Cause for lack of power from v6

Question edited for clarity.
Question moved to model category.

Sensor issues or wiring to them.

Code P1391 Dodge CMP or CKP Signal Intermittent ...

AutoCodes https://www.autocodes.com > p1391_dodge
Engine Light ON (or Service Engine Soon Warning Light) · Lack/Loss of Power · The engine may be harder to start · The engine may stumble or stall.

Cam Sensor Failure Causing no Start or Stalling : Dodge ...

RepairPal.com https://repairpal.com > Problems > Dodge > Dakota
On 3.7L V6 and 4.7L V8 engines the camshaft position sensor may fail causing the engine to crank but not start or it can cause intermittent stalling.

Dodge Dakota Vehicles With This Problem

RepairPal.com https://repairpal.com > Problems > Dodge > Dakota
On the 3.9L V6 and 5.2L V8, an intermittent connection in the crank position sensor wire connector can cause poor engine performance or the engine may crank but ...

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If your Toyota Gaia with 1AZ engine starts but has no power, it could be due to several reasons. Here are some steps you can take to diagnose and resolve the issue:

1. Check the air filter - A dirty air filter can restrict airflow to the engine, causing a lack of power. Replace the air filter if it is dirty.
2. Check the spark plugs - Worn or fouled spark plugs can cause poor engine performance. Replace the spark plugs if necessary.
3. Check the fuel system - If the fuel system is clogged or not working properly, it can cause a lack of power. Have the fuel system inspected and cleaned if necessary.
4. Check the vacuum system - A vacuum leak can cause a loss of engine power. Have the vacuum system inspected and repaired if necessary.
5. Check the throttle body - If the throttle body is dirty or clogged, it can cause a lack of power. Clean or replace the throttle body as needed.
6. Check the exhaust system - A clogged or restricted exhaust system can cause a lack of power. Have the exhaust system inspected and repaired if necessary.
7. Check the transmission - A slipping or faulty transmission can cause a loss of power. Have the transmission inspected and repaired if necessary.

is this a 4.3 engine, if so A common complaint with the Chevy 4.3 engine is that it doesn't idle well, it's loud and makes awkward noises. Examples of this are staling, lurching and poor acceleration. being you checked the plugs and wires. Look for corrosion, breaks, exposed wires and loose connections.Lack of oil will cause a knocking sound in the engine, stalling, poor acceleration and eventually engine break down. check all vacuum lines closely. good-day!

there are numerous reasons. lack of fuel, lack of spark, etc. how was it running before it stopped starting?

Cauases or fault codes are not cut and dry, but here are the possible causes of codes P0316 and P0306 which are related codes.
P0316 - Engine Misfire Detected on Startup
Symptoms - Engine Light ON (or Service Engine Soon Warning Light)
- Engine fails to start
- Engine runs rough Possible causes - Crankshaft Position (CKP) sensor harness is open or shorted
- Crankshaft Position (CKP) sensor circuit poor electrical connection
- Faulty Crankshaft Position (CKP)
- Ignition System
- Fuel Injectors
- Running out of fuel
- Fuel Quality
- Faulty Engine Control Module (ECM) P0306 - Cylinder 6 Misfire Detected Symptoms - Engine Light ON (or Service Engine Soon Warning Light)
- Lack/loss of power
- Hard start
- Engine hesitation
Possible causes - Faulty spark plug 6
- Faulty ignition coil 6
- Ignition coil 6 harness is open or shorted
- Ignition coil 6 poor electrical connection
- Clogged or faulty fuel injector 6
- Injector 6 harness is open or shorted
- Injector 6 poor electrical connection
- Improper spark plug 6
- Insufficient cylinder 6 compression
- Incorrect fuel pressure
- Intake air leak

Yea right what dealer wont tell i will tell, the 2.4 and 2.7 There is a TSB for this. They are to inspect for faulty CMP signal (cam sensor signal) which causes engine to idle rough or lack of power. they are to try shaking sensor connector to see if it affects operation and inspect for electrical connection for looseness and poor amle to female terminal pin fit. let me know if I help you out

Are there any engine codes ? This vehicle is OBD II ! A bad maf sensor will give you poor idle and lack of power and on fords often times no codes ! Another possible cause could be exhaust restriction due to a catalytic coverter being stopped up ? Previous misfires if driven long enough can trash a cat ! Let me know if any codes are present and what they are !

WEAK FUEL PUMP OR STOP UP FUEL FILTER.RESTRICTED EXHAUST LIKE STOPPED UP MUFFLER OR CATALYTIC CONVERTER.LOW ENGINE COMPRESSION.VACUUM LEAKS IN THE INTAKE MANIFOLD.BAD PLUGS.WEAK SPARK OR IGNITION .

please check whether you put "W"(Winter mode) instead of "S" .....