2000 Cadillac Escalade replaced all o2 sensor total 4 sparg plugs maf. Code says multiple misfire. Truck idles an runs rough

SOURCE: how do i fix my 2001 cadillac catera idle problem

The problems you are describing indicate to me that you likely need to replace the coil pack that runs from the spark plugs ,and the plug wires end up at it.It also may be the spark plug wires,get a water bottle and spray the wires after dark and if you get a light show from them then replace them,if not,replace the coil pack.

SOURCE: 2002 cadillac escalade ext misfire, shifting problems,

change spark plugs,check for valcum leaks. multiple misfire is spark plugs,coil or wires

keith howells

• 160 Answers
• Posted on Mar 08, 2011

SOURCE: 2003 2500hd rough idle and

Sounds like a defective knock sensor. These bring on multiple misfire codes with little change to performance. Check your oil level too, this can make knock detection codes come on unnecessarily. Hope this helped...

Marvin

• 85242 Answers
• Posted on Oct 08, 2012

SOURCE: Down to the final OB code on my truck...Po174

P0174 FORD - Fuel Injection System Too lean Bank 2http://engine-codes.com/p0174_ford.htmlForum CodePossible causes- Intake air leaks
- Faulty front heated oxygen sensor
- Ignition misfiring
- Faulty fuel injectors
- Exhaust gas leaks
- Incorrect fuel pressure
- Lack of fuel
- Faulty Mass Air Flow (MAF) sensor
- Incorrect Positive Crankcase Ventilation (PCV) hose connection Tech notes The codes is usually set when there is an intake leak after the air flow meter, before replacing any parts check for loose or broken hoses and intake gasket leak. On Ford some models dirty air filter, and dirty or faulty air flow sensor are the cause of the problem.

It's a very common problem for the Ford Windstar. Here a link to a web site with information how to repair:
When is the code detected?- Fuel injection system does not operate properly.
- The amount of mixture ratio compensation is too small. (The mixture ratio is too lean.) Symptoms- Engine Light ON (or Service Engine Soon Warning Light)
- Excessive Fuel ConsumptionP0174 FORD Description The Powertrain Control Module (PCM) monitors the engine Air/Fuel mixture ratio, the actual mixture ratio can be brought closely to the theoretical mixture ratio based on the mixture ratio feedback signal from the heated oxygen sensors 1. The PCM calculates the necessary compensation to correct the offset between the actual and the theoretical ratios.

In case the amount of the compensation value is extremely large (The actual mixture ratio is too lean.), the PCM judges the condition as the fuel injection system malfunction and light up the engine light.

Michael Van Der Burgt

• 66 Answers
• Posted on Nov 04, 2013

SOURCE: what causes 2000 taurus engine rough idle but no codes

I had a head gasket going when I have a rough idle. Just weeping coolant past the number 1 cylinder. When I pulled the head the piston was all shiny and steam cleaned. $500 dollars all good now.