95,000 miles on engine. Needs spark plug replacement at 102,000 miles, but I don't think that's the solution - sensor?
Try using a higher quality fuel use 93/91 and use the fuel for 2 tank fill's also add a bottle of sea-foam to the tank for the two times you filled with the higher quality fuel. Most likely it's the ethanol in the fuel slowly clogging you're injector's as well carbon build up. The sea-foam will help with this.
SOURCE: acceleration hesitation
Depends how long since your last tune up and mileage. I would do a normal oil change, oil filter, air filter and plugs. If she still does it, try checking for a vacuum leak. Start the vehicle and spray "lightly" carb cleaner around your vacuum lines. If you have a leak the engine will increase in idle suddenly. Replace the line or part. AS A LAST resort and pretty rare is the distibutor. They usually run about 75.00 to 110.00...hope this helps.
SOURCE: 1998 Jeep Wrangler Sport codes P0121 and P0122
did you check voltage to sensors if you need help with proedure, contact me, or you may try patrs houses on line in how to section.
SOURCE: 2005 Jeep wrangler w/rough idle and hesitates when you accelerate
try fuel injectors....run a bottle or two with full tank through it and see if that dont solve the problemo.....
SOURCE: 2002 Jeep Grand Cherokee Lardo misfiring
You say you changed the cam sensor. A1391 code is a crank sensor on the top of the trans. bell housing.
SOURCE: need to know how to test MAP sensor
First thing to do is to pull the codes than take it from there.
The symptom you describe sounds more like an EGR valve stuck open and riching out the mixture.
There are two types of Map sensors . The analog and the frequency signal type.
First let me take a step back and tell you what this thing does. It basically measures manifold vacuum or engine load and turns it into a voltage signal ECU can read. This sensor usually gives you dentonation, poor fuel economy and poor driveablilty when its gone bad sometimes it will give you transmission problems.
Now if you don't know what type of Map you have check the reference voltage( usually aboubt 5volts) Then check signal Voltage. If the signal voltage never changes ( about 2.5 volts) then you have the frequency type.
Analog sensores are usually located on the firewall near the air cleaner and have a vacuum hose attached to it. To test this one your gonna need a Digital voltmeter and a hand held vacuum pump AND THE SHOP MANUAL TO GIVE YOU THE EXACT TESTING PROCEDURE AS WELL AS THE SPECS.
Good luck ( I really think its EGR)
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