TPS setting
Thread Starter
Le Mans Master
Joined: May 1999
Posts: 6,692
Likes: 29
From: Texas
TPS setting
The spec setting of the tps for the 82 is .525v, + or - .075v.
What is the effect of being on the high side, or being on the low side of spec.
I have seen some say there is a "performance" setting. It was on the high side.
Is this just so much BS, or worth doing.
[Modified by Larry82, 8:59 AM 9/10/2001]
What is the effect of being on the high side, or being on the low side of spec.
I have seen some say there is a "performance" setting. It was on the high side.
Is this just so much BS, or worth doing.
[Modified by Larry82, 8:59 AM 9/10/2001]
Race Director
Joined: Sep 1999
Posts: 11,361
Likes: 383
From: Plano TX
Re: TPS setting (Larry82)
On the older EFI systems such as the one on the '82, the TPS reading determines quite a few things. For instance, as you increase throttle and TPS goes up it will come to a point where the ECU switches to 'power' mode. This means open loop, richer mixture and different timing advance. So setting the TPS at the high side at idle will make it reach the power mode at a lower throttle. Often the engine feels more responsive and stronger doing this.
Try it and if you don't like it you can always change it back.
Try it and if you don't like it you can always change it back.
Thread Starter
Le Mans Master
Joined: May 1999
Posts: 6,692
Likes: 29
From: Texas
Re: TPS setting (zwede)
Thanks, just checked mine. About 6 months ago, maybe more, set it dead on specs. Now, just checking, it was at .49v. Wonder why it dropped. Anyway, bumped to .565v (that's where it ended up, after tightening screws). Cleared ECM. We'll see tomorrow. Thanks.
Race Director
Joined: Dec 1999
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Re: TPS setting (Larry82)
You can set the TPS a little higher but I doubt you'd notice it. A better way to increase fuel delivery is (loose from tuning the ECM) bumping the fuel pressure.
The power mode is actually frst determined by the MAP signal!
.49V works just fine, the TPS has a tendency to back off a little over time. Periodic checks will keep it up to spec!
Marck
The power mode is actually frst determined by the MAP signal!
.49V works just fine, the TPS has a tendency to back off a little over time. Periodic checks will keep it up to spec!
Marck
Thread Starter
Le Mans Master
Joined: May 1999
Posts: 6,692
Likes: 29
From: Texas
Re: TPS setting (Twinnie)
It did seem better this morning, but so many variables. This morning is cooler, mid 60's and lower humidity, rather than upper 70's and high humidity. Maybe it was just nice to cruise with the windows down for a change. :yesnod: Anyway, if it is going to fall over time, would rather start off high.
I have my fuel pressure set at 11 now. It was at 13 but that was too high. Had tried out the vacuum assisted fuel pressure setup that was described on thirdgen.org in numerous posts, but I could never get idle pressure low enough, even with regulator screwed out all the way. Would be at 15, under load, over 20. Way too rich. But that is another topic.
I have my fuel pressure set at 11 now. It was at 13 but that was too high. Had tried out the vacuum assisted fuel pressure setup that was described on thirdgen.org in numerous posts, but I could never get idle pressure low enough, even with regulator screwed out all the way. Would be at 15, under load, over 20. Way too rich. But that is another topic.
