How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Greg Your Own Question
Greg
Greg, Technician
Category: Car
Satisfied Customers: 1118
Experience:  Automotive diagnostic tech
29331485
Type Your Car Question Here...
Greg is online now

year 2000 cherokee 4.o six cylinder petrol horendeouse fuel

Customer Question

year 2000 cherokee 4.o six cylinder petrol
horendeouse fuel usage
m.o.t. failure
emissions 9.99 at idle
looks like sensors have been removed and tested
all have 5 volt supply
plugs are new
Submitted: 3 years ago.
Category: Car
Expert:  Greg replied 3 years ago.
Name is Greg, My goal is to provide you with excellent service – if you feel you have gotten anything less, please reply back,

Is the check engine light "ON" when the engine is running .

How many miles do you have on this engine .

Have you checked for malfunction codes .

Greg
Customer: replied 3 years ago.

engine light is not on


fault codes refer to open circuit in injectos 1 3 6 intermitent

Customer: replied 3 years ago.

milage 98232

Expert:  Greg replied 3 years ago.
Hi Chris .

Strange that you have no engine light but have codes for theb injection circuit .

Can you please get me the codes .

Do you have LPG fitted or had one fitted .

Rgds Greg
Customer: replied 3 years ago.

no l.p.g


code reader away at moment


codes fro injectors could be historic and from previouse problems

Customer: replied 3 years ago.

whitch sensor controls mixture enrichment for cold starting

Expert:  Greg replied 3 years ago.
Hi Chris

There are a few sensors that input to the PCM to out put fuel / air mix .

Clear codes and recheck for codes .

With the scan tool read the Long and short term fuel trims .

O2 sensors fuel/air mix ratio data is sent to the PCM to calibrate fuel and air .

Check that the fuel system 1 is in CL and not OL

Rgds Greg