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P0304, P0306, P0174, and P1000 HELP!!!!!!!!!!

 
Old 07-02-2018, 10:38 PM
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Default P0304, P0306, P0174, and P1000 HELP!!!!!!!!!!

I am new here, and I am sorry if this has already been talked about. As the title states, I need help! My truck had a cylinder 4 misfire last year, and I replaced plugs, wires, and both coil packs, but it is still running rough. Today while driving I had a flashing CEL. I went home and ran the diagnostics and these codes came up.
I have checked for vacuum leaks, but I can not find any leak. I also replaced the EGR solenoid valve because I had a code thrown about 4 months ago.
When I start the truck it will huff air and then bog down and then rev up again. It also idles rough like it has a misfire. The truck has never given me issues since I got it back in 2015. The exact mileage is unknown, but the truck has been taken care of since I have owned it. Tips and pointers would be very appreciative, and I will try just about anything to help figure out the issue.

Thanks in advance.
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Old 07-02-2018, 11:56 PM
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It would help if you supplied the description of what the codes mean, if you have them. People could look them up but you should have done it already.

Also, year and engine of your rig. Manual or automatic? Why don't you know the mileage? No odometer?
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Old 07-03-2018, 01:22 PM
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With what you have for codes, you have a misfire on #4 and #6. The P1000 is a readiness code, so don't worry about that one. The P0174 is your last thing to fix. Fix the misfires first, then check all the hosing for the emissions. The 174 code could be a dirty MAF, or vacuum leak. Clean the MAF, and if you use a K&N, make sure you aren't over oiling it. These filters will set a 174 code if they are over oiled.

These are everyday codes that most of the people on here know about and can answer with a fair amount of accuracy. Any P30x code is a cylinder misfire. 1000 means it's not fully ready for emission testing. P171 and 174 are lean codes. Normal everyday codes for both Ford's and a lot of Chevy's too.

Last edited by akdoggie; 07-03-2018 at 01:29 PM.
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Old 07-04-2018, 12:24 AM
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Originally Posted by BareBonesXL View Post
It would help if you supplied the description of what the codes mean, if you have them. People could look them up but you should have done it already.

Also, year and engine of your rig. Manual or automatic? Why don't you know the mileage? No odometer?
My truck is a 97 f150 4.6. The codes P0304 and P0306 are misfire codes on cylinder 4 and cylinder 6. I have already looked them up... I have recently replaced the plugs, wires, and both cool packs. I am pretty knowledgeable about motors, but I am stumped because I have tried to test for vacuum leaks and I come up empty handed. The odometer is broke and stuck on 157,xxx Miles and has been that way since I got the truck in 2015.
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Old 07-04-2018, 12:30 AM
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Originally Posted by akdoggie View Post
With what you have for codes, you have a misfire on #4 and #6. The P1000 is a readiness code, so don't worry about that one. The P0174 is your last thing to fix. Fix the misfires first, then check all the hosing for the emissions. The 174 code could be a dirty MAF, or vacuum leak. Clean the MAF, and if you use a K&N, make sure you aren't over oiling it. These filters will set a 174 code if they are over oiled.

These are everyday codes that most of the people on here know about and can answer with a fair amount of accuracy. Any P30x code is a cylinder misfire. 1000 means it's not fully ready for emission testing. P171 and 174 are lean codes. Normal everyday codes for both Ford's and a lot of Chevy's too.
I am going to pull my plugs tomorrow, and see how they look. I just put a new set in about a month ago. Along with wires and cool packs. Is there anything else that could throw a misfire code that I need to look for? I have checked for vacuum leaks, but can't find one. Thanks
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Old 07-04-2018, 01:13 AM
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what kind of plugs did you use?
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Old 07-05-2018, 04:17 PM
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Right, for someone who's asking for tips and calls himself knowledgeable....why would you leave out plug type ? Doesn't make sense, that is key.
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