# 2014 Buick Regal Di Turbo P0302/P0299 **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** regal, engines, buick\ **Created:** [September 2, 2024, 5:33pm UTC](https://community.cartalk.com/t/2014-buick-regal-di-turbo-p0302-p0299/196067 "2024-09-02T17:33:55Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![Kushycrypto](https://avatars.discourse-cdn.com/v4/letter/k/0ea827/32.png) [@Kushycrypto](https://community.cartalk.com/u/Kushycrypto)\ **Post date:** [September 2, 2024, 5:33pm UTC](https://community.cartalk.com/t/2014-buick-regal-di-turbo-p0302-p0299/196067/1 "2024-09-02T17:33:55Z")
Buick regal 2014 2L 4cyl Di Turbo. Ran almost out of gas. Like put put almost out of gas. Filled up, drove maybe 800yd home. Let sot overnight. Tried to go to work in morning and now engine is stuttering, extremely sluggish put put acceleration in 1st and 2nd gear, then takes off fine, while idling stuttering, stabilitrak light is lit, (CEL) blinking orange then constant. Used code reader and got P0302(cyl 2 misfire), P0299(Engine Underboosted), and U0401-71(one or more modules onboard the vehicle has received invalid data from the ECM). I have replaced the spark plugs, filled up with 93 octane+bottle of HEET, still ran cruddy. Filled up with 93 octane + seafoam with 2:1 foam:fuel ratio for concentrated cleaning. Alternator is good, battery is brand new. Any ideas anyone? To broke to take it to mechanic, payday is a week away, and i have to drive back and forth to work so need to get figured out and fixed ASAP please ---
**Author:** ![TwinTurbo](https://avatars.discourse-cdn.com/v4/letter/t/8baadc/32.png) [@TwinTurbo](https://community.cartalk.com/u/TwinTurbo)\ **Post date:** [September 2, 2024, 5:37pm UTC](https://community.cartalk.com/t/2014-buick-regal-di-turbo-p0302-p0299/196067/2 "2024-09-02T17:37:02Z")
Swap #2 injector with a different one and see if the problem follows the injector. ---
**Author:** ![Kushycrypto](https://avatars.discourse-cdn.com/v4/letter/k/0ea827/32.png) [@Kushycrypto](https://community.cartalk.com/u/Kushycrypto)\ **Post date:** [September 2, 2024, 5:39pm UTC](https://community.cartalk.com/t/2014-buick-regal-di-turbo-p0302-p0299/196067/3 "2024-09-02T17:39:35Z")
Okay, thank you. Headed back from autozone. Reset codes and worked fine for a few cycles, then started misfiring again. Will let you know if it follows the injector or not. ---
**Author:** ![TwinTurbo](https://avatars.discourse-cdn.com/v4/letter/t/8baadc/32.png) [@TwinTurbo](https://community.cartalk.com/u/TwinTurbo)\ **Post date:** [September 2, 2024, 5:46pm UTC](https://community.cartalk.com/t/2014-buick-regal-di-turbo-p0302-p0299/196067/4 "2024-09-02T17:46:27Z")
Before you dig in, look up the process to swap them. For a DI setup, it’s a bit more involved than the typical injection system. But if you’re looking to save some $ and do the work yourself, it’s one way to divide and conquer the problem- eliminate the fuel delivery aspect which is somewhat suspect due to the running low recently. ---
**Author:** ![Kushycrypto](https://avatars.discourse-cdn.com/v4/letter/k/0ea827/32.png) [@Kushycrypto](https://community.cartalk.com/u/Kushycrypto)\ **Post date:** [September 2, 2024, 5:46pm UTC](https://community.cartalk.com/t/2014-buick-regal-di-turbo-p0302-p0299/196067/5 "2024-09-02T17:46:55Z")
Well i have to get the tool to take the injectors out, and break it down to the injectors first, just looked up the process. ---
**Author:** ![TwinTurbo](https://avatars.discourse-cdn.com/v4/letter/t/8baadc/32.png) [@TwinTurbo](https://community.cartalk.com/u/TwinTurbo)\ **Post date:** [September 2, 2024, 5:48pm UTC](https://community.cartalk.com/t/2014-buick-regal-di-turbo-p0302-p0299/196067/6 "2024-09-02T17:48:14Z")
Best of luck, fingers crossed for you. Hope you find the problem quickly and get it fixed as inexpensively as possible! ---
