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Discussion Starter #1
I just installed a new timing belt and water pump on my 2001 toyota camry. The old belt broke. I tested it with the alternator, serpentine belt, and upper timing belt cover off. ( to make sure the belt had proper tension. It ran smoothly, but the positive wire for the alternator shorted to the exaust manifold. I shut it down and I had to replace the 100 amp alternator fuse. I put it all back together and now it runs really rough. And is hard to start. It does not idle steady. When idling it slows way down and stalls. I rechecked the timing and it is spot on. I did a compression test and it had pressures of 215 psi #1, 210 psi #2, 210 psi #3, and 210 psi #4. I am not getting g any codes, but I have not driven it since changing the timing belt. Any Ideas? I have been checking ground wires and am about to test the crank and cam sensors....
 

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Mine ran like crap with the wrong alternator in it, until it quit and I got the right one.
That short you described may have took out one of the ECU fuses. Now it's in limp mode?
Check fuses( low hanging fruit) 123_1.jpg
 

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Discussion Starter #4
I tested both the battery, and the alternator. I have also checked all the fuses both in the cabin and under the hood. I also cleaned up all my ground connections. I have ordered a new camshaft position sensor. I am going to try that next.
 

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2010 Camry SE V6
2008 Camry LE
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Hope you did oil pump seals while back there, otherwise you’ll be doing the whole job over again


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Discussion Starter #7
No I did not do the oil pump seal. I was just trying to get the car to work. If it works well It will be worth diving back into it in a year or so...
 

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Discussion Starter #10
I found the cause. It looks like one of the crank sensor wires was contacting the ground shield surrounding it. I repaired the short and it runs again.
 
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