Answers
Jul 17, 2024 - 12:23 PM
Addendum: Compression check numbers: 1 = 125, 2 = 150, 3= 140, 4 = 150, 5 = 130, 6 = 150.Rescan vehicle with engine running using Zurich Z13S and now have multiple codes. They are, P0301 (Cylinder 1 misfire detected), P0305 (Cylinder 5 misfire detected), P0306 (Cylinder 6 misfire detected), P0300 (Multiple misfire detected), P1399 (Misfire in any cylinder). This was done yesterday, July 16, 2024. Would you start looking at distributor, coil packs and fuel injectors? Help?
Jul 17, 2024 - 02:28 PM
Hello there, Paul!
Alright, let's unpack this coolant gremlin in your 2002 Accord. It's definitely a head-scratcher with those conflicting diagnoses.
Here's what I think based on the info:
1.) P0302 Code: This points to a misfire in cylinder number 2. Good call on replacing the plugs, but it could be a coil issue despite moving them around. We'll circle back to that.
2.) The main concern is coolant loss and air in the radiator. No visible leaks and a good compression check are promising, but the burping radiator is a red flag. It suggests air entering the system, which shouldn't happen.
3.) Burping Radiator: Since you've noticed the radiator burping air, it suggests there might be air trapped in the system. Start with a thorough bleeding of the cooling system to ensure all air pockets are removed. Sometimes trapped air can cause erratic temperature readings and coolant loss.
Now, those techs' suggestions:
Mechanic #1 (Replace Everything): Hold off on the shotgun approach for now. Replacing a good water pump or thermostat is throwing money at the problem.
Mechanic #2 (Mega Tune-Up): A tune-up at 230,000 miles might not hurt, but it's unlikely to solve the coolant issue directly. Plus, you just replaced the plugs.
Mechanic #3 (Sensor Cleaning): Cleaning the MAF and EGR temp sensor is cheap and might be worth a shot, but it's a long shot based on the symptoms.
Here's what I'd recommend:
Focus on the Misfire: Since the P0302 code and coolant loss might be connected, delve deeper into cylinder #2's misfire. Swap the coil on cylinder #2 with another one and see if the code jumps to a different cylinder. This will confirm if it's a bad coil. Coolant System Pressure Test: This is a more targeted approach. A pressure test will pinpoint leaks you might be missing visually, especially around the head gasket (which could explain the air in the system).
Consider steps:
A) Bleed the cooling system and perform a pressure test.
B) Check the fuel injector for cylinder 2 and consider a leak-down test.
C) Monitor for any signs of head gasket issues (white smoke, milky oil, etc.)
D) Evaluate the condition of the water pump and thermostat.
Let's fix the misfire first and see if the coolant issue resolves. If not, the pressure test will guide the next steps. By following this systematic approach, you can narrow down the root cause more effectively without immediately resorting to extensive and costly repairs. No need for a major overhaul just yet. Keep me posted on what you find!
Once you've identified which part needs to be replaced, you will need some parts. Click this link to be directed to our website where your vehicle information has already been entered. Simply enter the part's name into the search field to get started.
Alright, let's unpack this coolant gremlin in your 2002 Accord. It's definitely a head-scratcher with those conflicting diagnoses.
Here's what I think based on the info:
1.) P0302 Code: This points to a misfire in cylinder number 2. Good call on replacing the plugs, but it could be a coil issue despite moving them around. We'll circle back to that.
2.) The main concern is coolant loss and air in the radiator. No visible leaks and a good compression check are promising, but the burping radiator is a red flag. It suggests air entering the system, which shouldn't happen.
3.) Burping Radiator: Since you've noticed the radiator burping air, it suggests there might be air trapped in the system. Start with a thorough bleeding of the cooling system to ensure all air pockets are removed. Sometimes trapped air can cause erratic temperature readings and coolant loss.
Now, those techs' suggestions:
Mechanic #1 (Replace Everything): Hold off on the shotgun approach for now. Replacing a good water pump or thermostat is throwing money at the problem.
Mechanic #2 (Mega Tune-Up): A tune-up at 230,000 miles might not hurt, but it's unlikely to solve the coolant issue directly. Plus, you just replaced the plugs.
Mechanic #3 (Sensor Cleaning): Cleaning the MAF and EGR temp sensor is cheap and might be worth a shot, but it's a long shot based on the symptoms.
Here's what I'd recommend:
Focus on the Misfire: Since the P0302 code and coolant loss might be connected, delve deeper into cylinder #2's misfire. Swap the coil on cylinder #2 with another one and see if the code jumps to a different cylinder. This will confirm if it's a bad coil. Coolant System Pressure Test: This is a more targeted approach. A pressure test will pinpoint leaks you might be missing visually, especially around the head gasket (which could explain the air in the system).
