Have a couple of small issues and just wondering if anyone else is experiencing these.

Gear shifting when cold in 5 spd manual: The car/gearbox runs fine, but when changing gears with the lever, the lever seems stiff and can sometimes make a vibrating sound, almost thuds into place (this is strictly the gear lever, not the gearbox). When it warms up it is fine, and generally driving is much smoother (found this in the auto too so thats no issue).

Was just wondering if anyone else gets abit of this with the gear stick when cold?

Secondly, I think my ISC has failed, is there any particular way to test this? If i'm at a set of lights and not in gear, the car will sit between 1200 and 1500 and rev continously between the 2, like it can't decide what rpm it should be sitting at. My TR did the same thing and it was a wax pellet that was getting stuck open or shut in the ISC from memory, do TJ's suffer from this or similar? Could it be something else?

Thirdly, and i'm not sure if this may be related to the above, or something else (maybe because I have a pod), or its just what manuals do, if i'm coming to a stop in 1st or 2nd and sometimes 3rd when its cold and lift my foot off the accelerator completely, the car will constantly jerk itself (like back and forth about 5-6 times, i can understand once or twice, but constantly doing it i'm not sure?). To get around this I just put the clutch in, which is maybe what you're suppose to do. Only been driving manual for a month, you tell me :P. To me it almost seems like the car is confused with exactly how much air is coming in and is compensating incorrectly, and can definitely notice it happening more when cold. Sometimes it doesn't happen, it is quite a random occurrence.

You can test the ISC with a multimeter.
You have 6 pins, 3 on top, 3 on bottom. Middle pins are positive, both end pins are negative.
So if your looking at the ISC pins
1 2 3
4 5 6
put your multimeter between pins 1 and 2, 2 and 3, then 4 and 5, and 5 and 6, all coils off memory should be between the 25-35ohms region, if out of spec, replace ISC. I'd say that'd be the culprit as you mentioned. Just pick one up out of a newer magna and your gaurantee'd it should last a few years more then one out of a 2nd gen (same isc diff design)

yeah i have the same issue with my manual as well. very rough when cold but once it warms up its a lot smoother. if i had to take a bet id say its an oil issue coz my last car had the same problem and a thinner oil supposedly fixed that. though unfortunately not for long :(
best bet is to ask mal coz his selecting on his manual is very smooth :ninja: if you find out the secret be sure to post it up coz id like to be able to change gears in the morning without fearing that im gonna snap something :)

as for your other issue with the jerking im not sure i have that problem. like i get that reaction only if i take the clutch out too quickly but never when taking the accelerator off.

I used some Nulon G70 (I think thats the one) and Gee, that made cold shifting in the TR VERY nice in the morning. Just open up the fill plug and pour it in, cost me $18, I'd give that a go, made a difference after it got swished around for a while

;1217141']You can test the ISC with a multimeter.
You have 6 pins, 3 on top, 3 on bottom. Middle pins are positive, both end pins are negative.
So if your looking at the ISC pins
1 2 3
4 5 6
put your multimeter between pins 1 and 2, 2 and 3, then 4 and 5, and 5 and 6, all coils off memory should be between the 25-35ohms region, if out of spec, replace ISC. I'd say that'd be the culprit as you mentioned. Just pick one up out of a newer magna and your gaurantee'd it should last a few years more then one out of a 2nd gen (same isc diff design)

Thats with the engine running yeah?
Any idea what part of the throttle body is the ISC on a 3rd gen? I'll grab a 2nd hand one from jollys tomorrow.

Nah, you take it out and test it on the bench, dont do it with the car running or anything. you test the resistance of wires with no power going through them or else you can damage the ohmmeter.

Should be same part as a 2nd gen mate just flipped around, take off intake and she should be down the bottom.

Mate,
Why did you not just call me lol

The jerking is the TPS, easy fix

ISC, I have second hand one here

Shift, I would like to see for myself, is common for harder down shifts in low gears when the box is cold but may be able to do something here to ease it for you

When I think about it, I sometimes get the same jerky-ness, what is the 'easy fix' for the TPS?


Mate,
Why did you not just call me lol

The jerking is the TPS, easy fix

ISC, I have second hand one here

Shift, I would like to see for myself, is common for harder down shifts in low gears when the box is cold but may be able to do something here to ease it for you

Had Mal have a look at it today, jerking is gone, and the free revving is much better but not completely gone. Next service I'll swap over a new throttle body and see if that helps.