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Old 11-21-2012, 09:48 AM   #1 (permalink)
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Hello All! I'm new to Trackers, and not much of a forum guy, so bear with me if you can...

USA 92 Geo Tracker 1.6 8V 5 speed manual 4WD

Bought it a couple days ago and has LOTS of issues. The biggest thing is this: there is a carburetor on it. I'm quite baffled. Anyone know why this was done? The seller said the previous owner was going to make it a rock crawler.

It idles very high and has temper tantrums - it will suddenly bog down and cut off (cranks back every time, I can keep it going pumping the accelerator, but wont move), then idle returns and its like nothing happened. Power is low(I guess) and mileage is not great(25 I think).

So should I keep the carb and try to get it right (is it possible)? Or should I start making arrangements to go back to FI? My mechanic has it at the moment, I'm not sure what carb is on it, but here are some pics.
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Old 11-21-2012, 11:15 AM   #2 (permalink)
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Quote:
Originally Posted by Heatray View Post
Hello All! I'm new to Trackers, and not much of a forum guy, so bear with me if you can...

USA 92 Geo Tracker 1.6 8V 5 speed manual 4WD

Bought it a couple days ago and has LOTS of issues. The biggest thing is this: there is a carburetor on it. I'm quite baffled. Anyone know why this was done? The seller said the previous owner was going to make it a rock crawler.

Many hard core off-roaders prefer a carburetor because it requires no electronics (computer) to supply the fuel. When you are out in the middle of nowhere it is fairly easy to diagnose.

It idles very high and has temper tantrums - it will suddenly bog down and cut off (cranks back every time, I can keep it going pumping the accelerator, but wont move), then idle returns and its like nothing happened. Power is low(I guess) and mileage is not great(25 I think).

I'm thinking the carb may be maladjusted, needing a rebuild, not jetted correctly or too large. Back in my younger days (before FI), guys would put 650 or 750 double pumpers on because that was "bragging rights" and the car would not even get out of the garage. I'd tell 'em to put a 450 on and it would purr like a kitten. There is a method to determine the optimum size carb and jetting but I can't remember anymore.

So should I keep the carb and try to get it right (is it possible)? Or should I start making arrangements to go back to FI? My mechanic has it at the moment, I'm not sure what carb is on it, but here are some pics.
The car should run fine with the correct carb. I believe the computer is just along for the ride after the conversion unless the computer is controlling the spark. In my '89 the computer does not control the spark.

XXX can tell you how to get it back to FI. If you could somehow get in touch with the previous owner, he may still have the throttle body sitting in a corner of his garage. If he didn't butcher the wiring and cables you could hook it back up and start tuning.
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Old 11-21-2012, 12:21 PM   #3 (permalink)
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If the previous owner did the conversion hopefully you can get the EFI parts from him, if he still has them - you would need a number of the sensors (although I see that the EGR is still on the car), as well as the computer (ECU). If you stick with the carburetor, then all is old school - it would seem that your carb is out of adjustment. They are finicky creatures......
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'91 Tracker 8V, 1.6L, 5 sp, 4wd, 2dr, conv, CAMI, horribly rusty
'97 Suzuki Vitara 8v, 1.6L 5 sp, 4wd, 2dr, tintop, horribly purple
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Old 11-23-2012, 11:46 AM   #4 (permalink)
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are you in canada were they have gray market cars>? no location, so
i guess.

Quote:
Originally Posted by Heatray View Post
Hello All! I'm new to Trackers, and not much of a forum guy, so bear with me if you can...

USA 92 Geo Tracker 1.6 8V 5 speed manual 4WD )(doors)

Bought it a couple days ago and has LOTS of issues. The biggest thing is this: there is a carburetor on it. I'm quite baffled. Anyone know why this was done? The seller said the previous owner was going to make it a rock crawler.
what carb, they have names, weber,?
ill pretend say you are canada, and it has the carb changed
and the dizzy, so what dizzy is on there, it has a name and number.



