Well I'm just learning to drive my manual supra (I've only had a small amount of previous experience) and I think it would be a lot easier if my pedal wasnt so sticky or jumpy. I'll press the pedal, but it wont go and then when I put a little more pressure on it, it'll go down and jump up to like 2500rpms. I know that it would be a lot easier if it would just gradually go up and if I could control it more. What can I adjust/replace to get a smoother depression?
Sticky gas pedal
- Thread starter Back2Basics
- Start date
I think its our spring. Even if I am an NA guy with a automatic, You just need to break the tension on it and it will be smoother.
Should of explained better. Might not be on all Supras but on mine If I just floor the peadal it becomes a smooth push. Either that or you just need to get used to it. But then again thats coming from a slow person with an automatic.
A spring like that could be replaced could it not? Come on people who know stuff?
A spring like that could be replaced could it not? Come on people who know stuff?
Mine is smooth to when I push it down all the way, but like I said on the first post, I'm trying to learn to drive the manual transmission, so when I get going in 1st gear its sticky.
The Nylon washer might be worn out or gone.
http://www.supramania.com/forums/showthread.php?t=681&highlight=nylon+washer
Specifically this post.
http://www.supramania.com/forums/showpost.php?p=7374&postcount=8
http://www.supramania.com/forums/showthread.php?t=681&highlight=nylon+washer
Specifically this post.
http://www.supramania.com/forums/showpost.php?p=7374&postcount=8
There's actually 3 nylon washers on the throttle cable bracket...2 on either side of the spring on the center stud and one between the bottom metal arm and the main bracket. These get old and disintegrate causing the bracket actuating arms to be very sloppy. Also, the holes in the center metal pieces elongate from wear causing the same thing. I've taken these things completely apart to chrome them :naughty:
The bad thing here is you can't take the bracket apart easily...the center stud is riveted/swaged on the bottom of the bracket. When I did the bracket below, I had to fab a stud on a lathe, drill the center, and secure with an allen bolt & lock nut. The only thing I can suggest is to get the proper thickness nylon washers from the hardware store, cut a slot in the washer smaller than the diameter of the stud, and press it on till it snaps into place. That should work for a while.
The bad thing here is you can't take the bracket apart easily...the center stud is riveted/swaged on the bottom of the bracket. When I did the bracket below, I had to fab a stud on a lathe, drill the center, and secure with an allen bolt & lock nut. The only thing I can suggest is to get the proper thickness nylon washers from the hardware store, cut a slot in the washer smaller than the diameter of the stud, and press it on till it snaps into place. That should work for a while.
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supra90turbo said:
Thanks man :icon_bigg
It was a lot of work to get it to look like that...the 1st one I did didn't come out so nice. That's when I figured out there was nylon washers...melted them when I baked the ceramic on :3d_frown:
You're very welcome, and also... lol
Must've been like "what the hell?!? melted plastic all over?" haha
You should sell "remanufactured" ones like that, coated in the customer's preference.
Must've been like "what the hell?!? melted plastic all over?" haha
You should sell "remanufactured" ones like that, coated in the customer's preference.
supra90turbo said:
Yeah...I thought about that. The problem is what I would have to charge for them to make it worthwhile....powdercoat would be the best for nice color (the ceramic colors are kinda gay :gaybar: ) and I don't do powdercoat. That's why I went with the chrome.
I ended up coating and polishing each piece individually, then had to make the center stud (it's stainless BTW) on my crappy little lathe. Plus getting the washers and reassembling the darn thing...it's like a puzzle you need three hands with.
Before tearing apart the linkage, clean the throttle body and plate. It is probably covered with black goo that makes it stick.
It's a very common Toyota problem(not just mk3s). My 95 Celica and 85 Celica both did the same thing, though the 95 Celica was the worst of the three I've dealt with.
Luckily on the Supra there are enough adjustments to make it a little better. On mine I adjusted both the throttle body and the linkage that connects the bracket to the TB.
If you do it with the engine off you can mess with it and feel where it's sticking so you can adjust accordingly.
I would highly recomend testing it in the driveway and then in your neighborhood before settling on a final adjustment.
Luckily on the Supra there are enough adjustments to make it a little better. On mine I adjusted both the throttle body and the linkage that connects the bracket to the TB.
If you do it with the engine off you can mess with it and feel where it's sticking so you can adjust accordingly.
I would highly recomend testing it in the driveway and then in your neighborhood before settling on a final adjustment.