briholt

So, in a different thread, this came up:
If you read that thread for a brief moment, a few others have disconnected their TPS without much change. What gives?

I've disconnected my TPS and drove about 30 miles without much change in gas consumption (I'm only getting about 12.5 mpg). I get 12.5 with or without the TPS connected.

Seems like my TPS could be working, or not.

874runnersr5

One way to find out.. search and find the specs and test er.

weaselman

i get about 200 miles to a tank no matter what i do.

bored out .5 over with engnbldrs 261 cam in it.

Tracey98277

yep same here, 200 miles a tank no matter what.

Tracey98277

isn't the tps just a secondary system? like it recognizes idle, 5% open, and full open throttle? any thing between 6% and 99% open throttle it uses the O2 sensor in a closed loop right?

abecedarian

Nope. Throttle angle is measured and correlated against VAFM position, intake air temp, coolant temp and RPM to look up fuel mixture and ignition timing. To an extent, the ECU also monitors the opening and closing rate of the throttle to determine acceleration / deceleration conditions and enrich / cut fuel accordingly.

Tracey98277

you sir, always answer my MFI questions lol. i never was sure how the two worked together.

Tracey98277

so i imagine that unplugging the TPS would really piss the computer off. therefore, i don't see how anyone would get better mileage like that, unless their TPS was bad.

briholt

Naw. already did that. it's in specs, yet the only thing that changes when you pop it off is the rpm increases.

briholt

That's sort of my thinking as well. though it's in specs: 1st table VAF (MAF) 2nd table TPS

Of course, my ECU could be wacked.

And for the record, timing's good, new ngk plugs and wires, new OEM cap/rotor