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post #1 of (permalink) Old 03-15-2000, 06:14 PM Thread Starter
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Rough idle

Hello All,
I have a question. Over the past few months, my Zuk has developed a rough idle. Between idle and around 2K RPM, it spits and sputters and acts like it's only firing on 3 cylinders. Above 2,000 RPM it runs fine. I have tried several things and everything seems to help some but doesn't totally fix the problem.

So far I have:

Adjusted valves, checked timing(about 12* BTDC), changed plugs/wires/dist.cap & rotor, cleaned carb, changed fuel filter, and changed EGR modulator(not the complete EGR, yet). But it still isn't running good! I have also noticed that the exhaust odor seems to be getting worse. Is there anything else I should try before completely giving up and swapping the engine out of my parts Zuk?

Thanks!

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post #2 of (permalink) Old 03-15-2000, 06:45 PM
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Re: Rough idle

You didn't mention that you checked the compression, have you?
just a thought.

Ford guy with twin rockcrawling Samurai's [img]/wwwthreads_images/icons/wink.gif[/img]
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post #3 of (permalink) Old 03-15-2000, 07:11 PM
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Re: Rough idle

Come on man, yours can't be running that bad. I saw you saturday. If mine run half that smooth, I would be in heaven... ha,ha lol... Don't know what to suggest. Since saturday, mine has gone down hill fast. Won't hardly run. Think I am finally going to put in the 1.6... Seriously man, I had a 88 hard top that had 81,000 miles on the clock. Had very badly burnt valves on #2 N 3. #4 was starting to burn pretty badly too. Hope this is not your problem though. Like rockcrawler said, check your compression. Hope you figure it out. C U on the trail man...

Later,
bb

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post #4 of (permalink) Old 03-15-2000, 08:41 PM Thread Starter
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Re: Rough idle

I haven't checked compression. Think I might have a bad valve? I felt that might be the problem, just wanted another opinion. I'll do a compression check and report my findings here. Thanks guys.

Billy Bob, It does run pretty good except for that slight sputter. I swapped that engine from a wrecked Zuk over two years ago. It's ran great until now. I still have the original engine which has a good head, bad rings though. Wish I had a 1.6L just lying around![img]/wwwthreads_images/icons/tongue.gif[/img]

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post #5 of (permalink) Old 03-16-2000, 03:40 AM
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Re: Rough idle

Suzuki Motor Samurai 87-88 computer feedback system test to check
this alert you to any problems
To do feedback system test:
1.turn cancel switch ON
2.turn ignition switch ON with out engine running
sensor light should light but NOT FLASH
After steady sensor light is confirmed
start engine warm it up to normal operate temp.
when engine is warm run engine 1500 to 2000 rpm
Sensor light should start flashing
FLASHING LIGHT MEANS YOUR VEHICLE HAS TESTED ITSELF ALL IS WELL
IF light fails to flash then you got problems need to fix or
replace bad parts SEE manual Checking feed back system



post #6 of (permalink) Old 03-16-2000, 07:05 AM
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Re: Rough idle

Hey Chris,
If you want, I will keep my eyes open for a good 1.6 for you. Maybe I will get lucky and find another tracker that is wrecked. There is one in ky for 700- ... Dont know exactly how much they will take for it cash??? It is a 87 or 88, so may have the 1.3... Says it has water in the oil. So who knows.

later
billy bob

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post #7 of (permalink) Old 03-16-2000, 11:03 AM
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Re: Rough idle

Sonds like you are familiar with zuks and so hope you don't mind if I mention a couple of obvoius things to check.

1. Maybe your mixture is off. See about fine tuning the mixture by adjusting the mixture control screw.

2. Maybe you zuk is suffering from a clogged or nearly clogged cat. This might be the cause of spluttering aka not breathing properly at low revs.



post #8 of (permalink) Old 03-16-2000, 01:28 PM
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Re: Rough idle

Which direction do you turn the mixture adjustment screw to LEAN it out some... clockwise or counterclockwise?

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post #9 of (permalink) Old 03-16-2000, 06:08 PM Thread Starter
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Re: Rough idle

Sure Billy Bob! I'd appreciate it if you did keep your eyes and ears open for a possible 1.6L donors.

Mud-Boy, I'll tinker with the fuel mixture and see what happens. I know it's not the Cadillac converter, don't have one of those to get clogged!

I'm almost certain that it's a burnt valve. If adjusting fuel mixture doesn't help, I'll check compression this weekend.

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post #10 of (permalink) Old 03-16-2000, 11:07 PM
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Re: Rough idle

I will definately keep my eyes open for you man. Finally washed my zuk after Tiftonia.... Cost me $5 to clean just the outside. Haven't even started the inside. Took the hi-pressure hose and hosed down the inside door panels and inside of the windsheild so I could drive, but that is it. You ought to see it now, it is beautiful. Still got 2 inches of mud inside though.
I'll watch, maybe we'll get lucky. I do know a yard in KY that keeps no less than 5 wrecked zuks in stock. His price starts around $600 for a motor. Don't know if you'd be interested in that though. A bit hi for me.

Take care man
bb

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