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diablooffire03

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Discussion starter · #1 ·
Ever since I purchased my 97 completely stock GST the transmission has always acted funny and I just can't figure it out and need some help. It is the most annoying thing and usually occurs after the car is warmed up, which doesn't take long.

The tranny pulls hard whenever you floor it whether in overdrive or not. Downshifts perfect on WOT, it basically does everything its suppose to do except the fact that usually from a stop my bogging down problem occurs. No I haven't seen any threads on this exact problem yet, as in my tranny shifts perfect and does everything perfect.... except for the sudden Bogging.

Ok finally... it seems to bog on light to mid throttle and very rarely on WOT and if I let off the gas and quickly hit it again it seems to like overcome the deadspot and its fine. Its like the car is in a rich state or somthing and just basically BOGS down but still accelerates smoothly, just with no power. Now I have done everything from changing the spark plugs, to wires, to trans fluids and find this super annoying that it still does it. And I have had the car for over a year and now have intercooler piping, boost controller, intake, Stainless turbo header back exhaust, and yet is still does it, but slightly improved. It seems to also do it less in the cold weather also.

So Please someone tell me how to fix this problem, it just doesn't seem mechanical at all, more or less a throttle problem or somthing. So please let me know. Thanks.
 
I had this problem for a long long time with my A/T...it got even worse when I installed 272s and did a head swap.
It seemed to get better after I made sure that my throttle plate was sealing up. It also got better after I installed new silicone couplers throughout my pipes. So in that sense it could be boost related, but I think the biggest improvement came when I installed a restalled torque converter...
 
Discussion starter · #4 ·
Thanks for the replys I was definitely thinking it may have somthing to do with my turbo cuz when this happens it just seems like everything is stressed like the motor sounds different and the suction sound made from the boost sound different when it suddenly bogs. Could I may have a over heating problem in my trans?? because it really doesn't BOG at all when I first take her out on the road somwhat cold it runs like a bat outta hell. Like everything is just perfect when its cold. The problem mainly happens when its warmed up. But I have also considered that maybe something could be wrong in the sence of a throttle problem... I just can't figure it out. Thanks for the input so far though I hope to see some more.
 
diablooffire03 said:
Thanks for the replys I was definitely thinking it may have somthing to do with my turbo cuz when this happens it just seems like everything is stressed like the motor sounds different and the suction sound made from the boost sound different when it suddenly bogs. Could I may have a over heating problem in my trans?? because it really doesn't BOG at all when I first take her out on the road somwhat cold it runs like a bat outta hell. Like everything is just perfect when its cold. The problem mainly happens when its warmed up. But I have also considered that maybe something could be wrong in the sence of a throttle problem... I just can't figure it out. Thanks for the input so far though I hope to see some more.
My 1998 GSX had a similar problem (it still technically does.) Try this, come to a complete stop every time and see if it happens. I have determined that mine will stick in 2nd or 3rd if you pull a rolling stop. If you go WOT, it will downshift and take off. Otherwise it feels sluggish. May not be what your experiencing. Worth testing. I just don't pull California stops and it doesn't happen anymore.

Anyone know if this is a "feature" or something adjusted wrong in the trans? It did this before I installed the Translab shift kit. Anyways, hope that helps. Next time you feel it from a stop, test it by manually downshifting (while still at a low speed.)
 
I have a similair problem. It happened a while ago, it gradually got worse. So I had tranny rebuilt. Also put all new turbo/piping everything on. Finally took it for a drive, does same thing :mad: It has no problems in reverse, and from above 3000 rpms in first gear its fine. If I floor it from a dead stop, the engine will rev right away to 2500-3000 rpms then stay there, and I'll slowly crawl forward, gradually accelerating to like 30 mph, as if the cluch pack is slipping or the tc is messed up (its a brand new tc, and was rebuilt with IPT's rebuilt kit), then the engine will act normal (mph go up with rpms) . I have to get a rolling start just to pull up my driveway. If I dont, ill get stuck, i can floor it and it wont go anywhere. I dont know if yours is like this at all, but i still havent figured it out. Im having the guy who rebuilt it come to my house this week, have towed to the shop later in the week probably.

edit: also no ECU or TCU fault codes at all.
92 TSI AWD AT
translab shift kit
IPT overhaul kit
just rebuilt
18g
supra smic
650s
maft
3" exhaust
 
