OK i fixed my KR prob with a new motor mount!!! So i was excited the truck was running good after a couple years of KR so i went out and did a long burnout. after that i parked the truck cleaned up my tools went to drive the truck again and what do you know it runs like crap again!!! Truck will not idle, its dumping fuel into it, and has 0 *****... i tried 2 other map sensors i had off motors laying around and no luck, then i checked the volts and it has 5v. What else will make it run like this with this code. Im getting very close to parting this thing out.

 

I have never seen this before, but I have heard about vehicles that had this issue
Poor Acceleration From A Stop Or Detonation In Gear At A Stop - keywords DTC low MIL ping

Condition/Concern:

Customer concern of poor acceleration, detonation or "ping" at idle in drive or reverse, and/or possible DTC P0101, P0106 and/or P0121 set in the PCM. The vehicle will perform properly after attaining a speed of about 30 - 40 mph. The condition may also be described by the customer or the dealer as a hesitation, stall when putting into gear, surge on acceleration (similar to hitting fuel cut off or rev limiter). The ultimate cause may be a non-holding torque converter stator or damaged stator support shaft within the automatic transmission.

Recommendation/Instructions:

Important Note: Do not follow the below diagnostics until published SI diagnostics have been followed COMPLETELY. If all published SI diagnostics have been exhausted the following information may help in isolating a possible torque converter concern.

The following checks should be performed in the event that normal engine driveability checks have not resolved the detonation or "ping" at idle in drive or reverse, lack of power from a stop, stall, and surge on acceleration and or hesitation complaint.

The IAC counts throttle angle and/or MAP voltage and KPA should be compared to a like vehicle in park and in gear after reaching operating temperature. If the counts and map are high or throttle angle is open excessively in comparison this may be a result of high engine load and a torque converter and or stator support shaft related concern.

If the above information does not lead to resolution, follow torque converter diagnostics listed below:

The transmission oil cooler outlet line (line to the cooler) should be checked for excessive heat. The Tech II scan tool may be helpful on vehicles equipped with the transmission fluid temperature sensor in the cooler line (mainly front wheel drive). On vehicles that do not have the temperature sensor in the cooler line a temperature probe should be used to check the temperature. The temperature readings should be compared to a like vehicle with the same powertrain option content.

A stall test (brake torque) may point to a damaged torque converter; the stall rpm speed will be lower than a like vehicle. However, poor engine performance will also produce a lower stall speed rpm.

If the torque converter stator or stator support is suspect, the transmission should be removed and THE STATOR SUPPORT SHOULD BE INSPECTED FOR SPLINE DAMAGE. If the stator support splines are damaged the transmission should be repaired and new torque converter installed. If damage is not present on the stator support the concern is either internal to the torque converter stator or an engine performance concern.



DTC P0106
Circuit Description

The manifold absolute pressure (MAP) sensor responds to pressure changes in the intake manifold. The pressure changes occur based on the engine load. The MAP sensor has the following circuits:

• A 5-volt reference circuit

• A low reference circuit

• A signal circuit

The powertrain control module (PCM) supplies 5 volts to the MAP sensor on the 5-volt reference circuit. The PCM, also, provides a ground on the low reference circuit. The MAP sensor provides a signal to the PCM on the signal circuit which is relative to the pressure changes in the manifold. The PCM should detect a low signal voltage at a low MAP, such as during an idle or a deceleration. The PCM should detect a high signal voltage at a high MAP, such as the ignition is ON, with the engine OFF, or at a wide-open throttle (WOT). Certain vehicle models will also use the MAP sensor in order to determine the barometric pressure (BARO). This occurs when the ignition switch is turned ON, with the engine OFF. The BARO reading may also be updated whenever the engine is operated at WOT. The PCM monitors the MAP sensor signal for voltage outside of the normal range.

The PCM calculates a predicted value for the MAP sensor based on throttle position (TP) and engine speed. The PCM then compares the predicted value to the actual MAP sensor signal. DTC P0106 will set if the MAP sensor signal is not within the predicted range.

Diagnostic Aids

• Inspect for the following:

- Restrictions in the MAP sensor vacuum source

- MAP sensor seal is missing or damaged

- Vacuum hoses disconnected, damaged, or incorrectly routed

- Intake manifold vacuum leaks

- Vacuum leaks at the throttle body


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