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Old 04-01-2012, 08:43 AM   #1
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95 4cyl 2.5 new owner 5 speed manual

Hi Im a new jeep owner.. (3 weeks) How do you determine if its a "yj, cj, or other model" Have a few questions. any input would be appreciated

Got code 27 # 1 injector, replaced injector still getting code. I'm a novis mechanic and would like to try and fix myself. how do you check wiring and computer?

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Old 04-01-2012, 08:49 AM   #2
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95 is the last year of the YJ, so you have a YJ. comp/injector issue I'll kick off to the pros on here

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Old 04-01-2012, 09:03 AM   #3
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Thanks for the info I'm new on here so how would some one kick off to pro's? still tring to see how this forum thing works Thanks.
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Old 04-01-2012, 09:55 AM   #4
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when he says kick off to the pros, he means he will leave those answers to others on here who know more about the subject (sorry i'm not one of them). 86 back to some time in the 50s (I think) is a CJ, 87-95 is a YJ, 97-06 was a TJ, except for the unlimited 04-06 which was the LJ, then 07 to present is the JK
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Old 04-01-2012, 10:04 AM   #5
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I feel stupid Thanks Back Bear!
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Old 04-01-2012, 10:06 AM   #6
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np, we all start somewhere and there is always something to be earned. also meant to add that they didnt build a wrangler in 96, thats why I didnt list it
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Old 04-01-2012, 10:31 AM   #7
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Us YJ owners seem to have a little extra "pep" in our Jeep wave, too.
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Old 04-01-2012, 10:43 AM   #8
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Check the stickies in the top of the YJ section. You can learn a lot from them about your Jeep and others.
Heres is a good example........................click below

http://www.wranglerforum.com/f8/the-yj-guide-68748.html
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Old 04-01-2012, 10:51 AM   #9
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np, we all start somewhere and there is always something to be earned. also meant to add that they didnt build a wrangler in 96, thats why I didnt list it
lol, just noticed, sorry meant learned, not earned. I have a 19mo old, so my laptop is missing soe keys and always need to double check my spelling
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Old 04-01-2012, 09:07 PM   #10
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Quote:
Originally Posted by rthirteen View Post
Hi Im a new jeep owner.. (3 weeks) How do you determine if its a "yj, cj, or other model" Have a few questions. any input would be appreciated

Got code 27 # 1 injector, replaced injector still getting code. I'm a novis mechanic and would like to try and fix myself. how do you check wiring and computer?
If the engine is running OK now, reset the computer by disconnecting the battery for a minute or so. Give the computer a chance to recognize the new injector....
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Old 04-01-2012, 09:44 PM   #11
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Thanks,I was able to reset comuter code not showing but jeep is running ruff
got code 27 injector 1 control circuit fires improperly.. changed injector 1 and it is still mis-firing. reset computer and now code is not showing, but it's still mis-firing. changed all the sparkplugs. how can i check to see if it's wiring or the computer itself. Any other ideas of what i can check?? 4cylinder 2.5 liter 5 speed manual
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Old 04-07-2012, 08:58 AM   #12
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Hey guys I took my jeep to a mechanic and it ended up being a bad lifter!!only cost $100.00. now she purs like a kitten,Just have to find out why after heats up i get low oil pressure,i replaced the oil pressure senser and still no luck
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Old 04-07-2012, 09:59 AM   #13
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Where is your oil pressure at? Have you cleaned the contacts on the back of the gauge itself?

Typically the oil pressure will be high when the engine is cold, and lower when it has warmed up.
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Old 04-07-2012, 12:22 PM   #14
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Where is your oil pressure at? Have you cleaned the contacts on the back of the gauge itself?

Typically the oil pressure will be high when the engine is cold, and lower when it has warmed up.
When its cold engine oil pressure is @ 40 but start to go down when heats up to about less then 10 but as soon as i press on the accelator it goes up a little,when i come to a stop light sometime stalls.
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Old 04-08-2012, 12:41 PM   #15
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Did you get to see the old lifter? I just replaced a 4.0L because the cam wore out, and ground the bottom of the lifter down. Also caused low oil pressure.
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Old 04-08-2012, 08:52 PM   #16
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40 seems a bit low for cold start but the YJ gauge is not known to be the best gauge.

What oil are you running? Whats your mileage?

Congrats on the jp BTW!
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Old 04-08-2012, 09:54 PM   #17
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40 seems a bit low for cold start but the YJ gauge is not known to be the best gauge.

What oil are you running? Whats your mileage?

Congrats on the jp BTW!
Thanks,I'm running 10-30 mobil super the jp has 129000
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Old 04-08-2012, 09:58 PM   #18
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Did you get to see the old lifter? I just replaced a 4.0L because the cam wore out, and ground the bottom of the lifter down. Also caused low oil pressure.
what do you mean replaced a 4.0?do you mean replaced the whole engine? did not look at the old lifter the mech. is a good friend i'll have to check on that.
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Old 04-08-2012, 11:39 PM   #19
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Thanks,I'm running 10-30 mobil super the jp has 129000
maybe run 15w40
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Old 04-11-2012, 09:50 PM   #20
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maybe run 15w40
Thanks 95YamJam, I tried 20w50 no go still low oil pressure.I was talking with my mech. and we are going to drop oil pan replace filter and oil pump while we're there see if that helps if not ,he said maybe loosing pressure at a berring I let you know the outcome
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Old 04-12-2012, 12:17 AM   #21
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Yes, had to repl whole motor, you said lifter was $100. Not sure on the 2.5L, but on the 4.0L the head has to be removed to repl a lifter, we repl the motor, because the cam lobe had ground down, damaged the lifter and all that metal debri was floating around the motor. I am not trying to mess with your head , just chiming in on my experiences.
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Old 04-12-2012, 01:12 AM   #22
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If you truly had a worn lifter, what caused it? You'll see the oil pressure gauge move with engine rpm and lower as the oil warms up, but you should not see 10 psi. If your adding thicker and thicker oil, at best your just masking the problem. In my decades as a technician I have never seen any thing in a can FIX a problem. If you have a lifter that is worn enough to cause a misfire than I would bet my first born that the reason you have oil pressure issues is worn engine components. I have had luck in the past just replacing the rod and main bearings in my 2.5. If you are taking off the oil pan anyway pick up a set and put them in. If you can get the pan off you can replace the bearings, just remember you will need a torque wrench to complete this task and the bolts are torque to yield. If you have any questions post them, I'll keep an eye on this thread, or pm me.
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Old 04-16-2012, 07:48 AM   #23
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If you truly had a worn lifter, what caused it? You'll see the oil pressure gauge move with engine rpm and lower as the oil warms up, but you should not see 10 psi. If your adding thicker and thicker oil, at best your just masking the problem. In my decades as a technician I have never seen any thing in a can FIX a problem. If you have a lifter that is worn enough to cause a misfire than I would bet my first born that the reason you have oil pressure issues is worn engine components. I have had luck in the past just replacing the rod and main bearings in my 2.5. If you are taking off the oil pan anyway pick up a set and put them in. If you can get the pan off you can replace the bearings, just remember you will need a torque wrench to complete this task and the bolts are torque to yield. If you have any questions post them, I'll keep an eye on this thread, or pm me.
Jeep is getting worked on today I'll let you know how everything goes Thanks again

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