TPS adjustments, unclear on voltage readings. - Page 2

cre · 06-20-2011, 08:42 PM

The Crassida's intake is different than the GTE's... it just looks similar. The Supra and the Crown N/A's (ALL YEARS of 7M and also the 2JZ series) ran a very different setup than the Cressida's thanks to the ACIS system and tuning differences based on it.

Those flow numbers for the injectors aren't quite accurate. That's pretty much just a step above the middle of the VERY broad range that Toyota specifies for its injectors and rather hopeful for 20+yo injectors. The 89+ injectors are supposed to flow 276 to 340cc/min, pre89 aren't much less. Toyota also says a variance of as much as 36cc/min between injectors is fine...

. It's irrelevant to me as I won't install used injectors unless they've been cleaned and blue printed... half of the ones you send to the shop are trash at this age. I misread though and thought you meant you were running the newer ECU with the grey plugs, not that it was used to build a Fields harness.

The VSS is labeled SPD in Toyota's publications, you'll probably find more info looking for that. I think most of the Toyota speedometer heads from that vintage provide the same VSS signal.

The oil signal may only be used in the GTE ECU, I can't recall.

Nathaninwa · 06-20-2011, 09:13 PM

Do you think I would benefit from the GE style intake? I use the motor a lot in the lower rom range as the truck has 4.88 gears and duel transfer cases. Is the internal tuned flapper a mechanical system or something wired into the ecu?

That's crazy on the injector variances. I did have these cleaned on an injector cleaning bench but not flowed.

I did just buy a set of Fuel Injecotr Clinics 2150cc injectors for my Volvo. The spec sheet only shows a difference of 2cc flow, nor matched within a half percent! Lookin to get 600whp out of them.

Ill do some more research on the spd acronym.....either way its generated at the cluster so ill locate it and ship it over there to the ecu.

Thanks for all your guys help.

cre · 06-20-2011, 09:50 PM

The ACIS system helps most with the lower torque curve but it also helps ensure a more consistent flow to all of the cylinders. The system just consists of the upper intake plenum (surge tank) and the "Y" pipe, a vacuum canister, one VSV and different throttle body. I can't remember which VSV output it is on the ECU... I THINK it's just labeled VSV1 or VSV2 in the service manuals... can't look right now and I don't have a MKIII here to check for ya.

Nathaninwa · 06-20-2011, 11:57 PM

Just looked at my pinout, and I do have the VSV1 output which is an intake air control. Mmmm, maybe Ill Ebay an upper half of an NA setup.

What about the VSV2, which is a fuel pressure up valve?

cre · 06-21-2011, 12:33 AM

VSV2 modulates the FPR's vacuum signal. The Cressida had it too... Most vehicles have one and you definitely want that in place.

Nathaninwa · 06-21-2011, 04:07 AM

OK, so I just picked up an NA intake.....still need to find one of them VSV valves, but I might be able to scour one up here at the house.

Im about out of money now for this project at the moment, got some dollars to put onto a T56 for my Volvo project. I should have enough parts to get it up and running far better than before.

Maybe anyone got a couple of them VSV valves kickin around?

cre · 06-21-2011, 05:20 AM

Heh, I've got a bucket of misc VSV's somewhere (probably in storage as I haven't seen it in some time... that or someone snagged it). Any 12v, two position VSV will do though. Just hit up a junk yard and grab a few VSV's from Toyotas, Hondas, Mercedes (Mercedes has a couple which only cost about $30 new... sorry, don't have the part numbers handy); You'll be looking for one with three nipples (one is for the vacuum constant source, one is closed when there's no power but opens when there is power and the other it normally open and closes with power). Typically they'll have a vacuum line running to two nipples and a breather on the third. I don't have time to go hunting, but if I come across one which will work I'll let you know... Still probably going to be quicker for you to just hit a salvage yard and grab a few for $5.

Nathaninwa · 06-21-2011, 05:47 AM

Cool, I am headed to the yard to test fit some stuff, so I head over to the Toyota section and check it out.

Thanks for the reply.

Nathaninwa · 06-22-2011, 01:40 AM

After reading up on the ACIS system its really cool, and I think Ill benefit 100% from the lowedn torque when Im out wheelin....I like to motor through second gear in lowrange and grunt though the trails, I have always lacked wot pulls from like 1500/2000 when under load. Doing some more searching brought me to TB swaps....I see the stock is a 60mm for a 3.0. Volvo has a 2.8l inline 6 that uses a slick 65mm throttle. Im a fabricator by trade so working the shaft to install the toyota tps finger and making an adapter plate to fit the Toyota tps should be pretty easy. If not, the stock volvo tps is a potentiomter, wire that in and use a switch like a nitrous activater for the idl pin. I would just have to setup and see what the voltages range from using the Volvo tps. But I think I can mod the Toyota unit on there.

Im also looking at the Pacesetter 5m header....I think I have room between the frame and bellhousing to get it in there.

Sonyps307 · 06-22-2011, 02:50 AM

I seen a guy use a TB from a newer mustang one of the daul butterfly ones and modded the n/a Y piece to fit it.

