I changed MAF sensor twice, check all vacuum lines sprayed cab fluid everywhere. Car hesitates between 1000 and 2000 any idea's will be greatly appreciated.

 

Hopefully a mod will move to the right forum.

What are the fuel trims (see the many posts)?

 

Welcome to the forum Terry,

I've moved your question from General Tech Help to X350 forum. Members here with the same model will be able to help.

Even though you have been a member for more than five years, I see you have posted in both X-Type and XK/XKR forums. Please follow this link New Member Area - Intro a MUST - Jaguar Forums - Jaguar Enthusiasts Forum to the New Member Area - Intro a MUST forum and post some information about yourself and your vehicle for all members to see. In return you'll get a proper welcome and some useful advice about posting to the forum.

Graham

 

Terry,

Here's the decodes:
P0171: Bank 1 combustion too lean
P0174: Bank 2 combustion too lean

The possible causes are:
1. Engine misfire
2. Air intake leak between MAF Sensor and cylinder head
3. Fuel filter / system restriction
4. Fuel injector restriction
5. IP Sensor fault (low fuel pressure)
6. Low fuel pump output
7. HO2 Sensor(s) harness wiring condition fault
8. EFT Sensor fault (low fuel temperature)
9. MAF Sensor fault (low intake air flow)
10. Exhaust leak (before catalyst) ECM receiving incorrect signal from one or more of the following components:
ECT Sensor
MAF Sensor
IAT Sensor
IP Sensor
EFT Sensor
TP Sensor

Graham