[Redsson6669]

I just bought a 2019 gmc terrain, and I notice if I punch the gas pedal to pass or just wanting to get up and go, I will get a flashing check engine light( misfire) and traction control light comes on. Now after I bring it to a coast or a steady gas pedal the check engine will go away, traction stays on though. But if I drive it like an old lady, the car runs fine. I can slowly accelerate to a 100 mph and everything is fine runs great. I just can t punch the gas. Anyone else experiencing this? Or anyone have an answer?

 

[Colt Hero]

Yup! I've seen that before. Just got home from work tonight and my next door neighbor was in his driveway with the hood open ... same problem ... but with a 2003 Ford Taurus sedan (160k miles). I read his OBD port and, sure enough, Misfire on Cylinder #2 (plus 3 other Codes ... one of which was his O2 Sensor ... can't recall the other two, but he took pictures). He said he was having the flashing CEL whenever he punched the gas. At Idle, in the driveway, it sounded fine ... but when he started steadily pushing down on the Accelerator, you could hear some light "skipping" or "choppiness" with the Engine's firing. We quickly pulled his three front plugs (#4, #5, and #6) and found they were wet with oil ... so I think he might have a bigger problem ... like oil getting past his Rings, soaking the Plugs.

But for you, with a much younger 2019 Terrain ... and no history of that kind of thing ... maybe just read your OBD-2 port and see if you've got a P301-P304 Code for a mis-firing Plug. That might be all it is. If you don't have a Code Reader, your local chain Auto Parts Store will usually do it for free (O'Reilly's, AutoZone, Advance Auto).

 

[RIT333]

If you are quickly accelerating to 100 mph, maybe that flashing light is a reflection in your rear view mirror, from a car chasing you. Does is say on it's hood ECILOP ? LOL

 

[Redsson6669]

Yup! I've seen that before. Just got home from work tonight and my next door neighbor was in his driveway with the hood open ... same problem ... but with a 2003 Ford Taurus sedan (160k miles). I read his OBD port and, sure enough, Misfire on Cylinder #2 (plus 3 other Codes ... one of which was his O2 Sensor ... can't recall the other two, but he took pictures). He said he was having the flashing CEL whenever he punched the gas. At Idle, in the driveway, it sounded fine ... but when he started steadily pushing down on the Accelerator, you could hear some light "skipping" or "choppiness" with the Engine's firing. We quickly pulled his three front plugs (#4, #5, and #6) and found they were wet with oil ... so I think he might have a bigger problem ... like oil getting past his Rings, soaking the Plugs.

But for you, with a much younger 2019 Terrain ... and no history of that kind of thing ... maybe just read your OBD-2 port and see if you've got a P301-P304 Code for a mis-firing Plug. That might be all it is. If you don't have a Code Reader, your local chain Auto Parts Store will usually do it for free (O'Reilly's, AutoZone, Advance Auto).

I put in 4 new injectors and 4 new one plugs. I’m thinking at hard acceleration and can’t keep the 14-1 fuel air ratio. And it’s a 1.5 turbo.. not turbo like you might think, it’s turbo instead of naturally aspirated. 50k unbelievable!!! I think that’s just the way it is.. should of got the 2.0 .. will do better research next time.

 

[Colt Hero]

I put in 4 new injectors and 4 new one plugs. I’m thinking at hard acceleration and can’t keep the 14-1 fuel air ratio. And it’s a 1.5 turbo.. not turbo like you might think, it’s turbo instead of naturally aspirated. 50k unbelievable!!! I think that’s just the way it is.. should of got the 2.0 .. will do better research next time.

But we've got other Gen-3 owners here ... and I haven't seen this complaint from any of them? Maybe they're not "punching the gas" enough to see it happen?

Maybe try looking at your Fuel Delivery System to make sure it's maintaining proper pressure? Or maybe there's an issue with your Accelerator Sensor/Throttle Body?

 

[Ultrascott]

@Redsson6669 you have excessive carbon build up on your valves, we see this all the time where i work

 

[Redsson6669]

Is there an additive I can use to clean valves? Plz don’t say valve job, car runs great unless I punch it.

 

[Ultrascott]

Is there an additive I can use to clean valves? Plz don’t say valve job, car runs great unless I punch it.

We usually perform a top engine cleaner service,sometimes 2-3 times just depends on how bad they are. Find a shop that has the top engine cleaner equipment from like bg or similar. We use Gm top engine cleaner and works well.

 

[Ultrascott]

 

[Redsson6669]

We usually perform a top engine cleaner service,sometimes 2-3 times just depends on how bad they are. Find a shop that has the top engine cleaner equipment from like bg or similar. We use Gm top engine cleaner and works well.

Thx

 

[Redsson6669]

View attachment 19330

One more question, when I looked this up on Amazon, it said not compatible with your vehicle. Could that be because it said 6 and 8 cyl, and I have a 4? And is it safe for the turbo injected engine?

 

[Ultrascott]

One more question, when I looked this up on Amazon, it said not compatible with your vehicle. Could that be because it said 6 and 8 cyl, and I have a 4? And is it safe for the turbo injected engine?

It will work. That’s an Amazon thing. We use it every day on everything except diesels.just for reference, I’m an ase master tech,General Motors master tech and Gm world class.

 

[Ultrascott]

 

[Redsson6669]

It will work. That’s an Amazon thing. We use it every day on everything except diesels.just for reference, I’m an ase master tech,General Motors master tech and Gm world class.

Ok thx

 

[Colt Hero]

@Ultrascott , @Redsson6669 : could you please update your Vehicle Details (using the instructions in the attached thread below)?

And "Scotty" ... you should include your "ASE Master Tech" designation. We really appreciate your expertise here!

https://www.terrainforum.net/threads/vehicle-details-add-them-and-connect-with-forum-members-much-better.32118/#post-326784

 

[Ultrascott]

@Ultrascott , @Redsson6669 : could you please update your Vehicle Details (using the instructions in the attached thread below)?

And "Scotty" ... you should include your "ASE Master Tech" designation. We really appreciate your expertise here!

https://www.terrainforum.net/threads/vehicle-details-add-them-and-connect-with-forum-members-much-better.32118/#post-326784

i've added my vehicle and my certifications. i add the world class because it's as high of training as you can go with general motors,above master status

 

[Colt Hero]

i've added my vehicle and my certifications. i add the world class because it's as high of training as you can go with general motors,above master status

Thanks for the quick turnaround ... and welcome to the Forum!

 

[alexbreak]

Yup! I've seen that before. Just got home from work tonight and my next door neighbor was in his driveway with the hood open ... same problem ... but with a 2003 Ford Taurus sedan (160k miles). I read his OBD port and, sure enough, Misfire on Cylinder #2 (plus 3 other Codes ... one of which was his O2 Sensor ... can't recall the other two, but he took pictures). He said he was having the flashing CEL whenever he punched the gas. At Idle, in the driveway, it sounded fine ... but when he started steadily pushing down on the Accelerator, you could hear some light "skipping" or "choppiness" with the Engine's firing. We quickly pulled his three front plugs (#4, #5, and #6) and found they were wet with oil ... so I think he might have a bigger problem ... like oil getting past his Rings, soaking the Plugs.

But for you, with a much younger 2019 Terrain ... and no history of that kind of thing found License Plate Lookup | License Plate Search online ... maybe just read your OBD-2 port and see if you've got a P301-P304 Code for a mis-firing Plug. That might be all it is. If you don't have a Code Reader, your local chain Auto Parts Store will usually do it for free (O'Reilly's, AutoZone, Advance Auto).

I've experienced this problem with my old Ford