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Discussion Starter #1 (Edited)
Title says it all. Daughter's 2003 CRV 160K has a CEL. Throwing P0300, P0301 - I'm grumpy codes. She scanned it yesterday, and there is a new code P0122. I've not verified this, but in the interest of full disclosure... so this morning, I swap cars, crank the CRV, pull it up to the garage. It certainly sounds rough, but it went up the driveway just fine.

Pulled the plugs - look fine, maybe a little oil on #2. All of the coil packs have been replaced, but I swap #1 and #3 just to see if the misfire will move. They may be new, but it's an easy test. I also spray some electrical contact cleaner into each of the coil connectors. While the plugs are out, I decide to do a dry compression test. Disconnect fuel injectors, test each cylinder. The compression is not happy - 180, 150, 120 90, but it is what it is. So, with that, I re-install the plugs, install the coil packs, reconnect the fuel injectors.

Dang thing cranks but refuses to start.:confused2:

Rechecked the fuel rails, coil pack connections, etc. Still no joy. What am I missing? What could I have broken?

:cussing:
 

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When was the last time the valves were adjusted? Might be some burned ones (since the code didn't move with the ignition components).

LOL, "I'm Grumpy" codes...
 

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Discussion Starter #3
I had a Maxima where I learned all about coil packs. :)

No idea on the valves, that's soon to happen. I doubt that would explain why the car would just stop running.

Question - may be a new topic. In years gone past, cars had distributors and ignition wires. It was relatively trivial to determine if a cylinder had ignition - just loop a timing light induction pick up over each wire, and you could immediately tell if it was firing. How do you test if a plug is firing when using a coil pack? Just pull the plug/coil pack out and crank it?
 

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Another issue might be an intermittent/bad cam or crank sensor. If the ECU doesn't sense movement, it won't fire the plugs.

But in my experience you wouldn't get a misfire code from that. You would get the code associated with the sensor.

Were the coils you used OEM? On Fits, aftermarket (cheap) coils don't last long. Just sayin'.


+++++++

BTW the P0122 is a throttle position sensor code...common on the first couple years of Gen2.
 

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Discussion Starter #5
The coil packs are oem densos. They've been in the car for a while. I'm just trying to figure out what it won't start any more. I'll worry about the CEL and 300/301 codes later. Going back out to scan for connectors knocked off or something....
 

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Discussion Starter #6
not my day...

down to the parts store I go to get an ignition tester - plug it in to the coil pack and ground it.

ig-test.jpg

Today is not my day, tester is fatter than a standard spark plug so doesn't fit. The good news is that I pulled a plug and I definitely have fuel.

:Surrender:

I have other things to do...
 

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Discussion Starter #7
It lives!

Daughter and boyfriend came over with the new TPS, pulled the throttle body, replaced sensor and gave the throttle body a thorough cleaning. Re-assembled and car started immediately with no trouble codes. Bad timing on my part.

Just wanted to close the thread out.
 

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So, to clarify, you had a NO START from a dirty throttle body/TPS?

Glad you got it fixed!
 
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