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Monday, February 24th, 2025 AT 8:00 AM
RWALBROEHL
- MEMBER
- 112 POSTS
Okay, thanks.
Code PO420, Service engine light?
RWALBROEHL
- MEMBER
- 112 POSTS
Okay, going into the 5th run the service engine light came back up with the PO442. I wrote down the list of possibilities that the scanner recommended. What's the best place to start. I already put a different gas cap and no help.
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Saturday, March 8th, 2025 AT 2:24 PM
STEVE W.
- MECHANIC
- 14,880 POSTS
A very small leak is this size or smaller - o very seldom is it the cap. I would get a smoke machine and set it up. Let it run a couple cycles and start hunting. One of the common leaks is on top of the tank where the pump housing cracks. The nest is the vent valve and the next is a bad tank pressure sensor.
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Saturday, March 8th, 2025 AT 6:38 PM
RWALBROEHL
- MEMBER
- 112 POSTS
So before it had the po440 which was saying cat low efficiency. On the 5th drive like I said above the po442 came up by itself only saying evap small leak. So can I assume the cat converter is ok or will it need more than 5 drive cycles to find out. Also can I drive without damage to the engine with this po442 code for now until I find the small leak. Maybe they engine conditioner and high test cured the cat code.
Thanks for the recommendations.
Thanks for the recommendations.
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Monday, March 10th, 2025 AT 8:33 AM
STEVE W.
- MECHANIC
- 14,880 POSTS
It will take a few drive cycles to show if the converter is functional or not. With the light on for the leak it likely will not run the cat test anyway. So that may still come back once you get the EVAP leak solved. The EVAP leak won't cause an issue other than the light being on and it may block other tests from running.
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Monday, March 10th, 2025 AT 11:18 AM
RWALBROEHL
- MEMBER
- 112 POSTS
Okay thanks, saw.
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Tuesday, March 11th, 2025 AT 11:20 AM
RWALBROEHL
- MEMBER
- 112 POSTS
Where would you inject the smoke machine in the 2003 chevy s10?
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Tuesday, March 11th, 2025 AT 11:21 AM
STEVE W.
- MECHANIC
- 14,880 POSTS
Pull the line off the purge solenoid and inject the smoke there.
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Tuesday, March 11th, 2025 AT 11:41 AM
RWALBROEHL
- MEMBER
- 112 POSTS
Purge solenoid is buried up behind this 4 cyl. Engine. I had to jack it up and take the right front wheel off, fender skirting and still could not see it and could only touch it with one hand. I am still not sure when I changed it if the purge solenoid valve vacuum line was secured enough. Horrible vehicle to work on. Need to find a different area to inject it. Can't low pressure air from a compressor find a leak with spray soap.
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Tuesday, March 11th, 2025 AT 11:47 AM
STEVE W.
- MECHANIC
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The problem with using anything over a few inches of water in the EVAP is that you can damage the pressure sensors and the valves. The typical solution is a BBQ grill regulator on the home built smokers. That drops the pressure down to just under a half of a psi. It's enough to get the smoke in and show the leaks.
To test the EVAP you need to get the smoke into the lines for the system. On some GMs there is a green capped service port for testing but those are somewhat hit or miss depending on the engine, model, and build date. If it has one you can connect there.
To test the EVAP you need to get the smoke into the lines for the system. On some GMs there is a green capped service port for testing but those are somewhat hit or miss depending on the engine, model, and build date. If it has one you can connect there.
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Tuesday, March 11th, 2025 AT 5:33 PM
RWALBROEHL
- MEMBER
- 112 POSTS
I need to replace my transmission fluid on my 2003 chevy s10 2.2 liter engine. Can I suck most of the fluid out of the dip stick location as I'm too old to crawl under the truck?
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Monday, March 24th, 2025 AT 2:53 PM
STEVE W.
- MECHANIC
- 14,880 POSTS
Even though this is the transmission we like to keep each question as a different one to make searches easier. We ask they each question be kept apart. But on that truck, if you park it with the left side barely higher than the right you can get most of the fluid out of the pan.
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Monday, March 24th, 2025 AT 9:58 PM
RWALBROEHL
- MEMBER
- 112 POSTS
By sucking it out through the dip stick? Any idea what I could buy to suck it out. I'll keep questions separate next time.
Thanks
Thanks
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Tuesday, March 25th, 2025 AT 6:29 AM
STEVE W.
- MECHANIC
- 14,880 POSTS
Well you can get units like this one in multiple places https://www.harborfreight.com/23-gallon-manual-fluid-extractor-62643.html . if you don't mind pumping the handle. Some parts stores have them as loaner tools.
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Tuesday, March 25th, 2025 AT 9:19 PM
RWALBROEHL
- MEMBER
- 112 POSTS
Hello Steve
A bit more info on the 2003 S-10. Reset code and driving it with the high test gas. It idles ok and accelerates ok up to about 45mph. At that point if I step on it the engine hangs at that point. If I back off and step it down real slow it will try to pick up. When I got home in the driveway in park I slowly increased them engine speed and at 4000rpm its stoped and started to drop off. Then back up to 4000 and then it would not go past that point. Whats your thoughts. Im going to make some more trips and see if I can get a code to cone back up and let you know. Did not change Cat yet
A bit more info on the 2003 S-10. Reset code and driving it with the high test gas. It idles ok and accelerates ok up to about 45mph. At that point if I step on it the engine hangs at that point. If I back off and step it down real slow it will try to pick up. When I got home in the driveway in park I slowly increased them engine speed and at 4000rpm its stoped and started to drop off. Then back up to 4000 and then it would not go past that point. Whats your thoughts. Im going to make some more trips and see if I can get a code to cone back up and let you know. Did not change Cat yet
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Friday, April 18th, 2025 AT 4:09 PM
STEVE W.
- MECHANIC
- 14,880 POSTS
That description could be a partially clogged converter. It's possible to check that through back pressure testing. I do that with a simple fuel pressure gauge and by drilling a small hole above the converter and driving in a short piece of brake line. Then attach the gauge to that. The other test is to just pull the front O2 sensor and see if it runs better.
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Saturday, April 19th, 2025 AT 7:55 PM
RWALBROEHL
- MEMBER
- 112 POSTS
Okay, thank you sir.
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Sunday, April 20th, 2025 AT 2:46 PM
STEVE W.
- MECHANIC
- 14,880 POSTS
Let us know what you found.
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Sunday, April 20th, 2025 AT 5:02 PM
RWALBROEHL
- MEMBER
- 112 POSTS
Okay. Going to be awhile as I'm having some medical issues and can't crawl under my truck. Took many recent surgeries.
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Monday, April 21st, 2025 AT 6:30 AM
STEVE W.
- MECHANIC
- 14,880 POSTS
Sorry to hear that. We will still be here though.
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Monday, April 21st, 2025 AT 1:28 PM
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