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#31
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Re: Adjusting the TPS
Hey Trevor I replaced my AAVC a couple of years ago - NZ$40.00 (also got Giltraps to give me back the old one - they said it was a non-serviable part..)
The car was smoking during idle - white/grey smoke, thought it was oil (which it was - the AAVC was clogged, bi-mettalic strip could not pull shut because of oil)- I cleaned the old one out with white spirits - now boxed in my garage, checked it with 12V pulled close no problems. Glad to see you return.. Steve |
#32
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Re: Adjusting the TPS
Trevor isn't back yet. This last post from him on this topic was back in 2007
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Seth 94' Barcelona Red w/ Tricoat black 2-tone AWD Ls -Sold Mods:AWD conversion/4.44 swap by Budfreak, Custom red interior lights, Custom Satin black dash, Power mode switch, Cold air intake, Permecool tranny filter,Sony xplode 10" sub, Sony xplode 1000w amp, Blitz in-line driver, DDM Tuning 6000k HID's, New paint job/body work by me, 97' Grill, QC shift kit, 17'' MB Motoring rims, 15&20 min mod, front & rear urethane swaybar bushings, Custom fiberglass sub box, Custom red led a/c control unit, perrin lightweight crank pulley, Black wrinkle finish powdercoated intake manifold w/ clear hoses , 02' outback heated/power black leather seats Soon to come:Fiberglass hood, upholster ALL suede to black leather Past subies: 92' Pearl White/black top LS-L-SOLD 96' Legacy Outback-TOTALED 99' Legacy Outback Limited 30th anniversary edition-TOTALED 98' Forester L -Totaled Other toys: 99' Forester S -WRX brake upgrade, soon an 04 wrx motor swap 06' B9 Tribeca-Stock 1982' Yamaha xj650 Maxim Mods: work in progress |
#33
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Re: Adjusting the TPS
OOPS!!! failed to read date, sorry
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#34
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Re: Adjusting the TPS
bump still need an answer
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Seth 94' Barcelona Red w/ Tricoat black 2-tone AWD Ls -Sold Mods:AWD conversion/4.44 swap by Budfreak, Custom red interior lights, Custom Satin black dash, Power mode switch, Cold air intake, Permecool tranny filter,Sony xplode 10" sub, Sony xplode 1000w amp, Blitz in-line driver, DDM Tuning 6000k HID's, New paint job/body work by me, 97' Grill, QC shift kit, 17'' MB Motoring rims, 15&20 min mod, front & rear urethane swaybar bushings, Custom fiberglass sub box, Custom red led a/c control unit, perrin lightweight crank pulley, Black wrinkle finish powdercoated intake manifold w/ clear hoses , 02' outback heated/power black leather seats Soon to come:Fiberglass hood, upholster ALL suede to black leather Past subies: 92' Pearl White/black top LS-L-SOLD 96' Legacy Outback-TOTALED 99' Legacy Outback Limited 30th anniversary edition-TOTALED 98' Forester L -Totaled Other toys: 99' Forester S -WRX brake upgrade, soon an 04 wrx motor swap 06' B9 Tribeca-Stock 1982' Yamaha xj650 Maxim Mods: work in progress |
#35
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Re: Adjusting the TPS
Quote:
We'll have to get Trevor back soon to give us the definitive answer to these questions. I'll venture my opinion for what it is worth: First and foremost you are supposed to set this voltage value with the ignition on, and it's fair to presume that this means just the ignition and no ancillaries. In that respect you may be the first to notice these differences with the fans. Do you mean the engine cooling fans? I presume so, they would be a heavy draw. This may mean you are adjusting the TPS after a drive while the engine is hot. I would advise adjusting it on a cold engine with nothing running nor switched on except the ignition. Not having checked this out for myself I don't know for certain, but I would expect the voltage drop you noted is normal when the fans are drawing. Remember with only the ignition switched on, you are drawing directly from the battery, which is a finite source. The alternator is not pumping up the system as it will when the engine is running. Regards your code 31 you should possibly run the second TPS test in the How-Tos, the one from SVX _Commuter. What goes wrong with an old TPS can be the position where the internal wiper arm normally sits while you are driving [say you drive at 2200 RPM for the sake of argument] this portion of the slider wears at that position. The voltage is meant to change smoooooothly as Trevor says over the range of the device. If voltage jumps or changes momentarily to zero at the worn position, this will throw the TPS code. There is no fix for this that we know of except replace it with a new one. Joe
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Black Betty [Bam a Lam!] '93 UK spec, still languishing Betty Jersey Girl Silver '92 UK [Channel Isles] 40K Jersey Girl @ Mersea Candy Purple Honda Blackbird Plum Dangerous White X2 RVR Mitsubishi 1800GDI. Vantastic 40,000 miles Jersey Girl |
#36
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Re: Adjusting the TPS
Joe, you are correct about a normal voltage drop with the fans drawing amps from just the battery.
