Code 22
07-16-2014, 07:22 PM
#1
Code 22
So the other day a few times the check engine light would come on when i came to stop stay on for like 10 seconds and go out would also kinda run a little funny for a second. So even tho the check engine light wasnt on today I used my laptop with ebl p4 to get the code which was code 22 tps low. I noticed that even when floored and key off it wouldnt read over about 35%. So i get out of the car go under the hood sweep it a few time by hand and go back in the car and it reads fine. Take it on a ride and all is going well, i go in a store and come out and check engine light on code 22. So went back home and noticed while idling it was reading 9% just coasting without my foot on the throttle. Park the car turn it off put key back on and working normal.
Voltage when working normal reads .54 at idle and over 4V WOT
any ideas?
Also noticed car is sort of charging erratic like mid-13's sometimes then returns above 14. Wonder how that comes into play here if at all...
Voltage when working normal reads .54 at idle and over 4V WOT
any ideas?
Also noticed car is sort of charging erratic like mid-13's sometimes then returns above 14. Wonder how that comes into play here if at all...
07-17-2014, 11:22 AM
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Car: 1989 IROC & ROLL-Z
Engine: L98 Vortec FIRST TPI
Transmission: T56, Mech Speedo
Axle/Gears: G92 J65 3.27
Re: Code 22
Surely.
I would test the TPS. If it checks out fine, look over the wiring real good as it may have an intermittent short.
To test TPS,
Turn on ignition, but don't start the engine.
With a scanner: plug in the scanner and read the TPS voltage. It should be 0.54Volts +/- 0.075Volts
With VOM and jumper wires: disconnect the connector from the TPS. Using your jumper wires, make a connection allowing some room for the VOM terminals to contact the jumper leads and read the TPS voltage.
If out of spec, loosen the two screws holding the TPS to the throttle body, and slightly rotate the TPS up or down, reading the voltage until it comes into specification. Tighten screws. Using the throttle lever, rotate the throttle to WOT (wide open throttle). The TPS voltage should be over 4.0 volts. Close the throttle again, and then slowly open it to WOT, observing the voltage reading. It should increase progressively and in a linear fashion. If it sticks or jumps or falls off at all while doing this check, that could mean a bad TPS switch and could be a cause of stumbling and driveability problems.
After setting the correct voltage, turn off ignition switch. Remove jumpers/scanner and reconnect the TPS connector as required.
I would test the TPS. If it checks out fine, look over the wiring real good as it may have an intermittent short.
To test TPS,
Turn on ignition, but don't start the engine.
With a scanner: plug in the scanner and read the TPS voltage. It should be 0.54Volts +/- 0.075Volts
With VOM and jumper wires: disconnect the connector from the TPS. Using your jumper wires, make a connection allowing some room for the VOM terminals to contact the jumper leads and read the TPS voltage.
If out of spec, loosen the two screws holding the TPS to the throttle body, and slightly rotate the TPS up or down, reading the voltage until it comes into specification. Tighten screws. Using the throttle lever, rotate the throttle to WOT (wide open throttle). The TPS voltage should be over 4.0 volts. Close the throttle again, and then slowly open it to WOT, observing the voltage reading. It should increase progressively and in a linear fashion. If it sticks or jumps or falls off at all while doing this check, that could mean a bad TPS switch and could be a cause of stumbling and driveability problems.
After setting the correct voltage, turn off ignition switch. Remove jumpers/scanner and reconnect the TPS connector as required.
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