missing cam pulse

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kenlink
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Mon May 06, 2019 5:53 pm

I have a Generac 22KW Model# QT02224 ANAX ….. Cranks for about 8-10 seconds... On screen says "MISSING CAM PULSE" … Any help.. Thanks, Ken
Chris
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Mon May 06, 2019 5:58 pm

Hey Ken,

It's usually the front mag pickup that causes issues. It's screwed into the upper timing cover. It's a magnet, so it, or the magnetic pin on the cam wheel can have metal debris stick and cause signal issues.

You can remove the coil pack bracket and upper plastic timing cover and see it with a flashlight.

Rotate the engine by hand to line up the cam pin with the pickup and verify that there is .015 air gap between the two.

Mag pickup can be seen here https://shop.gentekpower.com/products/g ... uid-cooled

Resistance can be measured at between 900-1100 ohms or so with most of them being around 990 ohms.

Hope this helps!
Generac tech for over 12 years. I'm here to help!
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kenlink
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Mon May 06, 2019 6:14 pm

Thank you, I will give it shot... Thanks
kenlink
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Tue May 07, 2019 2:48 pm

Hi Chris, Looks like I need to take the outside cabinet off to get to these parts is that correct.. Thanks for help again.. Looks like bolts on the bottom attached to frame...
Chris
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Tue May 07, 2019 9:18 pm

No, no. This is all at the top of the engine at the front. No need for any major disassembly!
Generac tech for over 12 years. I'm here to help!
"The only source of knowledge is experience" -Albert Einstein
Looking for Generac parts? Gentek Power offers the full line of Generac replacement parts! Shop Gentek Power Generac Parts
A list of my favorite Generator & Electrical Tools! https://www.amazon.com/shop/gentek_power
kenlink
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Fri May 10, 2019 10:32 pm

Hi Chris, Thank you for pointing me in the right direction... I replaced the mag pickup part# OD2244M and gapped it At .015 and it started right up!!!! Also I did need to remove cabinet (12 bolts) everything else was as you said.... Thanks again, Ken
Chris
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Sat May 11, 2019 12:02 am

Glad to hear you got it fired back up!
Generac tech for over 12 years. I'm here to help!
"The only source of knowledge is experience" -Albert Einstein
Looking for Generac parts? Gentek Power offers the full line of Generac replacement parts! Shop Gentek Power Generac Parts
A list of my favorite Generator & Electrical Tools! https://www.amazon.com/shop/gentek_power
spaknives
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Thu Sep 26, 2019 12:22 pm

Hello, I have almost the same generator throwing the same alarm. I did what you said and pulled the upper timing cover. Here is a picture of what I see. Is this fear suppose to have a belt on it?
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Chris
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Thu Sep 26, 2019 12:43 pm

spaknives wrote:
Thu Sep 26, 2019 12:22 pm
Hello, I have almost the same generator throwing the same alarm. I did what you said and pulled the upper timing cover. Here is a picture of what I see. Is this fear suppose to have a belt on it?
Yes, that's the camshaft pulley. That engine may be done... :sad:

The valves have probably crashed into the pistons bending the valves and denting the pistons. Best case scenario would be a head rebuild at a local engine shop with new valves, worst case is engine swap... Depending on the cost of the engine (I can price for you) it might be cheaper to swap than to repair the head.
Generac tech for over 12 years. I'm here to help!
"The only source of knowledge is experience" -Albert Einstein
Looking for Generac parts? Gentek Power offers the full line of Generac replacement parts! Shop Gentek Power Generac Parts
A list of my favorite Generator & Electrical Tools! https://www.amazon.com/shop/gentek_power
spaknives
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Thu Sep 26, 2019 4:51 pm

Chris wrote:
Thu Sep 26, 2019 12:43 pm
spaknives wrote:
Thu Sep 26, 2019 12:22 pm
Hello,
Yes, that's the camshaft pulley. That engine may be done... :sad:

The valves have probably crashed into the pistons bending the valves and denting the pistons. Best case scenario would be a head rebuild at a local engine shop with new valves, worst case is engine swap... Depending on the cost of the engine (I can price for you) it might be cheaper to swap than to repair the head.
Oh man, that is what I figured. Could you please give me a price on an engine? Serial # 3002639542
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