Question about 1993 Buick Regal

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After replacing tps devoleped a miss in motor no sensor codes showing new plugs and wires checked all fuel injectors for ohms show ok

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  • billhammons Jun 14, 2010

    tried this still got miss in high gear would the comp. module have something to do with this when i disconnect tps no miss when i reconnect miss is back tried 3 different tps but all checked ok and connector to them checks ok

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  • Buick Master
  • 6,826 Answers

Did you get the tps lever under the throttle pin,so it will move the tps?If so ,try loosening the screws and moving it one way ,or another,and hold it there while you tighten it,and try removing negative cable from battery for 20 seconds to reset the computer.

Posted on May 15, 2010

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  • Ronny Bennett Sr.
    Ronny Bennett Sr. Jun 14, 2010

    The mass air flow is most likely the problem

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2002. Why won't it start?


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2002 Chevy Cavalier misfire


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Have a 1995 Jimmy 4.3W MPFI with OBD2. Error is P0122 TPS sensor and have replaced that. Idles between 700 and 1200. Have replaced injector spider,fuel presure reg,EGR,new gasket, fuel pressure is about...


Hi William, The fuel pump pressure is correct but the fault reading you followed means low voltage signal into the TPS. Seems you may have replaced the wrong part? I would think that the problem is with the mass air flow sensor or the ECU as that is where the signal comes from. Regards John

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P1151 means a lean bank 2 O2 sensor
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I would check your fuel injector for fouling
When they foul the will develop a drip
Causing a fuel fluctuation that will have O2 sensors reporting rich and lean voltage changes
This causes the pcm to adjust injector pulses making them shorter and longer.
causing more fuel or less fuel.
From this condition you may see plug fouling.
Also check for leaking or faulty fuel pressure regulator or restricted return line.
Most of the time it wont be a bad O2 sensor the O2 sensor is just doing its job.
You also have already changed the plugs and Map so there already out of the way.
If this helps please give me some feed back
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Checked tps it is working on stem ok but


TURN OFF RADIO FIRST.REMOVE NEGATIVE BATTERY CABLE FOR A MINUTE OR TWO.RECONNECT NEGATIVE BATTERY.CRANK CAR UP LET IDLE TO GET OPERATING TEMPERATURE FIRST DONT ACCELERATE ENGINE.GIVE ENGINE TIME TO RECOGNIZE THE NEW TPS SENSOR.IF CAR STILL MISS REPLACE FUEL FILTER.CLEAN FUEL INJECTORS WITH A BOTTLE OF FUEL INJECTOR CLEANER BY POURING IT IN A FULL TANK OF GAS.DRIVE CAR AROUND SO CLEANER CAN FLUSH OUT THE INJECTORS.

May 15, 2010 | 1993 Buick Regal

1 Answer

96 olds ciera trouble codes p0122 p0300 missingthrough entire ran


A code P0122 may mean that one or more of the following has happened:
  • TPS not mounted securely
  • TPS circuit short to ground or another wire
  • Faulty TPS
  • Damaged computer (PCM)
Possible Solutions Some recommended troubleshooting and repair steps are:
  • Carefully check the throttle position sensor (TPS), wiring connector, and wiring for breaks, etc. Repair or replace as necessary
  • Check the voltage at the TPS (refer to a service manual for your vehicle for specific information). If the voltage is too low that is indicative of a problem. Replace if necessary.
  • If recently replaced the TPS may need to be adjusted. On some vehicles the installation instructions call for the TPS to be properly aligned or adjusted, consult a repair manual for specifics.
  • If there are no symptoms at all, the problem may be intermittent and clearing the code may resolve the issue temporarily. If this is the case then you should definitely check the wiring to be sure it's not rubbing on anything, grounding, etc. The code may come back.
A code P0300 may mean that one or more of the following has happened:
  • Faulty spark plugs or wires
  • Faulty coil (pack)
  • Faulty oxygen sensor(s)
  • Faulty fuel injector(s)
  • Burned exhaust valve
  • Faulty catalytic converter(s)
  • Stuck/blocked EGR valve / passages
  • Faulty camshaft position sensor
  • Defective computer
Possible Solutions If there are no symptoms, the simplest thing to do is to reset the code and see if it comes back.
If there are symptoms such as the engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.e. spark plugs). Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule. I would suggest spark plugs, spark plug wires, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs). In some cases, the catalytic converter has gone bad. If you smell rotten eggs in the exhaust, your cat converter needs to be replaced. I've also heard in other cases the problems were faulty fuel injectors.
Random misfires that jump around from one cylinder to another (read: P030x codes) also will set a P0300 code. The underlying cause is often a lean fuel condition, which may be due to a vacuum leak
in the intake manifold or unmetered air getting past the airflow sensor, or an EGR valve that is stuck open.

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