Issues with gas not burning off engine

[elocin106]

I have had my 2014mkz for only 5 years. For the last year it’s been stalling on a warm start when pulling out of parking lots (going very slow) or if I am idling in a drive thru too long. I have had fuel sensors, air sensors, filters etc. replaced. The car still does this. My mechanic said(I have no car knowledge) they noticed build up on my engine where gas is not being burned off which may be the problem. They told me to use more expensive gas bc it’s cleaner but honestly I cannot afford that at this time. Has anyone else heard that they have more build up on their engine than they should? My mechanic thinks it’s weird bc they don’t see this level of build up on cars under 100kmiles. Mine is at 50k/60k. The only solution is to take to a specialist who has the tools to clean the tiny area deep in the engine to get the build up off, but they have to be super careful to not get the gunk into the engine or it will seize it? I don’t know. It sounds ridiculous. 

[bbf2530]

1 hour ago, elocin106 said:

I have had my 2014mkz for only 5 years. For the last year it’s been stalling on a warm start when pulling out of parking lots (going very slow) or if I am idling in a drive thru too long. I have had fuel sensors, air sensors, filters etc. replaced. The car still does this. My mechanic said(I have no car knowledge) they noticed build up on my engine where gas is not being burned off which may be the problem. They told me to use more expensive gas bc it’s cleaner but honestly I cannot afford that at this time. Has anyone else heard that they have more build up on their engine than they should? My mechanic thinks it’s weird bc they don’t see this level of build up on cars under 100kmiles. Mine is at 50k/60k. The only solution is to take to a specialist who has the tools to clean the tiny area deep in the engine to get the build up off, but they have to be super careful to not get the gunk into the engine or it will seize it? I don’t know. It sounds ridiculous. 

 

Hi elocin. Not really sure what type of "buildup", or "more expensive gas" your mechanic is referring to. And did the mechanic tell you there is a build up "on the engine" or "in the engine"?

 

So to start, more precise information may help. What and where exactly is this "buildup" the mechanic is referring to? As far as "more expensive gas". Again, what are you referring to? Using premium instead of regular? Or using name brand versus generic/convenience store fuels? You don't need to use premium fuels, only minimum 87 octane fuel. However, you should use name brand, Top Tier rated fuels, not generic/convenience store fuels.

 

I would recommend you start by purchasing your next few tanks of fuel somewhere else, at a name brand, Top Tier station. And run a bottle of Techron Fuel Injector Cleaner in the next two to three tanks. Do that, then get back to us with the results.

 

Let us know how you make out and good luck.