Can anyone please confirm the part numbers for the OCV?
I have 243553C100 for Bank2 and 243553C200 for Bank1. Is that correct? Thanks!
I have 243553C100 for Bank2 and 243553C200 for Bank1. Is that correct? Thanks!
2007 Kia Grand Carnival 3.8 VQ Auto Misfire P0300 and P0302
Hi all,
Hoping someone can help.
I'm having issues with my car, its only been with me for a month. Its got less than 200,000kms on it.
Recently while driving, the car started misfiring and trouble codes P0300 and P0302 came up.
I tried checking it myself by replacing the spark plugs and moving the injectors and coils around.
The P0300 and P0302 code stayed on after swapping coils, injectors and plugs around.
I replaced the fuel pump and no change.
Brought it to a mechanic nearby who blamed the leaking valve covers and replaced it.
After replacement, misfire stayed and codes are still the same.
We have plans this Easter but looks like we wont be going.
Thinking about bringing it to Kia due to Easter coming up, they are fully booked until mid April.
Any suggestions or ideas would help.
Thanks in advance.
Hoping someone can help.
I'm having issues with my car, its only been with me for a month. Its got less than 200,000kms on it.
Recently while driving, the car started misfiring and trouble codes P0300 and P0302 came up.
I tried checking it myself by replacing the spark plugs and moving the injectors and coils around.
The P0300 and P0302 code stayed on after swapping coils, injectors and plugs around.
I replaced the fuel pump and no change.
Brought it to a mechanic nearby who blamed the leaking valve covers and replaced it.
After replacement, misfire stayed and codes are still the same.
We have plans this Easter but looks like we wont be going.
Thinking about bringing it to Kia due to Easter coming up, they are fully booked until mid April.
Any suggestions or ideas would help.
Thanks in advance.
21 - 40 of 55 Posts
find some one with a scope and perform a relative compression test to rule out a mechanical issue (valves, compression), that way you wont have to tear engine down..
Yes, hopefully the dealership has those. So looks like ill just be waiting.find some one with a scope and perform a relative compression test to rule out a mechanical issue (valves, compression), that way you wont have to tear engine down..
I would not trust that 'mechanic' P300 is a random misfire code and P302 means cylinder 2 is misfiring, it is not uncommon to get a P300 and also the cylinder specific code, eg P301,P302, P303 upto P306.Hopefully thats the case. When i tested the OCV, it was moving freely. The only code im getting is a conistent P0300 and P0302. The mechanic did and they said its all close together. I dont have a compression tester with me. I might invest one.
243553C100 for Bank2 and 243553C200 for bank 1, the plugs and connectors are color coded to make mixing them up more difficult, the screens will deteriorate over time, they are definatly not your problem.
The mechanic did a compression test, as mentioned earlier so my suspicion is an injector not flowing as well as the others as you ruled out spark by swapping parts, maybe do a swap of the injectors on the front bank? A low flowing but working injector will not give a code
Hi bopbo, thanks for the part numbers.I would not trust that 'mechanic' P300 is a random misfire code and P302 means cylinder 2 is misfiring, it is not uncommon to get a P300 and also the cylinder specific code, eg P301,P302, P303 upto P306.
243553C100 for Bank2 and 243553C200 for bank 1, the plugs and connectors are color coded to make mixing them up more difficult, the screens will deteriorate over time, they are definatly not your problem.
The mechanic did a compression test, as mentioned earlier so my suspicion is an injector not flowing as well as the others as you ruled out spark by swapping parts, maybe do a swap of the injectors on the front bank? A low flowing but working injector will not give a code
Regarding the injectors, that was the 2nd thing i did after replacing plugs and coils. I swapped injector 2 to injector 6. The code remained at cylinder2 after all the resets.
Anyway, i went and ordered a compression tester, if i do find that what they told me is different i would be really pissed. Hopefully it gets here before i bring it in Kia as it will be pointless if the compression is down.