It idles very high and has temper tantrums - it will suddenly bog down and cut off (cranks back every time, I can keep it going pumping the accelerator, but wont move), then idle returns and its like nothing happened. Power is low(I guess) and mileage is not great(25 I think).

So should I keep the carb and try to get it right (is it possible)? Or should I start making arrangements to go back to FI? My mechanic has it at the moment, I'm not sure what carb is on it, but here are some pics.
ok what picks?

lost power, , that dizzy , is first. no advance, no power
look at the advance in the dizzy. (they swapped in something) i see the vacuum can there... that is not stock for any tracker cept in 1989 (n.America, loc)
now you have advance. magic
now clean service and tune the carb.
easy huh?

the EFI runs better offroad (angles)
in fact it will run even broken, unlike any carb.
the ECU has limp home.
so only needs a good fuel pump.
it can run with TPS, and a dead map.
so carry a spare external pump as a backup.
or buy a new one every 5 years. (cut a hole like last poster did, for fast swaps)
ive played (vastly) with that 56b30 ecu, you can remove many sensors and it runs, with black cloud and low power, but runs.
really the go for 100,000 miles and no need for new sensors. at all the just keep working. the map never fails, etc, IAT
only pumps and filthy fuel takes it down (just like carbs.)

the 8v is robust too, and if the injectors stops ,its in plain view. just look. after that its easy
by a dash fuel pressure gauge. then most guessing ends.

i hope your harness is still there... and stock tank.... i me too hope the PO has the old parts

if not up to that get a CV carb , the Harely kit, i called it.. sold as kits for kicks.


the sammi dizzy is suffix 83030
i see the vacuum can there, so test the advance with a timing light first. see the strobe go off scale as you spin up to 3000 rpm.

Last edited by xxx; 11-23-2012 at 12:12 PM.
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Old 11-23-2012, 12:07 PM   #5 (permalink)
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dp....................

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Old 11-23-2012, 02:02 PM   #6 (permalink)
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wow. thanks for all the help you guys. its a relief to know i should be able to tune this thing. i cant find a number or name on the carb but havent tried very hard yet, getting ready to go home and dig into it now. take some better pics too. had carb adjusted a little, and a new muffler put on(cat conv still rattling), so it hasnt bogged down anymore, but still needs to be babied to stay cranked once in a while, then idles fine(though high). running a carb, can i cut the cat conv out?

im in the us btw.

cant wait to get home and take a look!
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Old 11-24-2012, 05:30 AM   #7 (permalink)
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Whether you can cut the cat out: First, you have an EGR system, which would depend somewhat on backpressure to work properly - normally provided by the cat. Plus, much depends if you have emissions in your state, etc., where they would look for a cat on your car.
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'97 Suzuki Vitara 8v, 1.6L 5 sp, 4wd, 2dr, tintop, horribly purple
'61 NSU Quickly - 150mpg
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Old 11-24-2012, 12:09 PM   #8 (permalink)
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no ecu , no nanny looking for cat.
the carb must be clean , the fuel clean
and the choke set right for climate.
and if running summer fuel, that be hard to sart now too. no state stated. so.>>>??
in Corpus Cristy or in Nome Alaska. all different deal.
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Old 11-24-2012, 01:22 PM   #9 (permalink)
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I believe that with or without an ECU, the EGR system will still keep the valves cooler and prolong the life of the car. Without the proper backpressure (possibly given from cat) the EGR modulator fails. However, I would imagine that just any stock muffler/resonator set up will provide the 1-2psi backpressure in order to keep the EGR working.
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'91 Tracker 8V, 1.6L, 5 sp, 4wd, 2dr, conv, CAMI, horribly rusty
'97 Suzuki Vitara 8v, 1.6L 5 sp, 4wd, 2dr, tintop, horribly purple
'61 NSU Quickly - 150mpg
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Old 11-26-2012, 03:37 PM   #10 (permalink)
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so far i have no earthly. i cant find any numbers, still looking though. the holidays set me back. the idling is really weird. bouts of little or no power, rpms run 700-2000, it SOUNDS right at about 1200. pics. im looking im looking. might i have to pull that joker off?
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