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Author Topic: Battery shorted out on a wrench, now car won't start.  (Read 17799 times)

Offline Brett Haviland

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Re: Battery shorted out on a wrench, now car won't start.
« Reply #60 on: March 20, 2011, 11:57:45 am »
7 bolt?

maybe your crank walked out of the block and punched the crank sensor in the face.
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Offline Mikael Mikkelsen

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Re: Battery shorted out on a wrench, now car won't start.
« Reply #61 on: March 20, 2011, 11:58:20 am »
Hardy har har..... That would have had to be a hell of an arc to move the crank that far. Like Jesus' Vengance Lightning kinda arc



Is it possible that its my MPI relay?

I tried testing it, but the directions are a little skewered, i got caught up on this:

"If MPI relay test okay in following steps, substitute PCM with known good unit and retest. Measure resistance between relay terminals #5 and #7. Resistance should be approximately 90 ohms. Check continuity between terminals #6 and #8. Continuity should exist in only one direction. Replace MPI relay if continuity is not as specified."

So I tested it with everything still plugged in.  Continuity exists in only one direction, which is good. But I have to put it on 2k Ohms to get a reading of 1.44.

I dont even know if I tested right, but with the relay in there or removed I get the same reading, so I assume its not the relay itself....
« Last Edit: March 20, 2011, 11:59:54 am by Mikael Mikkelsen »
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Offline Chad Giffen

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Re: Battery shorted out on a wrench, now car won't start.
« Reply #62 on: March 20, 2011, 01:21:55 pm »
Holy crap all this is taking way too long.

lol.

Ok. How about we all only focus n spark issue, since that is the main problem:

Lets start from the parts furthest away from the spark and work inwards......     lets also remember this was caused by shorting the battery, so compression and fuel should be fine.

1) ECU is ruled out. We know that's not it.
2) MPI Relay (Listen for the click when the ignition is turned off/on)
3) CAM sensor (this sends signal to the power transistor)

       lets do a bit more of a diagnosis on this. Let's try this......

       - Remove the CAM sensor, but leave it plugged in.
       - Remove the spark plugs and wires, but leave the assembled and have them all resting on he exhaust manifold so they are grounded and will visually spark if possible.
       - turn the ignition on, but don't crank the car
       - now go turn the crank angle sensor by hand. If the coil pack and power transistor are working, you will hear them discharge loudly as you turn the CAM sensor. Look for spark.

     If you don't hear the discharge noise, replace the coil pack and power transistor. If you do hear them and there is no spark, replace the CAS

Do this and get back to us.


« Last Edit: March 20, 2011, 01:24:00 pm by Chad Giffen »
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Offline Mikael Mikkelsen

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Re: Battery shorted out on a wrench, now car won't start.
« Reply #63 on: March 20, 2011, 01:58:57 pm »
The MPI relay isn't making any sounds at all, I cant hear it do anything.
But I then pulled them off and tested them on the bench and they are clicking just fine. So its not getting something from the wires leading to the MPI relays I guess...???

Ive pulled the CAS off, including the 14mm bolt. Pulled off the spark plugs / wires and did as said.

Turned the ignition on

Getting no responce from anything at all. No clicking from anything, no sparks, nothing

The only relay the clicks when the car is turned on is the one right under the drivers side on the left bottom

Does that mean that I have to replace completely everything?

d
I just don't see how the MPI relay can be at fault when Im getting the same readings wether its plugged in or not...
« Last Edit: March 20, 2011, 04:20:25 pm by Mikael Mikkelsen »
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Offline Chad Giffen

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Re: Battery shorted out on a wrench, now car won't start.
« Reply #64 on: March 20, 2011, 02:43:03 pm »
Well did you swap the CAS yet? Orborrow a kn good oe?
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Offline Mikael Mikkelsen

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Re: Battery shorted out on a wrench, now car won't start.
« Reply #65 on: March 20, 2011, 04:16:41 pm »
I live in Kelowna so its not exactly easy to just grab parts, almost everything has to be shipped.

I ripped out the power transistor and it def looks bad, it has a bunch of oxidization on some of the prongs. Would that stop the car from running if it was toast?

Im on the prowl now for some parts
« Last Edit: March 20, 2011, 04:22:16 pm by Mikael Mikkelsen »
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Offline Chad Giffen

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Re: Battery shorted out on a wrench, now car won't start.
« Reply #66 on: March 20, 2011, 04:21:35 pm »
If its toast, your car would not get spark.

Its pretty hard to stop all that current with oxidation unless the oxidation is really bad. Like coating the whole prong basically. I doubt thats it as you would have had intermittent problems before this occurance.
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Offline Jordan Kruger

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Re: Battery shorted out on a wrench, now car won't start.
« Reply #67 on: March 20, 2011, 04:31:28 pm »
if you have a voltmeter, Im sure you can find out if the transistor or any sensor is good. Ive tested almost every sensor ive ever thrown away. confirming they were bad.    Search the net to find different methods of testing. I havent looked into testing the transistor, just applying low voltage will tell you if its making a connection or not.   But make sure you know how to test it, then try it.  ssssalll  ide do. lol 8)
« Last Edit: March 20, 2011, 04:36:29 pm by Jordan Kruger »
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Offline Mikael Mikkelsen

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Re: Battery shorted out on a wrench, now car won't start.
« Reply #68 on: March 20, 2011, 05:05:04 pm »
I'll post a picture in a second. I opened up the transistor as it had corrosion, it killed the transistor but I was going to get a new one anyways.

There is a short in between #5+#6 on the inside, not noticeable at all.


With all of the transistor Ohm tests Ive done, they have all come out just fine. But this unit is for sure messed up. And im willing to bet that this is why my car is not working.
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Offline John Hartman

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Re: Battery shorted out on a wrench, now car won't start.
« Reply #69 on: March 20, 2011, 05:13:45 pm »
corrosion on the connectors can and will cause issues.  And thats what I was saying about the ohm meter testing its not always a good indicator.  I have working know good parts that failed those tests, and have also returned known not working brand new parts that pass the test.  Used ones that pass the test have failed to actually run the car too.
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Offline Mikael Mikkelsen

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Re: Battery shorted out on a wrench, now car won't start.
« Reply #70 on: March 20, 2011, 06:02:22 pm »


John and everyone else. THANK YOU! I really hope this is it, and Im sure it is. I owe all u guys a beer!
« Last Edit: March 20, 2011, 06:29:30 pm by Mikael Mikkelsen »
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Offline Jordan Kruger

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Re: Battery shorted out on a wrench, now car won't start.
« Reply #71 on: March 20, 2011, 06:24:47 pm »
lol   tada!
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Offline Constantin Morosan

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Re: Battery shorted out on a wrench, now car won't start.
« Reply #72 on: March 20, 2011, 06:51:19 pm »
holy shit son ....  how long did u shorted it out for ? LOL that thing EXPLODED !!  :D
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Offline Brett Haviland

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Re: Battery shorted out on a wrench, now car won't start.
« Reply #73 on: March 20, 2011, 08:05:41 pm »
it looks like you ripped the transitors off the connections.
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Offline Mikael Mikkelsen

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Re: Battery shorted out on a wrench, now car won't start.
« Reply #74 on: March 20, 2011, 08:35:39 pm »
yeah I did to look inside, figured I was replacing it anyways and wanted to know for sure if there was internal damage. The outside had a bunch of oxidation so I wasnt putting htat back on the car anyways.

When I pulled it apart you can see the green crap which was the short
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