Discussion starter · #7 ·
Hey Mirage1 mine pretty much does the same thing I mean it hasn't gotton any worse than its been since i owned the car. On a lucky day it won't do it at all, but if i try to make it do it I just give it some throttle while rolling in second or third and then it turns into shit mode and if I slowly keep depressing the gas till its floored it will pick up speed, but in slug mode. So I let off the gas and try again and its fine, and this rarely happens on wide open throttle, which is a plus cuz i would go crazy if i couldn't go fast...
And as for need4speedTSI I can't believe your still dealing with it after a rebiult tranny, I'm sorry to hear that. That is a huge help because that shows me that it prolly aint the trans, and just something else..., but what.... hmmm. If anyone knows some more info gimme some good news on this for us with the problem.
 
need4speed, are you sure it's a tranny issue? Did you try putting the gear selector in 1 gear and see if it does anything different? Does OD on or off make any difference? Your problem sounds like an issue with a bigger turbo, and tranny. When the car starts acting normal does that have any relation to a boost pressure? It almost sounds like something is binding in the tranny. The TC flashes to stall speed, and if clutches are bound in the tranny, it won't get up to speed, engine slowly gets up to a high enough RPM where the turbo starts spooling, and the car makes enough power to pull through the binding clutches.

AT rebuilds are quite tricky. If you want a tranny built right, the safest thing to do is to send it to John.
 
Mirage1 said:
My 1998 GSX had a similar problem (it still technically does.) Try this, come to a complete stop every time and see if it happens. I have determined that mine will stick in 2nd or 3rd if you pull a rolling stop. If you go WOT, it will downshift and take off. Otherwise it feels sluggish. May not be what your experiencing. Worth testing. I just don't pull California stops and it doesn't happen anymore.

Anyone know if this is a "feature" or something adjusted wrong in the trans? It did this before I installed the Translab shift kit. Anyways, hope that helps. Next time you feel it from a stop, test it by manually downshifting (while still at a low speed.)
I experience the same on my 95. And sometimes even if I do come to a complete stop it seems to stay in 2nd and start in that...but the problem is more obvious when I do a roll through stop at a light...
 
Discussion starter · #11 ·
My trans fluid is perfect... I thought of that may being the problem... No good though
 
The last time it happened to me, I manually put the car in 1st gear and it downshifted. That is a pretty good sign that it is sticking in 2nd or 3rd unless I come to a complete stop. Give it a try. I bet yours does the same.
 
Discussion starter · #13 ·
Mirage1 said:
The last time it happened to me, I manually put the car in 1st gear and it downshifted. That is a pretty good sign that it is sticking in 2nd or 3rd unless I come to a complete stop. Give it a try. I bet yours does the same.
Yup if I start out in first it still slightly does it... Not as often and not as noticable.
 
The trans is meant to stay in 2nd gear when you stop. Mitsubishi designed it this way. When you pull up to a stop sign it stays in 2nd untill you actualy start to move again, at which point it will kick down to 1st. These cars do have some turbo lag. They're not exactly light, and once you start getting into bigger turbos it does get to be noticeable. IE if you roll away from a stop and stomp on the gas, nothing happens for a while.

Also, any time I've had problems with "bogging" bucking, the car feeling like its fallen on its face, its usualy time for new plugs. Yes I know you just did them. Do them again, these cars eat through them like you wouldn't belive (5000 miles or less on coppers).
 
The trans is meant to stay in 2nd gear when you stop. Mitsubishi designed it this way. When you pull up to a stop sign it stays in 2nd untill you actualy start to move again, at which point it will kick down to 1st. These cars do have some turbo lag. They're not exactly light, and once you start getting into bigger turbos it does get to be noticeable. IE if you roll away from a stop and stomp on the gas, nothing happens for a while.

Also, any time I've had problems with "bogging" bucking, the car feeling like its fallen on its face, its usualy time for new plugs. Yes I know you just did them. Do them again, these cars eat through them like you wouldn't belive (5000 miles or less on coppers).
 
Discussion starter · #16 ·
I was reading about that phantom knock thing and this problems seems to be very much a type of knock problem. And what is Mccc cuz I have noticed when I use Fuel injector cleaner in a tank it doesn't seem to do it. Also its more rare with a full tank of gas. ????
 
I guess the problem may be the tcu on mine. Im goin down to the shop to test it now, I dont really understand how this could be, cuz when i pulled codes, i got the constant short pulses, which means theres nothing wrong supposedly. I dont know I hope thats my problem.
 
Stingray90 said:
So, you guys ever get to the bottom of it?
This is some very scary stuff, because mines has been doing the same thing ever since I had the motor rebuilt. Now I too wonder if is a boost leak of some sort. Then again, I am hearing this tapping noise whenever the car is warmed up. And like it was said, the car seems to run like garbage when it is warm.
 
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