Consider steps:
A) Bleed the cooling system and perform a pressure test.
B) Check the fuel injector for cylinder 2 and consider a leak-down test.
C) Monitor for any signs of head gasket issues (white smoke, milky oil, etc.)
D) Evaluate the condition of the water pump and thermostat.
Let's fix the misfire first and see if the coolant issue resolves. If not, the pressure test will guide the next steps. By following this systematic approach, you can narrow down the root cause more effectively without immediately resorting to extensive and costly repairs. No need for a major overhaul just yet. Keep me posted on what you find!
Once you've identified which part needs to be replaced, you will need some parts. Click this link to be directed to our website where your vehicle information has already been entered. Simply enter the part's name into the search field to get started.
Jul 19, 2024 - 02:36 AM
Hi there, Paul!
It sounds like you're on the right track! Since the coil swap didn’t change the code and you’ve ruled out head gasket issues with the block test, focusing on the cooling system and misfires is a smart move.
Here’s my suggested next steps:
1.) Fuel Injectors: Yes, swapping the fuel injectors between cylinders could help determine if the misfires are injector-related. If the misfires follow the injector, you'll know it’s the culprit.
2.) Cooling System: The burping radiator points to air in the system, which can cause erratic behavior. A thorough drain, flush, and refill should help. After that, run a pressure test to check for any hidden leaks.
3.) Further Diagnosis:
a.) Misfires in Multiple Cylinders: Since you’re now seeing misfires in cylinders 1, 5, and 6, it’s worth checking the fuel system and ensuring all connections and hoses are secure and in good condition.
b.) OBD2 Data: Keep monitoring your OBD2 scanner for any changes or new codes. This can provide more clues.
By systematically tackling these areas, you’re making solid progress toward resolving the issues. Keep me updated on your findings!
If you need any parts, don’t forget you can use our website with your vehicle information already entered for an easy search.
Good luck, and let me know if you need more help!
It sounds like you're on the right track! Since the coil swap didn’t change the code and you’ve ruled out head gasket issues with the block test, focusing on the cooling system and misfires is a smart move.
Here’s my suggested next steps:
1.) Fuel Injectors: Yes, swapping the fuel injectors between cylinders could help determine if the misfires are injector-related. If the misfires follow the injector, you'll know it’s the culprit.
2.) Cooling System: The burping radiator points to air in the system, which can cause erratic behavior. A thorough drain, flush, and refill should help. After that, run a pressure test to check for any hidden leaks.
3.) Further Diagnosis:
a.) Misfires in Multiple Cylinders: Since you’re now seeing misfires in cylinders 1, 5, and 6, it’s worth checking the fuel system and ensuring all connections and hoses are secure and in good condition.
b.) OBD2 Data: Keep monitoring your OBD2 scanner for any changes or new codes. This can provide more clues.
By systematically tackling these areas, you’re making solid progress toward resolving the issues. Keep me updated on your findings!
If you need any parts, don’t forget you can use our website with your vehicle information already entered for an easy search.
Good luck, and let me know if you need more help!
Jul 23, 2024 - 11:05 PM
Hi Paul,
Thanks for the update! If the scanner suggested checking the EGR valve and cleaning the ports, it's definitely worth considering. Carbon buildup can cause all sorts of issues, including misfires.
I’d recommend adding the EGR valve inspection and cleaning to your to-do list. It’s a good step to take alongside your planned radiator drain, flush, and refill.
Keep me posted on how it goes this weekend, and let me know if you need any more help.
Good luck!
Thanks for the update! If the scanner suggested checking the EGR valve and cleaning the ports, it's definitely worth considering. Carbon buildup can cause all sorts of issues, including misfires.
I’d recommend adding the EGR valve inspection and cleaning to your to-do list. It’s a good step to take alongside your planned radiator drain, flush, and refill.
Keep me posted on how it goes this weekend, and let me know if you need any more help.
Good luck!
Aug 09, 2024 - 12:26 AM
Hi Paul!
That's fantastic to hear! You really took charge of the situation, and it paid off. It's always satisfying when a bit of DIY effort and the right tools can save you a ton of money, especially when the experts didn't quite hit the mark. Sounds like your 2002 Honda Accord is back in top shape — well done! If you ever need any more advice or run into other issues, feel free to reach out. Keep up the great work!
That's fantastic to hear! You really took charge of the situation, and it paid off. It's always satisfying when a bit of DIY effort and the right tools can save you a ton of money, especially when the experts didn't quite hit the mark. Sounds like your 2002 Honda Accord is back in top shape — well done! If you ever need any more advice or run into other issues, feel free to reach out. Keep up the great work!
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