on it (again).
http://www.suzuki-forums.com/suzuki...om/suzuki-sidekick-escudo-vitara-geo-tracker/36974-should-i-buy-sidekick-4.html

 

[magician35]

Connect a Live Data Scanner, check the fuel trim (STFT and LTFT), they should be as close to "0" as possible..

Also check the O2 (B1S1), for swift switching .1-.9vdc with no bias...

... Philip

I've gotten mixed results with Fuel Trim. The scanner has values for B1 short and long term FT. Then short term for B1/S1 and B1/S2 separately. ST B1 has been something like zero at idle, spikes to 19 if the throttle is advanced but comes back to zero if the rpm is held constant. LT B1 last time was -3.1 at idle and -2.3 with the idle pushed up and held.

ST B!/S1 zero at idle, constant 19 at advanced RPM then zero back at idle. ST B1/S2 -1 at idle, no change with RPM. I'll see how those change with the new B1/S1. Malcolm

 

[aquanaut20]

Look under the heat shield and around the manifold with a bright light.
Listen with a mechanic's stethoscope.
Or the best is a smoke machine. Here is instructions for Aqua's homemade one - although he may have improved on it (again).
http://www.suzuki-forums.com/suzuki...om/suzuki-sidekick-escudo-vitara-geo-tracker/36974-should-i-buy-sidekick-4.html

As a matter of fact, yes! I now have a new and improved model... Last one was loaned out and it grew legs (evolution theory).

Spray paint jar (metal),
110vac, pencil soldering,
Input: M style male connector and,
output: 1/4" air connectors + hose.

... Philip

 

[magician35]

As a matter of fact, yes! I now have a new and improved model... Last one was loaned out and it grew legs (evolution theory).

Spray paint jar (metal),
110vac, pencil soldering,
Input: M style male connector and,
output: 1/4" air connectors + hose.

... Philip

Can you give some more detail about the construction and use of the smoke machine?

Malcolm

 

[aquanaut20]

Can you give some more detail about the construction and use of the smoke machine?

Malcolm

I shall try to get out to the shop in the next week, I will then post some pics... and do a write-up..

Immobile right now.. In the mean time, this is a teaser...should answer your questions.

https://www.youtube.com/watch?v=HPg81Ot5t0Q
https://www.youtube.com/watch?v=fBfJykur3Pg

... Philip

 

[Rhinoman]

The scanner has values for B1 short and long term FT. Then short term for B1/S1 and B1/S2 separately.
Malcolm

Does it show PID numbers? one of the issues with cheap scanners is that they don't differentiate between different PIDs. Is it showing those values as % or voltage?
If you have an ELM tool then you can pull the lists of supported parameters as raw data and then cross-reference that against the specs.

 

[magician35]

Does it show PID numbers? one of the issues with cheap scanners is that they don't differentiate between different PIDs. Is it showing those values as % or voltage?
If you have an ELM tool then you can pull the lists of supported parameters as raw data and then cross-reference that against the specs.

I'm still learning how to use my scanner but do have individual PID's and access to the raw data. I'll go through everything again after I get the new B1/S1 in. Am also going to test the Engine Coolant Temperature sensor today.

This all started with no IAC action which turned out to be a fried ECU. After I replaced the ECU and got the IAC working, I noticed that the IAC was running pretty hot. I guessed it was because the duty cycle was too high. Not sure how to measure the duty cycle with what I have, I opened up the bypass needle and the IAC cooled right down. I continued to open it until the idle sped up (IAC no longer could compensate) then closed it until the IAC had control again. It runs cool and the idle control is as it should be. It should be close to the 50% duty cycle called out. Does that make sense?