my check engine light comes on any ideas?

Question

working on a 94 jeep wrangler 2.5 liter. heres how it works. driving along motor running good. without hitting a bump or changing gears or anything the check engine light comes on and the motor loses power. it almost acts like the timeing has jumped way retarded but I get out wiggle a few wire connections and start it back up and it will be fine for a little while longer before doing it again. any suggestions?

Answer 1

Could be a lose battery cable.

Answer 2

You can take it to NAPA, Autozone, Advance, or PEP Boys It cost around 40 dollars to have codes read out last time I did it.
That will tell you which sensor circuit is giving you trouble.

But, before you do that check all your connectors for corrosion Unplug and plug them back up a couple times to make sure you are getting a good connection.

Also when you plug it back together make sure all the pins are all the way seated. If not push each pin in using a small screw driver.
I've ran into cases where the prongs which secured the pins in the connector were bent or broken not holding the pin in place letting it slide back not getting a good connection when plugging the two connectors together.
They would barely be touching a good bump would jar them apart enough to break the circuit. for a split second or until you wiggled the wires making them make connect again.

Also if you have been out playing off road in it i.e. the mud holes etc. you could have corrosion or moisture in the connectors causing them not to make good contact.

Had that problem in a Dodge brought to me to work on. Corrosion on connectors so bad the headlights would not work.
By the way lent my code reader to someone who lives in Dallas and hasn't brought it bad yet. Cheaper just going and getting read out than driving all the way to Dallas to get it..

Answer 3

I paintings in a storage, and in spite of universal beliefe, a Code Reader isn't something extra then a wrench. Say the code is a misfire code, it supply the technician a place to start, yet there are nonetheless many stuff which would be causign that misfire. Take it to a storage and have them diagnose the difficulty and restore it appropriate. regardless of in case you recognize the code you nonetheless could decide why its on. Mechanics at the instant are not con artistes in spite of universal have faith. there is one which will supply us all a foul call, yet mechanics at the instant are not stupid human beings, and a properly knowledgeable mechanic could have that difficulty soveled in an hour if its a undemanding difficulty, if its extra progressed it may take longer, thats to not say they arn't a competent technician, its purely announcing the difficulty is hiding itself sturdy. maximum shops in my area will can charge an hours labour commencing to diagnose a difficulty. As an factor observe. O2 sensors rarly fail except broken. i've got had to interchange perchance 30 interior the final twelve months. The examine engine easy will activate if any distruption is stumbled on which will avert the preformance of the engine, almost all are are labeled into the emmisions catagory, yet whilst gasoline injecors are clogged and inflicting a misfire, that is going to set the sunshine off too. yet in spite of the incontrovertible fact that, it will be burning undesirable inflicting undesirable emmissions, it purely relies upon on what area of the line your difficulty is on.

Answer 4

A short in your wiring harness or bad plug wires

Answer 5

Sounds like spark plug wires might need replaced, that's where I would start

Answer 6

EGR (exhaust gas recirculation) valve needs cleaned or replaced.

Answer 7

Take the car and let the dealer mechanic take a look and take care of the problem.

Answer 8

take it to auto zone or advance to find out what code is tripping..