need help with codes
Thread Starter
Intermediate
Joined: Jun 2013
Posts: 27
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need help with codes
Hello im new to this site and i have a ?
I have a 2001 coupe and keep getting p0351 and a u1064.
i have changed the plugs the wires and the coil pack one #1 and still getting the codes i checked the grounds at the front that i was reading about on here that are all grouped together behind both headlights.
Any help would be great thanks . Billy
I have a 2001 coupe and keep getting p0351 and a u1064.
i have changed the plugs the wires and the coil pack one #1 and still getting the codes i checked the grounds at the front that i was reading about on here that are all grouped together behind both headlights.
Any help would be great thanks . Billy
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Pull the plug and ground it to the block and see if you are actually getting spark whrn the engine is being cranked
Misfire can also be caused by the following:
1. Low Compression
2. Bad/plugged Injector
3. Bad driver circuit in PCM
Start simple
Do you have proper compression?
Is fuel getting to the cylinder?
Is that plug getting SPARK?
BC
Misfire can also be caused by the following:
1. Low Compression
2. Bad/plugged Injector
3. Bad driver circuit in PCM
Start simple
Do you have proper compression?
Is fuel getting to the cylinder?
Is that plug getting SPARK?
BC
Thread Starter
Intermediate
Joined: Jun 2013
Posts: 27
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Bill thanks for the reply.
I will say that it runs great and you can go out for a ride and it will be fine then when you shut it off and go back to it with in say a 1/2 hour it will miss one time and set the code and then runs fine.
I will check the things you are saying.
Thanks again
I will say that it runs great and you can go out for a ride and it will be fine then when you shut it off and go back to it with in say a 1/2 hour it will miss one time and set the code and then runs fine.
I will check the things you are saying.
Thanks again
Burning Brakes
Joined: Dec 2003
Posts: 1,243
Likes: 5
From: Loveland CO
try moving the plug, wire, coil, injector to another cyl and see if your misfire follows (one at a time would help determine what item).. if so you have narrowed it down to one of thoes items. Inspect the wiring harness for the coil on that cyl and make sure it has not been pinched/broken or scraped. does the engine make any abnormal noises? might want to pull the valve cover and look for a broken spring, bent pushrod and damaged rocker. After that a Comp test will tell you if its a mechanical issue rather then a electrical. rings, chipped piston, bent valve, ect.. Hope for the best. If its not consistant i would think it wouldnt be a mechanical issue.. but easy enough to check.
S
S
Thread Starter
Intermediate
Joined: Jun 2013
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Thanks for the info I put new plugs,wires and a coil pack on #1 Today and it was better but still got that little miss and then the codes.
im going to look at the other things tomorrow and i hope to not find any thing bad.
im going to look at the other things tomorrow and i hope to not find any thing bad.
Thread Starter
Intermediate
Joined: Jun 2013
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Well did the compression test and checked the coil all is good so i went on to checking the injector unplug it and did an ohm test checked out good plug back in and started it has been running great maybe had a loose connection we will see. 
i did put injector cleaner in it also. Thanks for all the help. This is a great place
i did put injector cleaner in it also. Thanks for all the help. This is a great place
Thread Starter
Intermediate
Joined: Jun 2013
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Well I thought i fixed the problem and 2 days later and HELLO! same codes back it only misses 1 time on #1 cyl and then runs fine after that.
Codes are the same.
PO351
U1000
u1064
Im thinking electrical prob?
Codes are the same.
PO351
U1000
u1064
Im thinking electrical prob?
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Look very closely at the things that you CAN NOT swap! Use a magnifying glass and look at the coil plug connector female pins. Make sure that they are not bent and or deformed. If they are spread apart, the coil will not have proper connection. Go to the auto parts store and find a new male pin the same size as the male pin in the coil connector. Insert it into the coil connector female pins and make sure that the female pins have good grip on the male pin. Should require some force going in and pulling out.
Remove the wiring harness covering on that wiring harness all the way back to the main harness at the back of the engine. Find the wires specifically for that coil and make sure that they are not damaged. Look at the point where the wires are crimped on to the pins on the coil connector.
You are running out of easy options. If all that looks OK,, you most likely have a coil driver in the PCM thats weak or going bad or the connections/pins at the PCM could be suspect
Common power and ground are good because all the other coils are operating SAT
BC.
Remove the wiring harness covering on that wiring harness all the way back to the main harness at the back of the engine. Find the wires specifically for that coil and make sure that they are not damaged. Look at the point where the wires are crimped on to the pins on the coil connector.
You are running out of easy options. If all that looks OK,, you most likely have a coil driver in the PCM thats weak or going bad or the connections/pins at the PCM could be suspect
Common power and ground are good because all the other coils are operating SAT
BC.
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Thread Starter
Intermediate
Joined: Jun 2013
Posts: 27
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Well Bill i think i may have found a spot in the wiring harness where it was rubbing on a bracket for the fuel rail. So we will see.
Thanks for all the help i will keep you guys posted i will try to get a pic of the spot im talking about.
Thanks for all the help i will keep you guys posted i will try to get a pic of the spot im talking about.
Last edited by Dragsterguy; Jul 1, 2013 at 03:06 PM.