Help us help you. By posting the year, make, model and engine near the beginning of your help request, followed by the symptoms (no start, high idle, misfire etc.) Along with any prevalent Diagnostic Trouble Codes, aka DTCs, other forum members will be able to help you get to a solution more quickly and easily!

[FIXED] 2008 Honda Accord 2.4l

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3 years 9 months ago - 3 years 9 months ago #41525 by Da Beginner
Good day everyone. I’m working on a 08 accord 2.4 like mentioned above. Car has fuel, spark, lowest cylinder is number 2 with 90psi. Check the timing fuses and grounds. The car won’t start. We made sure the injectors were doing there thing. Any help would be grateful, looking for a cam and crank waveform would be excellent


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Last edit: 3 years 9 months ago by Tyler.

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3 years 9 months ago #41526 by Noah
Replied by Noah on topic 2008 Honda Accord 2.4l
Minimum compression is 135 on that engine. What the the rest of the cylinders?

"Ground cannot be checked with a 10mm socket"

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3 years 9 months ago #41527 by Da Beginner
All the others are around 127psi, in which the car should still run only cylinder 2 would be weak


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3 years 9 months ago #41532 by Tyler
Replied by Tyler on topic Re:2008 Honda Accord 2.4l
The compression is definitely a problem. How did you check timing, specifically?

Has anyone checked fuel quality? Gas stations still get tanks of junk fuel occasionally.

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3 years 9 months ago #41538 by dfends@hotmail.com
How did you check for fuel ?


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3 years 9 months ago #41539 by Da Beginner
We took the fuel line off and we got fresh gas still no start. Next step is to do a cam and crank wave form. Thanks for responding


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3 years 9 months ago #41540 by dfends@hotmail.com
Check for injector pulse


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3 years 9 months ago #41541 by dfends@hotmail.com
If you are getting spark then you have a crank signal


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3 years 9 months ago #41542 by Da Beginner
We have injector Pulse and made sure they weren’t clogged (blocked up) as well. I’m thinking the cam and crank and not matching because it sound like backfire sometimes come from intake. We check the timing already.


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3 years 9 months ago #41543 by dfends@hotmail.com
Did you try to start it with an alternative fuel source ?


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3 years 9 months ago #41552 by Da Beginner
Yes we did. We tried starting fluid. This one really has me thinking so I’m open to any help I can get and thanks to everyone who has responded already. I finally was able to take a cam and crank waveform from it but I can’t get it to upload


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3 years 9 months ago #41563 by Tyler
Replied by Tyler on topic Re:2008 Honda Accord 2.4l
Are you trying to upload screenshots? What scope did you use?

Known good:

Attachments:

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3 years 9 months ago #41572 by Da Beginner
We’re using a pico scope and yes it’s a screenshot.


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3 years 9 months ago #41579 by Tyler
Replied by Tyler on topic Re:2008 Honda Accord 2.4l
Send the .PSD to me. :cheer:

wrenchturnsyou@gmail.com

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3 years 9 months ago #41597 by Da Beginner
Thank for reaching out to me. I just sent to your email. Also if you can, please upload it for me. Again thanks a million please confirm that you received it by Google Drive.


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3 years 9 months ago - 3 years 9 months ago #41598 by Tyler
Replied by Tyler on topic Re:2008 Honda Accord 2.4l
I haven't seen anything yet? I'll keep checking this morning.

EDIT: Never mind, got it!



I'll have to find another known good. :huh: The CKP reluctor wheels are completely different.
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Last edit: 3 years 9 months ago by Tyler.
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3 years 9 months ago #41602 by Tyler
Replied by Tyler on topic Re:2008 Honda Accord 2.4l
Has this engine been apart recently? Used engine? Chains replaced?

From what I can tell, two things happened around '08. One, the CKP reluctor changed, from 12+1 in the known good I posted, to yours with too many teeth for me to count right now. :silly: Two, the exhaust CMP reluctor changed, from the 4+1 in mine, to one that looks like the trace in blue:



I can't find any waveforms that have your particular combination of CKP and CMP. :angry: In every example I've found, if the vehicle has the new CKP waveform, it also has the new exhaust CMP waveform.

Am I missing something here? :huh:
Attachments:

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3 years 9 months ago #41607 by robert.lesaca
...do you have any timing waveform? when cranking the engine does it sound like it cranks kinda faster than usual?

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3 years 9 months ago #41612 by Hardtopdr2
Ckp and cmp sensors fail.... some fail by over reporting rpm i just had one from a caddy reporting 8400 rpm on the camshaft and crank sensors reporting extra tooth marks from crank. It could be in this case the sensor trips out more signals than it should. Just do the math to figure out rpm

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3 years 9 months ago #41622 by Da Beginner
Tyler to answer your question yes the engine taken apart to change the head gasket. It came from another shop also can you email me the known good cam and crank wave form you have please. michael.francis3261@gmail.com

I got a waveform from a 2010 with the engine and the Patton ain’t the same I will send you that too, please send me the one you have as well thanks


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