Bad MAP sensor

SOURCE: Rough idel

OK, Im sensing many issues here. I will list the most important check points below that you will need to inspect thoroughly. I recommend running a code check as well if possible. the check points are listed as follows..

Check Points---

1. Inspect the EGR Valve-- A Improperly Functioning or Faulty EGR Valve will contribute to misfiring and instant death of the engine.
2. Inspect all Fuel injectors-- Dirty or Worn Fuel Injectors can cause rough idles as well. inspect accordingly.
3. Inspect the Idle Air Control Valve-- Damaged, Loose, or Faulty Idle Air Control Valves will cause rough idle.
4. Inspect the idle speed actuator-- It could be loose or faulty.
5. Check the throttle position sensor. this is a know problem spot when the idle is erratic or unstable.
6. Make sure you are running a clean air filter as well. this is a simple check that may fix your idle issue as well.
7. Inspect the PCV Valve-- This device may be clogged or damages. make sure the hose is not bent.
8. If there is a Carb present, i would run a thorough check on all lines and choke assembly as well.
9. Inspect the valve assembly for Burned, Worn, or Sticking Exhaust Valves. this can cause back firing and rough idle as well.
10. I also recommend checking the timing chain for slippage or worn timing gears as well. this can cause your symptoms.
11. INspect the fuel pump for faults.
12. If you have run through the above list to this point and still have not seen anything unusual, i will now recommend pulling the cam to check for worn Camshaft Lobes. this will screw up valve timing and affect the engines idle greatly.
13. if a distributor is present, i would check the ignition points for worn or incorrectly set points.

This concludes the check list. you will find the problem in one or all of the areas stated above.

Please rate and god bless:)

SOURCE: car wont start, got code p0172, got fuel, spark

PCM detect an excessively rich condition