This pickup continues to be impossible to start when it is warm. It rolls over well. It tries to start and RPM goes up then it dies almost like it is flooded. Holding gas down does not help nor does pumping gas.Do you have any idea what is going on?Millage has dropped off too. Vehicle has 180K mi.I had the Idle Air Control motor replaced at the Auto shop suggestion ($217) - no change.Mechanic said battery in key was going dead foiling the security system. Replaced battery - no change.I am really frustrated.
Country: United StatesMake: DodgeModel: DakotaYear: 2005Engine: 3.7L
Could it be a plugged catalytic converter? There is no oxygen sensor around this converter.
How about bad coils on the plugs? Plugs are new NGK platinum.
Have you had the system scanned for fault codes?
Yes, several times. Most recent was yesterday when they put in the Idle Air Control motor.There are no codes or engine light at the present time that I know of.
This sounds like you have a map sensor or coolant temp sensor that's out of range and is making the truck very rich when the engine is hot. They both can cause this type of problem and not set a code.
Will either one of them affect my milage? Has dropped from about 18 - 19 mpg to 14 - 16 mpg.
Yes they can.they both can make the system use alot more fuel
Which would you replace first?
From what you are saying I would replace the map sensor first.
ASE Master Tech Gold level Chrysler Status 30 years dealership exp
Well, this is extremely frutrating. This piece of (-----) pickup is still not working properly.It will not start when it is hot (engine turns over properly). It acts like it is flooded. Fuel milage is very poor (11 to 14 mpg on the highway). The diagnostic codes are PO 171 and PO 174 - Fuel system too lean both banks. Also, I can hear a clicking noise that sounds like a miss but the engine is running smoothly. It may be coming from the exhaust.Any new ideas"
Have you checked the fuel pressure?