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Re: 1994 xj6 4.0 hard to start,runs rough and no power...
When this problem happens I would check the timing. As your question was not fully reproduced, I would appreciate a more detailed description of your problem. It could be the onboard computer has a fault and you are getting warning lights and the more obvious symptoms as a result. Michael
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The only thing these components have in common is the ground wires. There are many grounds on a vehicle. But the main three are the battery to body, battery to engine and engine to body. These are fairly large wires/cables. They should be checked with an ohm meter. I replace or repair any wires that have more than 5.0 ohms of resistance.
Fuel injector may be dirty. Put a container of fuel injector cleaner in gas tank (10 gallons) and run for awhile. May improve, I've had that problem and cleaning the injectors worked. Available for a few $$ at most auto supply stores. Worst case if that does not work may be to suspect the fuel pump and/or vacuum hoses.
Sounds like a fuel delivery problem if it is associated with the low fuel warning light.I wonder if it is fuel gauge isn't really relaying soon enough that you are low on fuel and by the time it does you are running on fumes.it could be a fuel filter that has water ingress or debris from an almost empty tank.who knows?First get the car checked at any garage for the diagnostic error codes that will be stored on the onboard ecu.
this is usually a free service.the limp mode episodes will be recorded by error codes which will pinpoint fuel issues, electrical issues etc.Otherwise you will be trying to go through a fix list that costs you time and money .
You must have a check engine light on in your dash. You first need to pull up the code. I will assume your trans is an automatic. If so, when your trans goes into limp mode, if you stop , shut off your motor, and start again, does your car run OK again, till the next time it goes into limp mode. If so you have a bad trans solenoid. Sometimes this solenoid is on the outside of a trans and sometimes it's on the inside. If inside you would have to drop the pan, and valve body, because it's on top of the valve body. The fan is a separate issue. GOOD LUCK FRIEND.
ok lets start with the codes they say your getting. P??? which 1's and how many. there are few o2 sensors, are they next to the Exhaust next to the converter? MASS AIR FLOW -MAF use this, for now i am guessing, until i see the correct codes your are getting. this could be the 1 you may have below, please read it........
Faulty mass air flow sensor
- Intake air leaks
- Dirty mass air flow sensor
- Dirty mass air filter
- Mass air flow sensor harness is open or shorted
- Mass air flow sensor circuit poor electrical connection
Before replacing the mass air flow sensor, try replacing the air filter and cleaning the air flow sensor with low compress air or mass air flow sensor cleaner. Reset code and drive vehicle. If the code comes back, it may be necessary to replaced the mass air flow sensor.
possible symptoms Engine Light ON (or Service Engine Soon Warning Light)
- Engine stall
- Engine running rough
- Excessive fuel consumption
- Excessive smoke
the code is generated when An excessively high voltage from the sensor is sent to Engine Control Module (ECM).
its a hard code which has caused the vehicle to go into limp mode which is a safe mode for cars so to speak go to pep boys or wherever a scan tool can be accessed and have them clear it and they can tell you the code that was popping up
Code 24 is a vehicle speed signal sensor fault, the sensor most likely does not provide a useable signal until about 25 MPH, when the computer doesn't see any signal after that speed it turns on the light. Make sense?