Motor idling at 2000 and pusing 3000RPMs. Need some experienced advice.

[MERCiLESS]

OK OK OK. Let me start off by saying that I was a jerk and did some crap that I shouldn't have done with the car. I got a 1988 Turbo with a JDM crate motor, replaced the head gasket, ARP bolts, titanium pistons, blah blah blah. I took a drive up to the GA mountains a 4.5 hour trip with the kids enjoyed the views and when I got back home and dropped off the kids I went and did some burnouts and doughnuts. Unfortunately for me I forgot that I needed to change my oil and the trip to the mountains seem like it burned it up even quicker due to the elevation.

So after having a fun time doing a bunch of STUPIDNESS (soing burnouts in reverse) my poor baby began to knock. Long story short I parked her up and dropped the pan.Check all the bearings and sure enough #2 was spun, 4, 5 and 6 were worn a bit so I replaced them all, zipped her back up but now I have a problem.

When I start the car she idles initially at 2K RPMs and starts moving up slowly to 3K and I just shut her down from there.

I'm thinking I may have thrown off something, my TPS, ICS, something..

I reloaded my MAP file (Usign the first version of MAP ECU) but that did not help so I'm thinking it's definitely mechanical.

Any help, suggestions would be appreciated and if you want to stop by the house in Douglasville, GA and help me out that'll be appreciated also.

MERC.

 

[clutch]

Do you know how to reset the TPS, Not saying that this is the issue but it may be a good place to start.

 

[MERCiLESS]

No I do not but I will be willing to give it a shot. If you can point me to a post on how to do it that'll be great but I'll also do a search for it now.

MERC.

 

[clutch]

I may have overlooked it are you running a 7m or a j series

 

[clutch]

just seen it in the 7m technical section.

I have not found anything on here but I havent really looked but I did find this one for you that is very user friendly because it has alot of pictures lol

http://www.mkiiisupra.net/bbs/showthread.php?t=31700

just hit 50 post yahhhhhhh!!!!!!!!

 

[clutch]

I have personally used this one to do my TPS


http://www.mkiiisupra.net/bbs/showthread.php?t=32492

 

[MERCiLESS]

Hey Clutch,

Thanks for the help and the posts. I'll try them out hopefully the first that I try works later on. Hopefully I can figure it out and get this beast on the road.. I'll keep you guys posted. If there is anyone else that has anything else to add please feel free to do so.

P.S. Congratulations on the half-a-century...

MERC.

 

[clutch]

No problem and thanks lol. Thought I would shoot that one to you because it helped me out when I had to recalibrate my TPS and there are a few good guides on there that may help you along the way.

 

[MERCiLESS]

Problem found and solved... Hey Clutch, you won't believe what it was... That adjustable screw that is used to set the accelerator linkage was advanced for some reason causing the idle position to be at 2000+ RPMs. I tinkered with the TPS assuming that was the problem but it's a good thing I did not mess it up. I'll have to go through my motor and clean up some stuff, get rid of clips, wires, connectors that are not in use and tighten up as much as I can.

Thank you for your help and now knowing what to do when I do have a TPS issue is a great "rabbit in the hat" to have.

 

[clutch]

No problem, and that is crazy that it boiled down to loose hardware lol. By the way where you get those titanium pistons from I found the rods in titanium a while back and I think I saved it somewhere got to look but would deffinately like to know where you got the pistons from.

 

[MERCiLESS]

Man. eBay. I had a "Toyota specialist" repair shop put in the JDM motor for me and while he was in the motor changing the bolts and metal head gasket he asked if I wanted to get those pistons off of eBay. I can't tell ya the seller, type, nothing I do not have any information on them just knew he got them from eBay.

Well I took her out for spin tonight, ran her for about over an hour and she's still singing lovely. Will take her to work with me tomorrow about an hour away at highway speeds but I'll be taking my time babying her and see what happens.

Oh, have you ever had any issues with your steering? My steering has about a 4 inch play left or right but it is awful. I did an alignment already but that did not help any. Got a lot of play and driving on the highway even the backroads sometimes will cause the car to drift because the play causes them not to be engaged.