Those are the part numbers I get for my van (it's actually a 2008 Hyundai Entourage so same mechanical/electrical parts, occasionally different body/trim parts). 3C100 is the left hand unit.Can anyone please confirm the part numbers for the OCV?
I have 243553C100 for Bank2 and 243553C200 for Bank1. Is that correct? Thanks!
Can you feel the misfire when you drive the vehicle? If not, it doesn't sound like the vehicle is misfiring. You'd notice if one of the six cylinders missed a firing on a regular basis.Hi bopbo, thanks for the part numbers.
Regarding the injectors, that was the 2nd thing i did after replacing plugs and coils. I swapped injector 2 to injector 6. The code remained at cylinder2 after all the resets.
Anyway, i went and ordered a compression tester, if i do find that what they told me is different i would be really pissed. Hopefully it gets here before i bring it in Kia as it will be pointless if the compression is down.
Yes, i can definitely feel it misfiring. On initial startup its not smooth but you definitely know that theres a misfire, then the check engine light start flashing and the misfire gets really bad.Can you feel the misfire when you drive the vehicle? If not, it doesn't sound like the vehicle is misfiring. You'd notice if one of the six cylinders missed a firing on a regular basis.
Ive been on the diesel side of things in the past decade so going back to petrol cars and all the computers and sensors are a bit different to me.
Quick update.
Checking around the car again today. Looking for possible leaks and stuff. Im definitely doubting how the shop did their leak down and compression test now.
I drained the radiator to see any signs of oil, saw some sparkly bits which ive seen before. LIQUID HEADGASKET Repair. Looks like the previous owner tried to get away on the cheap.
Need to confirm first before I point any fingers but thats what im seeing at the moment.
Checking around the car again today. Looking for possible leaks and stuff. Im definitely doubting how the shop did their leak down and compression test now.
I drained the radiator to see any signs of oil, saw some sparkly bits which ive seen before. LIQUID HEADGASKET Repair. Looks like the previous owner tried to get away on the cheap.
Need to confirm first before I point any fingers but thats what im seeing at the moment.
Time to confirm with a chemical sniff test..
Update from Kia dealership.
They cant find the issue and is charging me $800 for the fault finding they did as they removed the manifold and checked the wiring and checked the compression. They said that the compression is good and are suggesting to replace the wiring harness.
The misfire is still there.
Any suggestions?
Thanks!
They cant find the issue and is charging me $800 for the fault finding they did as they removed the manifold and checked the wiring and checked the compression. They said that the compression is good and are suggesting to replace the wiring harness.
The misfire is still there.
Any suggestions?
Thanks!
That is not diagnosis nor a repair, that is a guess, what basis are the suggesting an expensive wiring harness replace with no foundation, google 'parts canon' it is common amongst workshops that lack proper diagnostic skill. If they checked the wiring why are they saying to replace it.......what part has failed or are they guessing?Update from Kia dealership.
They cant find the issue and is charging me $800 for the fault finding they did as they removed the manifold and checked the wiring and checked the compression. They said that the compression is good and are suggesting to replace the wiring harness.
The misfire is still there.
Any suggestions?
Thanks!
Hi bopbo,That is not diagnosis nor a repair, that is a guess, what basis are the suggesting an expensive wiring harness replace with no foundation, google 'parts canon' it is common amongst workshops that lack proper diagnostic skill. If they checked the wiring why are they saying to replace it.......what part has failed or are they guessing?
Thanks for your reply.
Theyre suggesting that because the previous workshop broke some of the plugs and covers for the wiring harness.
I have insisted that before that it already had the issue.
I have asked them to check the timing as well, apparently Kia does not have the ability to do that. So it really was a waste to be honest.
All they need is a scope, with no need to even remove the beauty covers.. Ah ! Of course they would also need a technician to read the scope..
Hi All,
Just did a compression test today.
