- This topic has 20 replies, 8 voices, and was last updated 12 years, 8 months ago by
.
-
Topic
-
-
Replies
-
I checked out your vid. you really should have pulled the codes so we could see what they are/were. perhaps you can drive it ( somewhat ) and get the cel to come back on then pull the codes. that said you should test the following- fuel pressure key on engine off – key on engine running. check for vacuum leak(s) belt noise could be a bearing going out in the alt or p/s pump or belt tensioner ( use a stethascope or long screwdriver or long wood dowel ) to listen to the components. also check the belt condition. the wire/sensor you showed looks like a coolant temp sensor ( does the temp guage work ) perhaps someone pulled the sensor and just plugged the hole. . how long has the jeep had this drivability prob? if the coolant temp sensor is missing the ecm won’t be able to read the eng temp and will cause running issues. be a good idea to check the condition of the plugs , wires , cap, rotor. check these things out then let us know what you find so we can assist you further. try and get us those codes ( you can type them into the search box as well )
only code i get is o2 sensor and that is because its missing and has been from the time i have had it . all the gages work the problem has been going on for a week or so . tps and cam sensor are testing good wires and plugs look good cap and roter button look good too . i am going to test the cps today before work and maybe see what the fuel filter looks like
For the ‘squeaking’ noise here is a video that might help with that.
http://www.youtube.com/watch?v=ZSTZdTAB_As
As for the ‘bogging’ the first place I would start is check for vacuum leaks as these can cause all kinds of performance issues, BTW the PCV system should be included in this so you might consider replacing your PCV valve if it hasn’t been replaced in a while.
http://www.youtube.com/watch?v=9CPqbaSgcok+Which o2 sensor is missing? If it is a pre-cat o2 sensor, you need to replace it as the PCM uses readings from this sensor once the vehicle is in closed loop.
i will watch the videos eric and its the post cat o2 if i checked correctly the cps is not showing any ohms when i tested so that might be my problem
Quoted From college man:
the hanging sensor looked like your low pressure switch for your a/c. does the a/c work?
I agree, it doesn’t look like an ECT sensor. I’m not sure why you are condeming the CKP. Who told you it was bad? You can’t really ohm them out, you need a scope to read them properly. Other than that, I agree with above suggestions. Also, how did you check the ignition coil? And the fuel filter wouldn’t cause random no starts, but it never hurts to replace it.
You also may went to check your fuel pressure to rule out a faulty check valve in your fuel pump.
Hard starts can also be caused by faulty fuel pressure regulators or bad ECT sensors.
I agree with Dreamer2355. A hard start does sound like a fuel pressure regulator issue. Just a guess here but when under acceleration it bogs down, it could be the regulator bypassing the fuel so the injectors arent getting the full pressure they need, just a thought. Also try tossing in some injector cleaner. I had a buddy years ago whose wifes car needed new injectors because she filled up at several different stations, couldve been another issue with it too. So yeah, try and get those injectors clean cause thatll cause an issue and if it comes down to it hookup a fuel system pressure gauge and see whats up with that.
Good Luck and Happy Wrenching
i have watched and read allot about testing the ckp and its suppose to have between 200 and 500 ohm and there is nothing . i have tested the coil and it seems a little week i looked uo how to test a coil and found the ohm range that it is suppose to have at the to pins at the back and from the pos pin and the main out . i got 0.01 ohms at the pins at the back which should be 1.1 and got 11.somthing from the out when its suppose to be 12. something . i haven’t had the no start issue since i cleaned the throttle body and iac valve still have the hard start and stalling when first starting and a rough idle sometimes but the worst is the no power and the serious bogging down from a stop to accelerating. like the fuel is cut off until i get moving a bit then it seems to be ok still with power loss and if i floor it it does the same thing no matter what speed im doing . it is misfiring when idling but will recover . the fuel filter shouldn’t be to dirty other than the normal gunk no rust due to the plastic gas tank . but a 12$ new one wouldn’t hurt . when i get payed i am going to pick up some carb cleaner and a coil .i will try to get a video today of the bogging down wile im driving to give everyone a better look at what is going on . thanks for the suggestions and help its much appreciated
i was re-tracing my steps when i checked my plug wires and remembered that my fingers where too wet and cold to get the wires of the plugs and never checked the plugs so today i checked them today and they are hurtin 1 more so than the others so i am going to try new plugs and a coil wouldn’t hurt either and see if that does the trick if any thing it will rule them out ! oh yes and some carb cleaner to check for vac leak testing as well as fuel line cleaner
yes it has every thing it needs . i haven’t had a problem starting since last week its just a rough idle and hard starts along with the hesitation upon acceleration . i re checked things today and found that my plugs where bad 1 more than the others so Thursday i will be getting plugs and a coil just to be sure.
If you have a misfire check for vacuum leaks as suggested, you might also want to check for voltage leaks. Don’t bother checking coil resistance because those tests are useless and tell you nothing as coils fail under load not when they are ‘static’, a coil’s resistance can check good and it can still be bad. Don’t overcomplicate this by assuming this sensor or that is the cause of the problem, stick to the basics as 90% of performance problems have simple explanations.
vacuum leaks
http://www.youtube.com/watch?v=9CPqbaSgcok+voltage leaks
http://www.youtube.com/watch?v=x-U9WqJfaJsi did the plugs but still have the misfire i checked for vac leaks but i cant find any . tomorrow i am going to borrow a fuel pressure gage to test that out and see if that is my problem . is there a way to check the coil that is reliable? the problem seems intermittent . worse when cold and also hard starting when cold but still there sometimes when warm . it will idle rough and stall out a couple times but than work fine tomorrow i will try to get video of a cold start and replicate the issues im having . thanks for all the help ! much appreciated
- You must be logged in to reply to this topic.