EDD Skitz
Probationary Member
- 4
- 0
- Jul 16, 2014
-
Binghamton,
New_York
I've searched and searched, can't seem to find an answer or anyone who's had this issue before...
My issue is adjusting my tps sensor (I think)
I am also mechanical engineer and have tons of experience with cars, also have the FSM's and a Haynes manual, I've searched the big forums and asked around to no avail.
1991 model year eclipse gst
made August of 90.
My ecu is throwing a code 14, idle stop switch is adjusted properly, ISC checks out... for the life of me I can not get the tps set to .48-.52vdc. It reads .09-.1 at best. If I move the throttle I can get it to spec, but the damn throttle is almost wide open.
I just picked up a new tps and am 100% sure it is the correct one, and all tests of both the new and old show that it's good but same results.
What else could be causing this?
So, in a little more detail as to what I've done...
I tried setting the tps with jumpers, concerned that it would alter the voltage I use in line crimp splices today to tap into the harness just behind the tps to be sure to get 100% correct readings.
I have a brand new tps and the stock one on hand. Both have the the same static resistance, both vary resistance between 1.1k ohms and 4k something (in spec as per the FSM) both read somewhere between .04 to .10vdc key on engine off (also engine on) and at wot both read 4.94vdc.
Harness side reads 5vdc supply, so that's a .06vdc discrepancy (negligible in my experience and given the operating ranges of the sensors and ecu.)
Operation of the tps yields smooth resistance, however it seems as though after about 60% turn of the tps it suddenly reads 1.5vdc and ramps quickly to 4.94vdc, but I can't find info on the voltage slope, only the resistance slope. But given the resistance slope, seems like it should be more linear in the voltage slope than it is.
Keep in mind these readings are the same for the old tps and the brand new one. Makes me wonder what threw the code in the first place.
Also had the ecu out to ecm link for servicing and they said it was good.
My issue is adjusting my tps sensor (I think)
I am also mechanical engineer and have tons of experience with cars, also have the FSM's and a Haynes manual, I've searched the big forums and asked around to no avail.
1991 model year eclipse gst
made August of 90.
My ecu is throwing a code 14, idle stop switch is adjusted properly, ISC checks out... for the life of me I can not get the tps set to .48-.52vdc. It reads .09-.1 at best. If I move the throttle I can get it to spec, but the damn throttle is almost wide open.
I just picked up a new tps and am 100% sure it is the correct one, and all tests of both the new and old show that it's good but same results.
What else could be causing this?
So, in a little more detail as to what I've done...
I tried setting the tps with jumpers, concerned that it would alter the voltage I use in line crimp splices today to tap into the harness just behind the tps to be sure to get 100% correct readings.
I have a brand new tps and the stock one on hand. Both have the the same static resistance, both vary resistance between 1.1k ohms and 4k something (in spec as per the FSM) both read somewhere between .04 to .10vdc key on engine off (also engine on) and at wot both read 4.94vdc.
Harness side reads 5vdc supply, so that's a .06vdc discrepancy (negligible in my experience and given the operating ranges of the sensors and ecu.)
Operation of the tps yields smooth resistance, however it seems as though after about 60% turn of the tps it suddenly reads 1.5vdc and ramps quickly to 4.94vdc, but I can't find info on the voltage slope, only the resistance slope. But given the resistance slope, seems like it should be more linear in the voltage slope than it is.
Keep in mind these readings are the same for the old tps and the brand new one. Makes me wonder what threw the code in the first place.
Also had the ecu out to ecm link for servicing and they said it was good.