**Author:** ![Kushycrypto](https://avatars.discourse-cdn.com/v4/letter/k/0ea827/32.png) [@Kushycrypto](https://community.cartalk.com/u/Kushycrypto)\ **Post date:** [September 2, 2024, 5:49pm UTC](https://community.cartalk.com/t/2014-buick-regal-di-turbo-p0302-p0299/196067/7 "2024-09-02T17:49:45Z")
Could bad fuel or water/debris in the fuel be the culprit before i go breaking everything down. I mean never had a problem out of the car, ran so low didnt know if i was going to make it to gas station or be walking, then bam all this immediately next time starting the car. Its been hot and dry the whole time so not water or moisture on coils i dont believe. ---
**Author:** ![db4690](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/db4690/32/2583_2.png) [@db4690](https://community.cartalk.com/u/db4690)\ **Post date:** [September 2, 2024, 5:50pm UTC](https://community.cartalk.com/t/2014-buick-regal-di-turbo-p0302-p0299/196067/8 "2024-09-02T17:50:15Z")
> [@TwinTurbo](#): > > Swap #2 injector with a different one and see if the problem follows the injector. Considering this seems to be a direct-injection engine, I’m not sure that’s all that easy to do properly. afaik, every seal and line you touch on the high pressure side needs to be replaced any time it’s loosened Depending on how accessible the coils are, it might be easier to swap and/or replace coils ---
**Author:** ![Kushycrypto](https://avatars.discourse-cdn.com/v4/letter/k/0ea827/32.png) [@Kushycrypto](https://community.cartalk.com/u/Kushycrypto)\ **Post date:** [September 2, 2024, 5:55pm UTC](https://community.cartalk.com/t/2014-buick-regal-di-turbo-p0302-p0299/196067/9 "2024-09-02T17:55:12Z")
Looking it up it seems the injectors are under the manifold ---
**Author:** ![db4690](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/db4690/32/2583_2.png) [@db4690](https://community.cartalk.com/u/db4690)\ **Post date:** [September 2, 2024, 5:57pm UTC](https://community.cartalk.com/t/2014-buick-regal-di-turbo-p0302-p0299/196067/10 "2024-09-02T17:57:46Z")
Can the ignition coils be removed without removing the intake? ---
**Author:** ![Kushycrypto](https://avatars.discourse-cdn.com/v4/letter/k/0ea827/32.png) [@Kushycrypto](https://community.cartalk.com/u/Kushycrypto)\ **Post date:** [September 2, 2024, 6:01pm UTC](https://community.cartalk.com/t/2014-buick-regal-di-turbo-p0302-p0299/196067/11 "2024-09-02T18:01:04Z")
Yes the coils and plugs are on the top easily accessible. I have already replaced the spark plugs, the old ones were blackened and looked soot-covered. Just changed the oil too, no coolant in the oil. ---
**Author:** ![Mustangman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mustangman/32/44130_2.png) [@Mustangman](https://community.cartalk.com/u/Mustangman)\ **Post date:** [September 2, 2024, 6:13pm UTC](https://community.cartalk.com/t/2014-buick-regal-di-turbo-p0302-p0299/196067/12 "2024-09-02T18:13:07Z")
> [@Kushycrypto](#): > > P0299(Engine Underboosted And this… > [@Kushycrypto](#): > > I have already replaced the spark plugs, the old ones were blackened and looked soot-covered I hate to suggest it but… Blown turbo seals. You’d lose boost and blow oil through the intake and oil-up the plugs causing a misfire. Pop the turbo cold side outlet hose to the manifold and look for lots of oil inside. ---
**Author:** ![Kushycrypto](https://avatars.discourse-cdn.com/v4/letter/k/0ea827/32.png) [@Kushycrypto](https://community.cartalk.com/u/Kushycrypto)\ **Post date:** [September 2, 2024, 6:14pm UTC](https://community.cartalk.com/t/2014-buick-regal-di-turbo-p0302-p0299/196067/13 "2024-09-02T18:14:25Z")
Turbo cold side outlet hose, going to manifold. Brb, looking up ---
