2020 Ford F350 7.3

[WagginTail]

Wife bought a truck about a month ago. 64,000 miles. Was wondering if anyone is familiar with the issue it's having. Almost everytime now when we start it, it takes 4-5 seconds to start. She also said the other day it seemed to sputter while pulling into the parking lot at her work (low speed and rpms) while pushing the gas pedal. The research I have done is leading me to replace the fuel pump in the gas tank. Has anyone had this issue and can verify its a fuel pump problem? Thanks. Bad pictures attached but it's all I have

 

[Admin]

 

[WagginTail]

A little more info on the truck. 2020 F350 Lariat 7.3L. It has an RDS lift kit on it with 35x12.50x20 Nitto Ridge Grapplers and fox shocks. Agricover Lomax bed cover that I'm not sure I like. It does look good though. Amp Research power steps. It was a custom ordered truck that has vinyl floors which I prefer over carpet. Does not have the tailgate step which I wish it had. Only thing I have added is some rain guards and husky floor mats.

Anyone know how I can find out what size lift kit this is on here?

So far I like how the truck rides. I did pull our camper with it, a 30' Forest River work and play. I was impressed with the power of the 7.3 matched with the 10 speed transmission while towing. And it was getting right at 12mpg while towing which I thought was good.

 

[Hello_Darkness]

Does it seem to do it more when it's hot?

 

[WagginTail]

Does it seem to do it more when it's hot?

I'm keeping track of that. So far yes. I was reading where a lot of people said their trucks do act up more when it's hot

 

[Hello_Darkness]

I'm keeping track of that. So far yes. I was reading where a lot of people said their trucks do act up more when it's hot

That's what I came up with as well, so guys have said Evap stuff seems to be a problem

 

[WagginTail]

That's what I came up with as well, so guys have said Evap stuff seems to be a problem

I did read about one guy had to replace gas cap and fill hose. I was finding more about the fuel pump. Something about a check valve in there going bad causing the fuel system to lose prime. From now on every time I start it I'm going to turn the key to on and wait for 10-15 seconds for the fuel pump to prime up and see if the issue still occurs

 

[WagginTail]

That's what I came up with as well, so guys have said Evap stuff seems to be a problem

I forgot to mention that it's not showing any codes. I read the evap stuff will show a code and that the fuel pump issue will not. I put some sea foam in the gas tank last time I filled it up.

 

[DG Rider]

Man...I did something to a 7.3 that was sputtering and really hesitating a while back and I can't remember what it was.

 

[DG Rider]

Ok...IIRC it was two things: the purge valve was sticking open/on (common) which will cause a system rich code if it's bad enough.

The other...was a brake switch that was bad. Truck was thinking you were trying to do burnouts all the time and would really cut power and refuse to shift and other weird s***.

Also sets a code, so I doubt these are your issues.

 

[WagginTail]

Ok...IIRC it was two things: the purge valve was sticking open/on (common) which will cause a system rich code if it's bad enough.

The other...was a brake switch that was bad. Truck was thinking you were trying to do burnouts all the time and would really cut power and refuse to shift and other weird s***.

Also sets a code, so I doubt these are your issues.

Thanks but doubt that's it. Really wish it would show a code to maybe make things easier to figure out

 

[906UP]

Try cycling the key on-off a couple times before starting it. Example.... key on, wait 5 secs, key off, wait 2-3 secs, repeat a couple times then see if if starts easier. If it does then it's most likely a low fuel pressure/supply problem...... the pump.

 

[NewHere2]

Cam phaser ??

 

[WagginTail]

Try cycling the key on-off a couple times before starting it. Example.... key on, wait 5 secs, key off, wait 2-3 secs, repeat a couple times then see if if starts easier. If it does then it's most likely a low fuel pressure/supply problem...... the pump.

I will try that. Thanks

 

[WagginTail]

Cam phaser ??