Let me know if you've come across anything with that.

MERC.

 

[clutch]

As far as the steering issue that is something that I have never came across with mine but then again the roads over here are terrible so you wouldnt be able to tell lol. I do know that sometimes when I give mine gas on a straight away it will be driving fine and then when you let off it I will feel the steering wheel start to pull to the left. I was just thinking that it might be something to do with the pump. Kind of a letting off pressure type of thing. Hopefully you get that. So it might be a good idea to start a little research.

 

[shipkiller]

I have a terrible play in the wheel too, I have something like +- 45deg of rotation to stay in a straigh line... Any idea what I should check first?

 

[GrimJack]

Jack up the front end of the car and push / pull the front wheels - with that much play, you should be able to track the problem to a loose, broken, or badly worn component.

 

[MERCiLESS]

Sounds simple enough Grim, will give that a shot.

Anyhow..... I had a catastrophic failure on the way home. The motor ran fine, I was hearing a slight knocking noise again in the lower gears so what I did was quick shift out of the lower gears and the noise went away in 4th and 5th gears. That was one way to work in stop and go traffic yesterday, something awful here in Atlanta.

On the way home I experienced no noise in the lower gears like I did in the morning, the only difference is that the weather was much warmer and I had the opportunity to take the top off for the ride home. Failure happened when I was driving and noticed my clutch getting half way up, sticking and then releasing quickly.

I did not pay it too much attention because I was still able to shift gears. On the last stretch of highway home about 6 miles to go I was pulling up on a tractor trailer in 5th, I downshifted to pass him and the car won't allow me to go into 4th gear, I braked a little and could not go into 3rd gear so I put it back in 5th the only gear that I could go into and gunned it back behind the trailer before I lost my momentum. So I tried depressing the clutch and it went in freely for 80% of the way to the floorboard and then I got a little resistance for the last 20% but I had to slow the car down bringing it into the gear range in order to shift into any gear other that 5th.

I was able to get to first, second and third gears and pull off the highway into a gas station good thing I made up 5 and a half of the 6 miles and got a uhaul car carrier to bring her home. So the situation is this, clutch has no resistance, car won't shift into any gear, reverse grinds the clutch, and there's 4 extra bolts sitting in my garage from the "mechanic" replacing the bearings on the motor. I said to him that these extra bolts belong somewhere and he swore that everything was bolted up and nothing was left out.

I'm thinking this dude tried to kill me intentionally.

Anyhow if you guys have any clue what caused all of that do let me know.

Back to playing the sit and wait game...

This is one of those times where I get fed-up and just want to sell this car or strip it and let others benefit from my bad experiences trying to get this car on the road once and for all.

MERC.

 

[clutch]

just pull the inspection plate off the front of the transmission and see what it looks like. that would be a good start right there. that also bites that this is happened to you now that you get the idle issue fixed.

 

[MERCiLESS]

Yep, story of my life with this Supra. If you check out all my posts they're all about fixing this car, no fun posts lol. I must be a sucker for punishment and torture. I'll keep you guys posted.

 

[clutch]

I wouldnt worry about it because you never have no idea how the person prior to you taking ownership of a car thrashed it around. And all that will eventually come into play somewhere. It is just a risk that we take when we buy a car that has a reputation to uphold lol

 

[ForcedTorque]

Sounds like you have a failed clutch master or slave cylinder. It is recommended that you change both, IF that is the case. A new one at one end will quickly overwork the other if you just change the bad one, and you will be there again.

Your frustration will disappear just as soon as you have it fixed. Your car is almost 25 years old. You better get used to having a problem from time to time. If you get rid of it, the problems will go away, but you won't ever stop wishing you had it back

 

[MERCiLESS]

Torque, yeah I know what you mean and my 11 year old son has already made claim to it when he's able to drive. The clutch was good before we touched anything in the motor and then again you can be correct because with these cars you just don't know what goes wrong until you get in there. I'll keep you posted hopefully I can get that "mechanic" to get over here soon, so unreliable...