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I have a 02 alero with the 2.2 that will not start. Has fuel

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pressure. ( will not start...
I have a 02 alero with the 2.2 that will not start. Has fuel pressure. ( will not start with starting fluid) checked spark and was very weak. Replaced coil and module and still will not start.
Submitted: 2 years ago.Category: Oldsmobile
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10/25/2015
Oldsmobile Mechanic: Dan, Auto Mechanic replied 2 years ago
Dan
Dan, Auto Mechanic
Category: Oldsmobile
Satisfied Customers: 24,869
Experience: Independent Shop Experience, 2 Year Automotive Diploma, & Access to Information Database
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Hello, my name is***** to see what voltage is on pink wire going to ignition module while trying to start. Let me know, thanks.

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Customer reply replied 2 years ago
about 10.5
Oldsmobile Mechanic: Dan, Auto Mechanic replied 2 years ago

It should be closer to 11. What is battery voltage while trying to start?

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Customer reply replied 2 years ago
extended cranking battery voltage is 10.8
Oldsmobile Mechanic: Dan, Auto Mechanic replied 2 years ago

Try to jump start vehicle, let me know if that makes a difference. Thanks.

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Customer reply replied 2 years ago
no change
Oldsmobile Mechanic: Dan, Auto Mechanic replied 2 years ago
Monitor ground on black wire going to ignition module while trying to start. Meter should still maintain same voltage reading when using black wire as ground, if not run new ground. If good then next step is compression test. Timing chain problems on these vehicles can cause weak spark also. Let me know how it goes or if you have more questions, thanks.
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Customer reply replied 2 years ago
compression is about 180 across all 4 cylinders
Oldsmobile Mechanic: Dan, Auto Mechanic replied 2 years ago

Did you check ground? Also clean ground strap mounting points on coil housing. Let me know, thanks.

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Customer reply replied 2 years ago
ground was constant.
Oldsmobile Mechanic: Dan, Auto Mechanic replied 2 years ago

Disconnect the ignition module and check for 500-900 ohms resistance between the Purple and Yellow wires. Check for 500 millivolts (mV) AC output or more at a fast cranking speed. Let me know, thanks.

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Customer reply replied 2 years ago
which wire for ac output test?
Oldsmobile Mechanic: Dan, Auto Mechanic replied 2 years ago

They both put out voltage so you need to put one lead on purple wire and other lead on yellow wire to monitor ac voltage while cranking.

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Customer reply replied 2 years ago
colors on connector are Pink, White, Brown/white stripe, orange and black
Oldsmobile Mechanic: Dan, Auto Mechanic replied 2 years ago

The purple and yellow wires connect to pins 27 and 28 of PCM, sorry about confusion. Let me know, thanks.

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Customer reply replied 2 years ago
Where is the pcm?
Oldsmobile Mechanic: Dan, Auto Mechanic replied 2 years ago

Below the left side of the I/P near the steering column, here is a pic.

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Oldsmobile Mechanic: Dan, Auto Mechanic replied 2 years ago

https://www.dropbox.com/s/qc30h35kdiw6955/PCM.pdf?dl=0

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Customer reply replied 2 years ago
With the harness connected I have no way of testing wires. any other way to test it?
Oldsmobile Mechanic: Dan, Auto Mechanic replied 2 years ago

You can do test with it unplugged.

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Customer reply replied 2 years ago
What is the numbering on the pins? So I can get the correct 2
Oldsmobile Mechanic: Dan, Auto Mechanic replied 2 years ago

https://www.dropbox.com/s/riem7da2x37j0pq/2c.pdf?dl=0 There is diagram, let me know. Thanks.

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Customer reply replied 2 years ago
doesn't say which is 27 and 28
Oldsmobile Mechanic: Dan, Auto Mechanic replied 2 years ago

It shows pin 17, so you need to count over 10 pins from 17. Let me know if you get it, thanks.

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Customer reply replied 2 years ago
About 650 ohms and 0.00 and flicker to 0.01 ma cranking and not steady
Oldsmobile Mechanic: Dan, Auto Mechanic replied 2 years ago

Replace crank sensor, the cranking ac voltage is way too low. Let me know how it goes, thanks.

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Customer reply replied 2 years ago
It says theft lock on the radio. Can the battery be disconnected and the radio still work after?
Oldsmobile Mechanic: Dan, Auto Mechanic replied 2 years ago

Yes, it will be fine. Let me know how it goes, thanks.

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Customer reply replied 2 years ago
New cps in and still no start
Oldsmobile Mechanic: Dan, Auto Mechanic replied 2 years ago

I'm going to open question up to see if someone else has some idea. I'd consider double checking grounds or running new ground to ignition module. Someone will reply when they can help, thanks.

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Customer reply replied 2 years ago
nevermind got it running.
Oldsmobile Mechanic: GM Tech Cam, Oldsmobile Certified Technician replied 2 years ago
GM Tech Cam
GM Tech Cam, Oldsmobile Certified Technician
Category: Oldsmobile
Satisfied Customers: 29,595
Experience: 14 years Automotive experience all with Gm.
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Do you still require assistance?

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Customer reply replied 2 years ago
No. Security system was tripped.
Oldsmobile Mechanic: GM Tech Cam, Oldsmobile Certified Technician replied 2 years ago

Do you want to consider bypassing it so it does not do that again?

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Customer reply replied 2 years ago
Person told me a key was just made and then it didn't start.
Oldsmobile Mechanic: GM Tech Cam, Oldsmobile Certified Technician replied 2 years ago

The key does not have a chip in it, that’s the issue. The security system uses a sensor in the ignition cylinder to sense the rotation of the key along with the change in power feeds in the ignition switch so the key is only a key.

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Customer reply replied 2 years ago
They brought original key and it started right up. After 2 days of trying things the key did it.
Oldsmobile Mechanic: GM Tech Cam, Oldsmobile Certified Technician replied 2 years ago

I am not sure how that can be. As I said it’s the pass lock system. Often its just a bad connection to the pass lock sensor in the ignition cylinder.

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Customer reply replied 2 years ago
Either way will wait and see if it does it again. Thanks for trying.
Oldsmobile Mechanic: GM Tech Cam, Oldsmobile Certified Technician replied 2 years ago

If you want to bypass that sensor, just reply and let me know what you want to and I can assist you with that.

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Customer reply replied 2 years ago
ok. I know this thread will be in my question file.
Oldsmobile Mechanic: GM Tech Cam, Oldsmobile Certified Technician replied 2 years ago

Absolutely. Have a great day. No need to reply in the mean time.

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GM Tech Cam
GM Tech Cam
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