TPS voltage

[Gregg]

I've been trying to track down a lack of "pick-up", "power", "get up and go", and in my EFI set-up. We tried restabbing the distributor (yes-at the M&G) without much of a change. I cleaned the MAF sensor which DID make a difference. But I still feel like there is a delay in fast acceleration. No backfires, just the Bronco taking some time before it gets going. Therefore, I'm looking into the TPS. I've read into a couple post on CB.com but can't find exactly what I'm looking for. Some threads suggested the voltage on the "Green" wire should be between .75 and 1.00 V. However, the guy in the following video got a better acceleration response we he moved the sensor so it read 1.17 V. Long question short: Can I just swivel this sensor to an optimal response? What do you other EFI dudes have it set at?
just checked mine: KOEO .71 V
http://www.cleanvideosearch.com/media/a ... QXnMku7UHE

BTW - Mustang/Explorer set-up.

Thanks!

[Gunnibronco]

I always read to put it as close to 1.0 without going over.

[EFI Guy]

I set em all at .95 and call it done.

Increasing the voltage for better response is a wives tale, whoever came up with that doesn't understand how "ratch" works. In fact setting it higher could cause the opposite, You may have to open the throttle even further before WOT mode kicks in. With the TPS set higher it may take say 3.2 volts because the ratch value is higher to trigger WOT mode in the PCM rather than 3.0 volts.

What PCM code and MAF are you running?

[ZOSO]

What Garry said. I've always done 0.96v on all tps sensor's.

[Gregg]

What PCM code and MAF are you running?

I thought it was a A9P but it's a A9T. Here's a little web search:
The A9T is another EEC that follows the same memory strategy as A9P. The A9T was tuned for the State Patrol 5.0L Mustangs in the late 80s and early 90s. They are rich-tuned in Closed Loop, but at WOT run a bit leaner than stock A9P. The stock 5.0L GT EECs are notorious for being overly rich at WOT to the point of loosing power. Presumably Ford made the assumption that people would put mods on the engine and to be safe, it is rich-tuned...better to be too rich than too lean. Another benefit the A9T has over the A9P is a higher spark advance at WOT and non-WOT conditions. I have no clue what mechanical differences there were between the stock GTs and the State Patrol 5.0Ls, but the tune is certainly different and obviously directed to improve performance. The only non-performance difference in the tune is a slightly higher EGR flow likely to help with NOx emissions due to the higher spark advance.

MAF is F2VF-12B579-A2A. AFH70-04. Stamped 5002. I'm not sure what it came off
of.
94-95 Mustangs V8 or V6
92-94 Crown Vic 4.6
92-94 Town Car 4.6
92-94 Grand Marquis 4.6

I'll try to adjust the TPS to .95 after work tomorrow. I don't want to test it on my way to work.

[Gregg]

Update:
I moved TPS volts up to .95 and it was idling fine but accelerating from a stop was rougher. I moved it down to .83 and it seems pretty good. Overall, it has been an improvement. I ran codes just because and I will cross reference them later.
KOEO: 81, 82, 85, 84
KOER :94, 44, 33

I'll take a look at the cylinder balance test tomorrow.

[Viperwolf1]

Try androgel.

First thing I would look at is to see if the throttle is opening all the way. Maybe your purse is stuck under the pedal.

[Moab Mike]

Now that's funny!

[EFI Guy]

If you're going to be at the breakfast...Clean the greasy stuff out of your J3 port, I wanna stick something in it.

[Justin]

Will you be requesting his TPS report?

[Gunnibronco]

Will you be requesting his TPS report?

Don't forget your cover page.

[Gregg]

Here I was enjoying the peace and quiet of this thread...

Try androgel.

First thing I would look at is to see if the throttle is opening all the way. Maybe your purse is stuck under the pedal.

Yes it's opening all the way. Androgel apparently has a lot of uses.

If you're going to be at the breakfast...Clean the greasy stuff out of your J3 port, I wanna stick something in it.

But I just cleaned out the Ahole port! Okay......I'll clean out all the androgel out of the back of the EEC (and save it for later).

Will you be requesting his TPS report?

Don't forget your cover page.

I'll bring the TPS report with a loose cover page. I don't have my stapler.

[Booger]

Stupid question but does the distributor have mechanical advance or is it all ECM controlled.

[Gunnibronco]

Stupid question but does the distributor have mechanical advance or is it all ECM controlled.

I don't think it has any mechanical advance, but I remember when I had a 5.0 in college and it was suggested to set the initial timing @ 13* BTDC instead of the factory 10*.

Does this really help/do anything at all? Does it help at altitude?

[Booger]

Here at altitude you can use a bit more advance. I think I used to use a couple more in all my old dizzy vehicles. Added a couple more degrees on my Harley as well. Might be too much a lower elevations but riding/driving up here it works.

[Gregg]

There's a guy on this thread that advances and retards his distrutor for the summer and winter seasons. I know it doesn't help his elk hunting.

[Viperwolf1]

You can run a few more degrees advance during cold temperatures generally. Just bump it up a few and if it doesn't ping you're good. What is your timing set at now?