good mechanic in fresno area

[h-townxj]

hey guys my jeep has been acting up alot and well after 6 months of fighting with fixing it and asking for help on the forums i have given up and am ready to leave it to a professional. it has been electrical issues go figure. dose any one know of anyone they can trust here in the fresno area that knows the chrysler electronics very well?

 

[blondejoncherokee]

what are the symptoms? have a multimeter?

 

[h-townxj]

Alright get ready for the list it's a bit of a long one.

It's a 2000 wrangler (I know I know) 4.0 avenger supercharged 8.5lb boost and an AEM fic piggy back also has a own electronic vehicle security system tied into the asd relay. The jeep has always since the 2nd month I've owned it had a weird surge/studder at part heavy throttle even before the s/c replaced tps with napa one no change. Installed supercharger at about 80k Had a cam and crank sensor failure shortly after 100k miles. Replaced both and had no problems with it until about feb this year. Day before I was taking in the jeeo for a dyno tune it acted like it had a bad map sensor got a cel for it cleared and replaced the sensor. No change at all so I reset my ECM and it was happy. Next day take it to the tuner under any boost had spark blowout and misfires at idle. Dropped it off thinkIng maybe it's in the tune. Get a call about an hour later saying he had no luck and it would just randomly die on him for no reason at all and the oil pressure gauge was pegged. I checked all the wires no cuts or anything in them. Placed all new ground wires throughout the jeep misfire and spark blowout where no more but jeep continues to die for no reason. So I once again replaced my cam and crank sensors for the hell of it. My O2 sensors are unplugged and turned off in the programming. Oil pressure still pegged no change. I tried a few other things with no luck and gave up for a few months. Two days ago I got an exchange on my diehard platinum and threw her in fired the jeep up. She ran great exept for the random stall still it just acts like somebody Pulled the asd relay. I pulled out the batter to have better acess to my wires for the piggy back nothing cut in the wires. Went to throw the batter back in and my ratchet slipped while on the positive and landed directly onthe ECM case (costly mistake) sparked it wasn't pretty. Started the jeep up to see what would happen now it sounds like its running on 5 cylinders and there are no cel and alsmost sounds like an exhaust leak at the head. ( I have not visually checked of felt at this point for one) looked at my live data on the scanner and nothing looks unusual to me at least. Thigh at full throttle key on engine off my tos only has 75%. I am at all loss I do not have a multimeter personally but have some friends that do. Any advice is more than welcome. Sorry for the long story. UT I felt a full background it needed. I would swap ECM with my xj but it is Cali emissions where the tj Is federal.

 

[h-townxj]

I will post up videos tonight of the weir stall. And how she runs now. I'm currently at work so can't at the moment

 

[h-townxj]

Video of the stall. This is shortly after replacing all the sensors I mentioned.

http://www.youtube.com/watch?v=eBAPLbSrh6Q&feature=youtube_gdata_player

 

[blondejoncherokee]

have you considered bypassing the alarm for the short run to make sure its not doing something screwy.

the sudden dying makes me think crankshaft sensor is bad, or wiring to it. i would check for continuity across all the sensor circuits to make sure you have good grounds, as well as voltage across the TPS from closed to WOT just for shits and giggles.

something seems goofy with the asd relay wiring situation for the random dying. have you replaced the relay and taken out all wiring from it temporarily that is not stock?

is the diverter valve good on the charger? vacuum leaks can cause weird stuff with a super charger.

hows fuel pressure?

so the ASD gives power to injectors, computer and fuel pump right?

sounds like something odd is up with your security system and its triggering that relay off.

my gut feeling is replace ASD relay and pull out the security system for now , and see what that does?

also check power and ground to the PCM

personally i would put a multimeter on everything and check for resistance.

this was interesting:

http://forums.cnet.com/7723-7811_102-248386/jeep-grand-cherokee-stalling-fixed/

how is the idle air control valve?

that could cause the thing wanting to sputter and die

 

[h-townxj]

I swapped my iac between the two jeeps as well no change there. I'm gonna have to figure out how the security is wired last thing I wanna so it pull it wrong and she's not doing anything at all. I don't know if u watched the video but there is no sputtering just like a key off. So to me also seems related to the asd. I checked my whole crank circuit as well as everything else running off the asd and found nothing. I'll go pick up a multimeter tonight and see what I find in that respect. This morning the diverted valve came to mind as well I have check it before but will again when I get home. Fuel pressure has appeared to be fine no actual measurement but It has never been an issue even at wot. I'll take a video tonight of its current running condition as well maybe it will spring some ideas.

 

[blondejoncherokee]

HF usaully has multimeters for 2.99$. I use a cheap Autozone one , it was like 20$.

 

[Boatwrench]

I vote for cam sensor. My 2000XJ ran bad and even when it wouldn't set a code just replacing the cam sensor made it all better. The Napa replacement lasted 13K miles. I knew better, always use OEM sensors and engine management switches.

read this and search for P0340 codes.

 

[h-townxj]

ok so some update it rand on 3 cylinders because some retard owner left 3 injectors unplugged what an idiot.

and to clarify other wise the jeep runs perfect! just dies at random. all of the sensors but the O2, TPS and OPS are brand new like less than 1000 miles brand new. on my piggyback i set my O2 sensor modification map to stock and it so far has ran fine well see after a few days how she dose.

 

[blondejoncherokee]

crankshaft sensor, camshaft sensor, or somethign wierd with the CPU, or maybe the asd relay wiring due to the alarm system.