ZUKIWORLD Online | Suzuki 4x4 Editorial and Forum
ZUKIWORLD Discussion Forum => Suzuki 4x4 Forum => Topic started by: Digger on May 18, 2004, 04:23:29 PM
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I'm sorry if this has been asked before, but I searched back several pages and found nothing on it. My '90 Tracker has a surging problem. Whenever I fire it up on cool-cold mornings, it idles up like it should. Once it starts to get warmed up, the idle starts surging, bouncing from 2500rpm down to 1000rpm until the engine is pretty much fully warmed up, then it levels out at around 1000 rpm. It only does it idling in neutral, not if I drive it. What would be causing this and how do I fix it? The Haynes manual has nothing about it.
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read 'engine quirk' post, my 90 was surging after warm up too.
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this is not the same problem i'm having. i had this problem on my turbo sprint. i just ignored it for like a month and the problem went away, i never knew what was causing it.
sorry i'm no help :(
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I know that this is cross posting but it is the info that you may be looking for. This was on ORC Here is the link and info. It works! I did it on my kick 8v motor!
http://bbs.off-road.com/ubbthreads/showflat.php?Cat=&Board=offroadsuzuki&Number=1268180&page=0&view=collapsed&sb=5&o=31&fpart=1
I was tired of the 2-3000 rpm high idle and intermitant surging as engine warmed up. The fix is great-non perminant takes about 10 minutes and best of all costs little or nothing.
So far, engine and ECM seem to be working wonderfully.
Cold start this morning at 22 Deg. was great-----Engine fired first time and ran at 700 rpm until warm. Took a little longer to warm up than at 3000 rpm. Just think of all the fuel savings.
You need a piece of rubber tubing the same diamater as is used between the radiator and the overflow bottle. Cut off a piece about 1" long and insert a 3/4" long bolt that fits tightly into the tubing----all the way to the head.---Make sure that it fits tightly enough that no air or vaccum can pass through.
On the front of the throttle body--Passenger side----There is a cover plate with three screws on it.
Remove the plate.
Inside the hole, there is the infamous wax pellet that generally causes the surging problems.
This is the thermal valve that is operated by the temp of the antifreeze. When the antifreeze is cold, the pellet is cold and therefore, contracted. This lets a controled amount of air into the tb that is not metered by the butterfly. This extra air is what raises the idle. As the antifreeze warms up, the pellet expands and is supposed to slowly seal this intentionally created vaccum leak. This is supposed to slowly lower the idle.
Inside this cavity, there is a ring with several raised bumps around the surface. There is a hole in the side of this cavity that goes directly into the manifold. This is the hole that I plugged with the rubber tube and bolt. If the ring with bumps is in the way, take a sharp flat head screw driver and using the bumps, screw the ring in until it is far enough in that the vaccum hole is clear. Firmly insert rubber into hole---Make sure there is a GOOD seal or this will not work
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I'm going to have to try this. My Tracker idles okay when the outside weather is warm, but when it gets below 60 it surges and idles high.
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COuldn't you just replace the wax pallet?
Zig
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I did this to my Tracker yesterday. I haven't driven it a lot yet, but the idle seems MUCH steadier. I cut off 1 inch of the radiator overflow hose, stuffed it with a bolt and inserted it into the opening behind the cover with the 3 bolts. I wish I knew about this 9 month ago!
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another thing it could be is water in the gas tank..i had a surging idle not to bad but it would idle a little high and would bog..used some heat and all is well
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I had this problem also for couple of months and it was driving me crazy i .i tried ecm and the fuel injection but nothing helped .but one day it just went away and i m hoping it will not come back
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i did the cross post idea a few days ago, but i didnt plug the tube so i still get some air, just about 1/3 of what i did, it helped out quite a bit, but not 100%. ganna plug it the rest of the way tomorrow. nice fix, thanks.
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I spoke too soon. My tracker idles perfectly when the ambient temp is above 55 and the engine is warm. In cooler temps it still surges. I wonder if that is due to a faulty air temp sensor?