06-20-2011, 08:42 PM	#11
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	The Crassida's intake is different than the GTE's... it just looks similar. The Supra and the Crown N/A's (ALL YEARS of 7M and also the 2JZ series) ran a very different setup than the Cressida's thanks to the ACIS system and tuning differences based on it. Those flow numbers for the injectors aren't quite accurate. That's pretty much just a step above the middle of the VERY broad range that Toyota specifies for its injectors and rather hopeful for 20+yo injectors. The 89+ injectors are supposed to flow 276 to 340cc/min, pre89 aren't much less. Toyota also says a variance of as much as 36cc/min between injectors is fine... . It's irrelevant to me as I won't install used injectors unless they've been cleaned and blue printed... half of the ones you send to the shop are trash at this age. I misread though and thought you meant you were running the newer ECU with the grey plugs, not that it was used to build a Fields harness. The VSS is labeled SPD in Toyota's publications, you'll probably find more info looking for that. I think most of the Toyota speedometer heads from that vintage provide the same VSS signal. The oil signal may only be used in the GTE ECU, I can't recall. __________________ If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar --->

06-20-2011, 09:50 PM	#13
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	The ACIS system helps most with the lower torque curve but it also helps ensure a more consistent flow to all of the cylinders. The system just consists of the upper intake plenum (surge tank) and the "Y" pipe, a vacuum canister, one VSV and different throttle body. I can't remember which VSV output it is on the ECU... I THINK it's just labeled VSV1 or VSV2 in the service manuals... can't look right now and I don't have a MKIII here to check for ya. __________________ If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar --->

06-21-2011, 12:33 AM	#15
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	VSV2 modulates the FPR's vacuum signal. The Cressida had it too... Most vehicles have one and you definitely want that in place. __________________ If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar --->

06-21-2011, 05:20 AM	#17
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	Heh, I've got a bucket of misc VSV's somewhere (probably in storage as I haven't seen it in some time... that or someone snagged it). Any 12v, two position VSV will do though. Just hit up a junk yard and grab a few VSV's from Toyotas, Hondas, Mercedes (Mercedes has a couple which only cost about $30 new... sorry, don't have the part numbers handy); You'll be looking for one with three nipples (one is for the vacuum constant source, one is closed when there's no power but opens when there is power and the other it normally open and closes with power). Typically they'll have a vacuum line running to two nipples and a breather on the third. I don't have time to go hunting, but if I come across one which will work I'll let you know... Still probably going to be quicker for you to just hit a salvage yard and grab a few for $5. __________________ If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar --->

06-20-2011, 09:13 PM	#12
Nathaninwa Intake Join Date: Jun 2011 Location: Aberdeen, WA Posts: 43	Do you think I would benefit from the GE style intake? I use the motor a lot in the lower rom range as the truck has 4.88 gears and duel transfer cases. Is the internal tuned flapper a mechanical system or something wired into the ecu? That's crazy on the injector variances. I did have these cleaned on an injector cleaning bench but not flowed. I did just buy a set of Fuel Injecotr Clinics 2150cc injectors for my Volvo. The spec sheet only shows a difference of 2cc flow, nor matched within a half percent! Lookin to get 600whp out of them. Ill do some more research on the spd acronym.....either way its generated at the cluster so ill locate it and ship it over there to the ecu. Thanks for all your guys help.

06-20-2011, 11:57 PM	#14
Nathaninwa Intake Join Date: Jun 2011 Location: Aberdeen, WA Posts: 43	Just looked at my pinout, and I do have the VSV1 output which is an intake air control. Mmmm, maybe Ill Ebay an upper half of an NA setup. What about the VSV2, which is a fuel pressure up valve?

06-21-2011, 04:07 AM	#16
Nathaninwa Intake Join Date: Jun 2011 Location: Aberdeen, WA Posts: 43	OK, so I just picked up an NA intake.....still need to find one of them VSV valves, but I might be able to scour one up here at the house. Im about out of money now for this project at the moment, got some dollars to put onto a T56 for my Volvo project. I should have enough parts to get it up and running far better than before. Maybe anyone got a couple of them VSV valves kickin around?

06-21-2011, 05:47 AM	#18
Nathaninwa Intake Join Date: Jun 2011 Location: Aberdeen, WA Posts: 43	Cool, I am headed to the yard to test fit some stuff, so I head over to the Toyota section and check it out. Thanks for the reply.

06-22-2011, 01:40 AM	#19
Nathaninwa Intake Join Date: Jun 2011 Location: Aberdeen, WA Posts: 43	After reading up on the ACIS system its really cool, and I think Ill benefit 100% from the lowedn torque when Im out wheelin....I like to motor through second gear in lowrange and grunt though the trails, I have always lacked wot pulls from like 1500/2000 when under load. Doing some more searching brought me to TB swaps....I see the stock is a 60mm for a 3.0. Volvo has a 2.8l inline 6 that uses a slick 65mm throttle. Im a fabricator by trade so working the shaft to install the toyota tps finger and making an adapter plate to fit the Toyota tps should be pretty easy. If not, the stock volvo tps is a potentiomter, wire that in and use a switch like a nitrous activater for the idl pin. I would just have to setup and see what the voltages range from using the Volvo tps. But I think I can mod the Toyota unit on there. Im also looking at the Pacesetter 5m header....I think I have room between the frame and bellhousing to get it in there.

06-22-2011, 02:50 AM	#20
Sonyps307 Lexus & 550's Join Date: May 2010 Location: Baltimore Posts: 526	I seen a guy use a TB from a newer mustang one of the daul butterfly ones and modded the n/a Y piece to fit it.