Cylinder 1 - 175
Cylinder 2 - 174
Cylinder 3 - 155
Cylinder 4 - 170
Cylinder 5 - 175
Cylinder 6 -160
Looking at it, Cylinder 3 has the lowest compression but for some reason the car thinks that its cylinder 2. Could this be an ECU issue?
I'll be driving to Melbourne in a couple of weeks to get a used engine. So might as well grab all the wiring and ECU.
I read that someone replaced their ECU with the same number, any ideas what they were referring to?
Thanks all!
Just did a compression test today.
Cylinder 1 - 175
Cylinder 2 - 174
Cylinder 3 - 155
Cylinder 4 - 170
Cylinder 5 - 175
Cylinder 6 -160
Looking at it, Cylinder 3 has the lowest compression but for some reason the car thinks that its cylinder 2. Could this be an ECU issue?
I'll be driving to Melbourne in a couple of weeks to get a used engine. So might as well grab all the wiring and ECU.
I read that someone replaced their ECU with the same number, any ideas what they were referring to?
Thanks all!
I fail to understand the reason for a replacement engine, ECU or wiring issue.
You so far have not proved any as the fault. Looking at the list of codes there is an issue with the comms circuit, that need to be rectified first.
Yes the ECU can sometimes flag an adjacent cylinder in it misfire counter. Get the use of a pro level scanner and run a cylinder balance test to confirm engine condition.. or even just a relative compression test (scope)..
You so far have not proved any as the fault. Looking at the list of codes there is an issue with the comms circuit, that need to be rectified first.
Yes the ECU can sometimes flag an adjacent cylinder in it misfire counter. Get the use of a pro level scanner and run a cylinder balance test to confirm engine condition.. or even just a relative compression test (scope)..
Hi leo,I fail to understand the reason for a replacement engine, ECU or wiring issue.
You so far have not proved any as the fault. Looking at the list of codes there is an issue with the comms circuit, that need to be rectified first.
Yes the ECU can sometimes flag an adjacent cylinder in it misfire counter. Get the use of a pro level scanner and run a cylinder balance test to confirm engine condition.. or even just a relative compression test (scope)..
Thanks for your reply.
What i know at the moment is that it runs fairly okay when the check engine light is not flashing.
Injectors, coils and plugs are good, but for some reason when P0302 comes up it kills the coils and injector for that cylinder.
The reason for me to get a replacement engine and wiring is that there has been evident use of head gasket repair in a bottle and that the wiring has been ripped apart by different mechanics. ECU is just an extra while im there.
Would love to get a pro level scanner and do the scope but for some reason workshops here in Sydney charge $200 an hour for initial diagnostics/ looking at it and doing nothing. Not really in to charity. Plus no one can actually point me to a good workshop around here, unfortunately.
Thanks.
I have replaced both an engine and ECU not at the same time, engine swap was no harder than i thought it would be, the ECU swap was done as it was having network issues. I swapped the ECU AND the keys that came with the car that matched the car to avoid programming issues. I was plug and play for the ECU and keys the remote fobs are programmed to the BCM, so the original fobs will still work.
Hi bopbo, when you replaced the engine, did you drop the subframe?I have replaced both an engine and ECU not at the same time, engine swap was no harder than i thought it would be, the ECU swap was done as it was having network issues. I swapped the ECU AND the keys that came with the car that matched the car to avoid programming issues. I was plug and play for the ECU and keys the remote fobs are programmed to the BCM, so the original fobs will still work.
Ive got a cherry picker but most likely not a high enough jack stand. I dont want to lose the AC when replacing the engine.
I got an engine and trans and reckon it will save me a few minutes (just an excuse to have a spare trans and tc) when replacing it.
Do you have some steps or tips? Its my first time replacing engine and trans in a carnival.
Regarding the ECU, does that mean that you had to replace the door locks and ignition barrel as well?
Thanks.
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