'92 VP ute problems, gas and petrol, engine light, cutting out, choppy acceleration.

[Burky]

I've had this ute for two weeks now and over the last two days I've been having major problems.

Since getting the ute I've replaced/topped up all the fluids and filters, replaced plugs and leads, thermostat and battery along with a few hose connectors.

The lead and plug change got the gas running properly although today it cut out twice and then refused to stay running on gas, when running on petrol it somewhat hesitates to accelerate and comes close to cutting out.

When running it on petrol the engine light stays on, when running on gas the engine light comes on and off every so often.

I've bridged the pins in the plug under the passenger side kick cover and got the following codes (with the fuel system selector switched to petrol)

Code 13 - Oxygen Sensor (O2)
Code 21 - Throttle Position Sensor (TPS) - Voltage Too High
Code 22 - Throttle Position Sensor (TPS) - Voltage Too Low
Code 44 - Oxygen Sensor Lean (O2)
Code 45 - Oxygen Sensor Rich (O2)

I'm at somewhat of a loss and low on cash, I'd prefer to fix anything I can myself, but I'm really not sure what really needs to be done or what the real problem is and if the codes I got coincide with the problems I've been having.

Any advice would be appreciated.

[Burky]

I've just tested the TPS and it seems to be fine, which is annoying as the symptoms of a bad TPS are what I'm getting.

[vns5speed]

have you reset the ecu after checking the tps if not give the oxygen sensor a clean and reset the ecu and see if the codes come up

[Burky]

have you reset the ecu after checking the tps if not give the oxygen sensor a clean and reset the ecu and see if the codes come up

I've reset the ECU and am only getting code 22 now, TPS voltage too low.

I've been told the oxygen sensor goes off with LGP conversions as LPG runs lean.

[strgas]

check and clean your engine earth connection , get use to check light coming on when on gas or wire a relay to the check light for gas operation . TPS voltage can be due to high or low resistance in the sensor or the wiring to and from the tps .

[Burky]

Have just finished removing the TB and tested the TPS free from anything else, the readings were allot lower and jumpy.

Reset the ECU again and am still getting the 22 code.

have adjusted the idle screw so it doesn't cut out until i get the sensor.

EDIT:also cleaned IAC and the whole TB

[Burky]

cleaned the TB and replaced the TPS, still no improvement, I've bitten the bullet and dropped it off at a mechanic.

[vn1989]

SAME PROBLEM AS MINE... i get code 22 but iv replaced my tps and its sill there.. changed the ecu, changed the wiring loom when i got rid of the gas so none of the wiring is bad.. its really got me stumped and im sick of it.. did the mecanic fix it or know what it was cause i want to fix mine.. it also nearly stalls when i put it into gear could that be caused by the tps?

[VR007]

GOT THE SAME PROBLEM AS WELL... im running gas and fuel, yesterday i started the car on fuel it was idling and then just stalled. Now it wont start, tried resetting the computer with no luck. What did ur machanic find wrong with ur car?

[vn1989]

yeah i had no problem with any thing before i removed the gas no engine light (never tryed running it on gas only petrol) but as soon as i removed the gas first time i started it boom engine light

[Circlotron]

I've been told the oxygen sensor goes off with LGP conversions as LPG runs lean.

If there is no mixture control feedback from the oxygen sensor to the gas it would probably bring up the engine light.