P0174 code/running rough
#1
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Hey all,
I'm getting the P0174 code only. Runs fine when cold. When hot, things deteriorate quickly. Loses power over about a 5 minute span until it's barely idling, and upon throttle will stall. Starts back up each time, although it goes back to barely running. If I let it cool down completely it runs fine until it gets hot again.
Seems like the intake or gaskets to me. something moving under heat. I'd like to hear you all's take on it though. Thank you in advance.
Nick
I'm getting the P0174 code only. Runs fine when cold. When hot, things deteriorate quickly. Loses power over about a 5 minute span until it's barely idling, and upon throttle will stall. Starts back up each time, although it goes back to barely running. If I let it cool down completely it runs fine until it gets hot again.
Seems like the intake or gaskets to me. something moving under heat. I'd like to hear you all's take on it though. Thank you in advance.
Nick
#3
#4
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Do you have a scanner that can read live data? I would start with cleaning the MAF sensor. I know some people are against using brake cleaner but, I’ve cleaned hundreds of MAF sensors (even on my own cars) and never had an issue. You can of course use MAF sensor cleaner from the parts store. If you have compressed air to blow it dry, that can also aid in cleaning.
#7
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I currently have a P0511 - this also initially looks like a PCM related issue, like your code.
I also swapped the fuel filter - like yours very old and dirty, and this already helped a lot.
But that is not all. I may be an additional vacuum leak - I am still working on that issue.
Maybe you also have a vacuum issue, maybe not.
But if your problem got worse after changing the fuel filter, it sounds a little bit logically to me that the issue may be the same as in below link, were it seemed to be some blocked fuel injectors, the PCM tried to compensate for those, pumped more fuel and those injectors, which were OK, then flooded the chambers...:
https://www.jaguarforums.com/forum/x...solved-105386/
PS: Greetings to the state (Indiana), where James Dean was born...
I also swapped the fuel filter - like yours very old and dirty, and this already helped a lot.
But that is not all. I may be an additional vacuum leak - I am still working on that issue.
Maybe you also have a vacuum issue, maybe not.
But if your problem got worse after changing the fuel filter, it sounds a little bit logically to me that the issue may be the same as in below link, were it seemed to be some blocked fuel injectors, the PCM tried to compensate for those, pumped more fuel and those injectors, which were OK, then flooded the chambers...:
https://www.jaguarforums.com/forum/x...solved-105386/
PS: Greetings to the state (Indiana), where James Dean was born...
Last edited by Peter_of_Australia; Today at 06:13 PM. Reason: Added PS note
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