so my throttle was sitckin a bit, so i cleaned it. there was nastiness all over it.

now, my idle is sitting at 1450ish.

any ideas?

info: b16a3. idle screw is as tight as can go. my tps is throwin a code. any link between the 2?

 

TPS wiring could certianly cause a problem like this. Does the idle just sit at ~1,500 or does it bounce up and down? So you have confirmed that your ECU is throwing a code 7? Oh yeah this is a DelSol correct(Just a guess based on the engine code)? Or at least an OBD1 vehicle?

 

yep. its the del sol. obd1.
sits solid at 1500 (give or take a few)

 

Ok cool, yeah sounds like the TPS is the issue, my next post should help you clear it up, but it will tak me a good 20-30 minutes to type the whole process up for ya..

 

well, i dremmeled off the god-forsaken rivits, and replaced them with bolts so i could adjust the tps.
i can not get the tps to go under .5 volts with a closed throttle. sounds fucked up?

i think so too.

 

Ok here goes nothing. If you have any questions regarding this please feel free to ask.

1.Disconnect the 3p connector from the TPS

2.Turn the ignition switch to the ON position.

3. Measure voltage between the YEL/WHT (+) terminal and the GRN?WHT (-) terminal.

4. Is there approx. 5 volts? If yes go to step 10. If no proceed to next step.

5. Measure voltage between the YEL/WHT (+) terminal and a body ground.

6. Is there approx 5 volts? If yes repair the short/open in GRN/WHT between the ECU (pin D22) and the TPS. If no proceed to next step.

7. Turn ignition switch off and gently open the back of the ECU clips (Just the D clip in this case) without unplugging them and turn the ignition switch back to the ON position.

8. Measure the voltage between the D20 (+) terminal and the D22 (-) terminal.

9. Is there approx 5 volts? If yes repair the short/open in YEL/WHT between ECU (pin D20) and TPS. If No substitute a known good ECU and if prescribed voltage is now available, replace the origional ECU.

(This ends that side of the flow chart)

10. Turn the ignition switch off and reconnect the 3p connector to the TPS.

11. Turn ignition switch off and gently open the back of the ECU clips (Just the D clip in this case) without unplugging them and turn the ignition switch back to the ON position.

12. Measure the voltage between D11 (+) terminal and D22 (-) terminal.

13. Is voltage 0.5 volts at fuill close throttle and approx 4.5 volts at full open throttle? NOTE: There should be a smooth transition between 0.5 volts and 4.5 volts as the throttle is depressed.

14. If voltage prescribed in step 13 is not present
-Replace the TPS
-Repair short/open in RED/BLU (PNK/BLK at ECU) wire between TPS and ECU (D11)

15. If voltage prescribed in 13 is present replace ECU with known good ECU and if symptom goes away replace the origional ECU.

Now your probably asking how the **** do I find the D22 and D11 and D20 pins. Well pull down the carpet on the passanger side kick panel and unbolt the 4 10mm bolts holding in the ECU. The D clip will be the farthest to the right if your looking at the wire side of the connectors with their locking clips up. You will want to gently probe these areas with the multi-meter to take the required measurements.

The pin numbering is as follows, again when looking at the clip from the wire side with the locking clip up.

The top row is your odds with D1 all the way to the left and D21 all the way to the right. Bottom row is evens with D2 at the left andD22 at the right. So D11 is top row very middle pin. D20 is the bottom row second from the right and D22 is the farthest right bottom row.


Hope this helps, I'll be checking in to see if you have any questions. This should clear everything up for you as long as you don't skip any steps and follow the flow of the troubleshoot. Good luck!!

 

Did you every disassemble the throttle body? If so you may have put the springs back in wrong. Also when installing the TPS the little prong that moves on the sensor has to be between the two raised sections inside the TB. If you can't get .5 volts you might be installing it just outside the raised section on the TB.

 

the extend of the dissasembly of the throttle body was removing sensors, and the 2 screws to clean the butterfly. never fucked with the springs.

i will check all voltages tomorrow, and make sure everything is right.
thank you for all the help.

 

Yeah then that couldn't be the problem. I disassembled mine a while back and put the shaft in backwards so nothing worked then. I'm just trying to narrow this down to all possible culprits. I know when installing the TPS in order to get the prong thingy on the TPS to line up in the groove you have to turn it to a point where the screws wouldn't go in. Basically there will be some tension on the sensor at closed throttle..