**Author:** ![Nevada\_545](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/nevada_545/32/41232_2.png) [@Nevada\_545](https://community.cartalk.com/u/Nevada_545)\ **Post date:** [September 2, 2024, 6:46pm UTC](https://community.cartalk.com/t/2014-buick-regal-di-turbo-p0302-p0299/196067/14 "2024-09-02T18:46:18Z")
> [@Kushycrypto](#): > > P0299(Engine Underboosted) Inspect for leaks in the intercooler and associated pipes. Something as simple as a loose intercooler hose clamp can cause an air pressure leak and result in an over-rich fuel mixture. ---
**Author:** ![db4690](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/db4690/32/2583_2.png) [@db4690](https://community.cartalk.com/u/db4690)\ **Post date:** [September 2, 2024, 6:51pm UTC](https://community.cartalk.com/t/2014-buick-regal-di-turbo-p0302-p0299/196067/15 "2024-09-02T18:51:05Z")
I would first swap coils and see if the misfire moves to a different cylinder . . . and you can also examine if the coil boots look okay, or if they’ve been letting water and/or condensation into the spark plug tube(s) ---
**Author:** ![Kushycrypto](https://avatars.discourse-cdn.com/v4/letter/k/0ea827/32.png) [@Kushycrypto](https://community.cartalk.com/u/Kushycrypto)\ **Post date:** [September 2, 2024, 6:51pm UTC](https://community.cartalk.com/t/2014-buick-regal-di-turbo-p0302-p0299/196067/16 "2024-09-02T18:51:28Z")
Im lost pn finding the hose, but checking the new plugs i installed, no oil in the plugs ---
**Author:** ![db4690](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/db4690/32/2583_2.png) [@db4690](https://community.cartalk.com/u/db4690)\ **Post date:** [September 2, 2024, 6:52pm UTC](https://community.cartalk.com/t/2014-buick-regal-di-turbo-p0302-p0299/196067/17 "2024-09-02T18:52:29Z")
Does your device also give you live data? ---
**Author:** ![Kushycrypto](https://avatars.discourse-cdn.com/v4/letter/k/0ea827/32.png) [@Kushycrypto](https://community.cartalk.com/u/Kushycrypto)\ **Post date:** [September 2, 2024, 6:55pm UTC](https://community.cartalk.com/t/2014-buick-regal-di-turbo-p0302-p0299/196067/18 "2024-09-02T18:55:50Z")
Theres something loose-ish on top on the engine where the coils are. From just looking, if theres not a seal or anything then this could be something. Ill post a picture in a minute. Ive been running back and forth to autozone, at walmart about to try and find an affordable reader ---
**Author:** ![Kushycrypto](https://avatars.discourse-cdn.com/v4/letter/k/0ea827/32.png) [@Kushycrypto](https://community.cartalk.com/u/Kushycrypto)\ **Post date:** [September 2, 2024, 6:58pm UTC](https://community.cartalk.com/t/2014-buick-regal-di-turbo-p0302-p0299/196067/19 "2024-09-02T18:58:35Z")
![17253034264642866605235030836985](https://global.discourse-cdn.com/cartalk/original/3X/0/7/07ddcc0ebd1bcde57508f3b915ca9ff755a1eeef.jpeg) And this is what autozone gave me after they ran the codes last. ---
**Author:** ![George\_San\_Jose1](https://avatars.discourse-cdn.com/v4/letter/g/e5b9ba/32.png) [@George\_San\_Jose1](https://community.cartalk.com/u/George_San_Jose1)\ **Post date:** [September 3, 2024, 7:54pm UTC](https://community.cartalk.com/t/2014-buick-regal-di-turbo-p0302-p0299/196067/21 "2024-09-03T19:54:58Z")
> [@Kushycrypto](#): > > Alternator is good, battery is brand new. > [@Kushycrypto](#): > > modules onboard the vehicle has received invalid data from the ECM). If there’s any possibility either of those isn’t performing up to spec, do the simple tests first, and have your shop do their standard alternator-battery test. My diy’er version is: before the first start of the day, the battery should measure about 12.6 volts, then immediately after starting the engine, 13.5-15.5 volts. If your shop gets different numbers, you are welcome to post them here for more ideas. Your battery might be “new” but not fully charged for example. That can confuse the computers.