I would think that adjustment of the TPS would seldom, if ever be necessary without some damage being done to the unit. Seems like adjustment might find an undamaged place to routinely operate the unit and giving it some more life. Just a thought... Keith |
#37
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Re: Adjusting the TPS
Thanks Keith for the backup
It's a fair point you make, that having to reset the unit may imply it has wear at some point. However, moving the end point will only make a difference to what revs the slider runs past the "bad" spot. Always assuming it is wear that caused the upset. If it still runs past the bad spot as you are revving through 1,2 and 3 range it will still throw up the bad voltage and possibly throw a code. It might extend the life of the TPS, but it is so critical to engine tuning, I would still advise changing it to have the car run right. You might recover the cost of the new TPS in gas consumption saved. However before buying a new one [they are over a hundred bucks!!] I would certainly be running that second TPS test to be sure there actually was a "bad" spot causing the problem. Joe
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Black Betty [Bam a Lam!] '93 UK spec, still languishing Betty Jersey Girl Silver '92 UK [Channel Isles] 40K Jersey Girl @ Mersea Candy Purple Honda Blackbird Plum Dangerous White X2 RVR Mitsubishi 1800GDI. Vantastic 40,000 miles Jersey Girl |
#38
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Re: Adjusting the TPS
I did it with the car running at operation temp. Then adjusted it to .48 then the fans kicked on and i noticed the drop but after they stopped it went back to .48. i also got the code cleared i think because i unplugged the battery all night and plugged it back in and check for codes and only got the CEL blinking a million times so i assume there is no more codes.
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Seth 94' Barcelona Red w/ Tricoat black 2-tone AWD Ls -Sold Mods:AWD conversion/4.44 swap by Budfreak, Custom red interior lights, Custom Satin black dash, Power mode switch, Cold air intake, Permecool tranny filter,Sony xplode 10" sub, Sony xplode 1000w amp, Blitz in-line driver, DDM Tuning 6000k HID's, New paint job/body work by me, 97' Grill, QC shift kit, 17'' MB Motoring rims, 15&20 min mod, front & rear urethane swaybar bushings, Custom fiberglass sub box, Custom red led a/c control unit, perrin lightweight crank pulley, Black wrinkle finish powdercoated intake manifold w/ clear hoses , 02' outback heated/power black leather seats Soon to come:Fiberglass hood, upholster ALL suede to black leather Past subies: 92' Pearl White/black top LS-L-SOLD 96' Legacy Outback-TOTALED 99' Legacy Outback Limited 30th anniversary edition-TOTALED 98' Forester L -Totaled Other toys: 99' Forester S -WRX brake upgrade, soon an 04 wrx motor swap 06' B9 Tribeca-Stock 1982' Yamaha xj650 Maxim Mods: work in progress |
#39
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Re: Adjusting the TPS
What is the cheapest price for a tps anyway? I was thinking they were at least $200 and am rather certian that mine is worn in a single spot.
(The tps on my truck acted like it was bad, but never threw a code. I delt with it's random idle hunting (it would only act up when I couldn't test it) for 9 yrs before it finally threw a code. Tested it over a dozen times on an o-scope during that time too. I finally replaced it and all is well.)
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"They that can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety." Benjamin Franklin blk 92' LSL w/ average mods pics here http://s306.photobucket.com/albums/nn277/yourconfused/ Cash68: "Hmm, I wouldn't brag about beating Escorts. That's like saying you tricked a retarded person." |
#40
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Re: Adjusting the TPS
Quote:
__________________
Black Betty [Bam a Lam!] '93 UK spec, still languishing Betty Jersey Girl Silver '92 UK [Channel Isles] 40K Jersey Girl @ Mersea Candy Purple Honda Blackbird Plum Dangerous White X2 RVR Mitsubishi 1800GDI. Vantastic 40,000 miles Jersey Girl |
#41
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Re: Adjusting the TPS
Quote:
Try ringing Jackie at Annapolis Subaru, good service, in fact excellent, and price is always keen. Joe
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Black Betty [Bam a Lam!] '93 UK spec, still languishing Betty Jersey Girl Silver '92 UK [Channel Isles] 40K Jersey Girl @ Mersea Candy Purple Honda Blackbird Plum Dangerous White X2 RVR Mitsubishi 1800GDI. Vantastic 40,000 miles Jersey Girl |
#42
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Re: Adjusting the TPS
I feel better now knowing I didn't screw it up. Thanks
__________________
Seth 94' Barcelona Red w/ Tricoat black 2-tone AWD Ls -Sold Mods:AWD conversion/4.44 swap by Budfreak, Custom red interior lights, Custom Satin black dash, Power mode switch, Cold air intake, Permecool tranny filter,Sony xplode 10" sub, Sony xplode 1000w amp, Blitz in-line driver, DDM Tuning 6000k HID's, New paint job/body work by me, 97' Grill, QC shift kit, 17'' MB Motoring rims, 15&20 min mod, front & rear urethane swaybar bushings, Custom fiberglass sub box, Custom red led a/c control unit, perrin lightweight crank pulley, Black wrinkle finish powdercoated intake manifold w/ clear hoses , 02' outback heated/power black leather seats Soon to come:Fiberglass hood, upholster ALL suede to black leather Past subies: 92' Pearl White/black top LS-L-SOLD 96' Legacy Outback-TOTALED 99' Legacy Outback Limited 30th anniversary edition-TOTALED 98' Forester L -Totaled Other toys: 99' Forester S -WRX brake upgrade, soon an 04 wrx motor swap 06' B9 Tribeca-Stock 1982' Yamaha xj650 Maxim Mods: work in progress |
#43
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Re: Adjusting the TPS
Can I get a confirmation on what temp the engine has to be when checking the voltage? I read the 92 manual and it mentions at operating temp and then others have said check on a cold engine.
What's the majority vote: Cold Engine or warm operating temp engine? |
#44
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Re: Adjusting the TPS
Quote:
The voltage SHOULD read the same. ( 0.48V.)
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www.svxfiles.com The first SuperCharged SVX, the first 4.44 gears, the first equal length headers, the first phenolic spacers, the first Class Glass fiberglass hood, the first with 4, 4.44s in his driveway Fiberglass Hood thread My locker 4.44 Swap link |
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