|07-18-2014 02:17 PM|
He told me that a simple static electricity charge will ruin them.
They have to wear a grounding strap from their wrist to the body when doing anything electrical to the ECM. And the sequence of hooking up the battery matters as well.
Always take the negative terminal off first, then the positive. And reverse when installing, positive on first, then negative. Keeps it from arcing. And take both terminals off of the battery.
Not my words, just his way of doing it at the dealership. I personally wouldn't think that they would be that sensitive, but who knows.
|07-16-2014 09:04 PM|
|daddyjeep||Well, haven't paid for the ECM yet so I can just give it back. Not getting any CEL codes so I doubt it's any of the sensors. Looks like I should just buy a new ECM so I know it's good.|
|07-16-2014 08:38 PM|
I talked with Steve about your 2 minute run time, and he said basically the same thing that WICruiser stated.
He did also say that it could be because of the lack of backpressure from the open exhaust is giving the O2 sensor fits.
And, or, (I know you don't want to read this one) the capacitors in the ECM are heating up and causing the shut down to happen. Hence the reason it takes 10 minutes to restart (time for the capacitors to cool down).
|07-10-2014 05:48 PM|
You need to determine if the inability to restart is due to spark or fuel. Spark is fairly easy - you have it or you don't. Fuel could go either way - to much fuel it will not fire and not enough fuel it won't fire. I would check spark first and if it has spark pull a spark plug to see if it is wet or dry.
All that will do is help ID the problem area but the actual problem may be harder. It could be that the computer is running the few minutes in open loop mode but as soon as it switches to closed loop the feedback loop is doing something that kills it.
Let us know what the base problem is (above) and we may be able to help point you in the right direction.
|07-09-2014 10:27 PM|
I have no idea how im going to fit my flowmaster under my Jeep with those long arms. I can put it way in the back where the gas tank used to be but I really dont like that idea.
So...the Jeep runs for a couple minutes and dies on me now. Once it dies it won't restart for about ten minutes. Any advice on where to start?
|07-09-2014 05:32 PM|
|daddyjeep||Thats what I do Joe. It's a cheap temporary solution. Once I get some headers and dual exhaust it will get done right.|
|07-09-2014 03:59 PM|
|0III0forlife||Oh, that looks like some backwoods engineering|
|07-07-2014 10:21 PM|
Started working on the exhaust tonight. Have to route it from the stock ZJ Y pipe up above the tranny cross member. Not quite a mandrel bend but it will do.
|07-03-2014 10:42 PM|
|Sawyerballer98||So psyched to see it alive again congrats go hit the trail|
|07-03-2014 07:10 PM|
|07-03-2014 09:22 AM|
|daddyjeep||No exhaust after the Y pipe. It should sound pretty good once I get my Flowmaster on there.|
|07-02-2014 11:12 PM|
|07-02-2014 10:57 PM|
|07-02-2014 08:52 PM|
|daddyjeep||Thanks. Thats a weld on skull from Ballistic Fabrication. It' on my shock tower brace.|
|07-02-2014 08:47 PM|
|crash007||I love the piece on your engine that shaped like a skull|
|07-02-2014 08:30 PM|
Got another ECU tonight and guess what?
YJ 5.2 conversion first start - YouTube
|06-30-2014 12:04 PM|
|daddyjeep||Been looking for an ECU. no luck yet. I can get one from ebay, but would like to find one I can borrow to see if that is the issue. I am thinking my issue may lie in the Throttle position Sensor. According to the test procedures in the manual it is no good. The output voltage ranges from 65 MV at closed throttle to 1.5 volts at WOT.|
|06-26-2014 09:50 PM|
If it's easy, see if you can find a spare ecu?
Check all grounds, and maybe add a couple more. Can't hurt.
|06-26-2014 09:49 PM|
|06-26-2014 06:17 PM|
|WICruiser||Sounds like the injectors are not firing. Your tech should be able to check to see if the injectors fire with a NOID light.|
|06-26-2014 03:29 PM|
|daddyjeep||Fuel pump is hooked to the ECU. It is getting good power while cranking and giving good pressure while cranking.|
|06-26-2014 12:36 PM|
|indirocz28||I might have missed it, but is the fuel pump hooked to the ecu, or do you have it hard wired to constant on with key on?|
|06-25-2014 08:34 PM|
|daddyjeep||Still not getting anywhere. I pulled the IAC...no change. I finally hooked up the CEL and got 12 and 55...so absolutely nothing. I have a Chrysler tech digging into this, thanks 0lll0 for life, and he is telling me it is not security. There was no SKIM in 95. Still need to verify a few voltages again, but not seeing the light at the end of the tunnel yet.|
|06-23-2014 11:56 PM|
|killswitch505||Just read the whole build pretty freaking cool hope you her her fired up soon|
|06-23-2014 10:50 PM|
I would dig into the security side and see what kind of scenarios others have had.
|06-23-2014 09:59 PM|
|daddyjeep||Well, still no joy. Swapped in a new distributor this weekend, no change. Checked fuel pressure. Fuel pressure is at about 54 pounds. That is a bit high with the WJ regulator, but should at least run. I am thinking it is a security problem, but I am not convinced. Every once in a while it will run little longer than the usual 1 second. I don't know... still digging.|
|06-19-2014 06:54 PM|
|daddyjeep||Thanks, hopefully I can make some headway this weekend.|
|06-19-2014 12:13 PM|
|Natex338||Great Build! Hope you figure out the engine issues..|
|06-19-2014 10:18 AM|
|Lil Red JK||Keeping my fingers and toes crossed for you!|
|06-19-2014 07:43 AM|
Check to see if there is some sort of immobilized security setting for the original setup.
Sounds like that's a plausible issue.
I've dealt with that on GM swaps in the past.
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