Pretty sure the 7.3 doesn't have those

 

[ToddACimer]

My 2020 7.3 does this too. It's especially bad if the outside temp is hot and the engine is hot. I notice it'll be worse after it's sat for an hour or 2. It's never not started and I've never needed to push to start more than once. If I remote start it, I dont notice it.

It kinda drives me nuts but the only thing I've seen is replace the fuel pump and I don't know if that's worth it. I haven't noticed it now that the temp dropped

 

[DG Rider]

Thanks but doubt that's it. Really wish it would show a code to maybe make things easier to figure out

Like I said...doubt that's your issue.

Do you have access to a scan tool or app to read data stream? Some of the ones that use your phone and Bluetooth dongle can be pretty cheap. I'd be interested to see what the fuel trims are.

 

[WagginTail]

Like I said...doubt that's your issue.

Do you have access to a scan tool or app to read data stream? Some of the ones that use your phone and Bluetooth dongle can be pretty cheap. I'd be interested to see what the fuel trims are.

So my dad is a mechanic where I work. We have a fleet of all Fords but no 7.3 engines so he is not familiar with this issue. They use the Ford program on their laptop and I'm sure he could look at the fuel info on there. He's not a certified Ford mechanic so some of the more technical stuff he may not be familiar with. Any tips on what exactly we should look for with his computer hooked up to the truck?

 

[WagginTail]

My 2020 7.3 does this too. It's especially bad if the outside temp is hot and the engine is hot. I notice it'll be worse after it's sat for an hour or 2. It's never not started and I've never needed to push to start more than once. If I remote start it, I dont notice it.

It kinda drives me nuts but the only thing I've seen is replace the fuel pump and I don't know if that's worth it. I haven't noticed it now that the temp dropped

It doesn't bother me that much either but my wife definitely doesn't like it. And if it's gonna sputter and hesitate while she's driving I really can't be having it do that. Especially since she works 45 minutes from home and sometimes I'm hours away for my job. I'm definitely leaning towards the fuel pump though. Doesn't seem like it's very difficult to replace but don't want to throw a part at it and then it doesn't solve the issue.

 

[DG Rider]

So my dad is a mechanic where I work. We have a fleet of all Fords but no 7.3 engines so he is not familiar with this issue. They use the Ford program on their laptop and I'm sure he could look at the fuel info on there. He's not a certified Ford mechanic so some of the more technical stuff he may not be familiar with. Any tips on what exactly we should look for with his computer hooked up to the truck?

Look at long and short term fuel trims. This is the software compensation for what the O2/air fuel sensors are reading in the exhaust. Big negative numbers...say -15% or more (depends on a lot of factors) mean the engine Is getting excessive fuel and the engine management is shortening injector pulse to lean it out- IE Too rich. Leaky evap purge valve, leaky injector, fuel contaminated oil...lots of things can cause this.

Positive numbers mean the opposite. Air leaks, low fuel pressure, etc.

Also watch the MAF sensor. A very vague general rule is that the MAF sensor, warm, at idle, should be approximately the engine displacement in grams per second. A dirty or defective MAF can screw everything up.

Don't think it's a thing with Ford's, but some flex fuel GM's get confused with alcohol content levels being way high and resetting it corrects drivability issues. Updated software cures it.

And while we're on that subject, if he has access to alldata or Mitchell or others, check for technical service bulletins on this issue.

 

[WagginTail]

Look at long and short term fuel trims. This is the software compensation for what the O2/air fuel sensors are reading in the exhaust. Big negative numbers...say -15% or more (depends on a lot of factors) mean the engine Is getting excessive fuel and the engine management is shortening injector pulse to lean it out- IE Too rich. Leaky evap purge valve, leaky injector, fuel contaminated oil...lots of things can cause this.

Positive numbers mean the opposite. Air leaks, low fuel pressure, etc.

Also watch the MAF sensor. A very vague general rule is that the MAF sensor, warm, at idle, should be approximately the engine displacement in grams per second. A dirty or defective MAF can screw everything up.

Don't think it's a thing with Ford's, but some flex fuel GM's get confused with alcohol content levels being way high and resetting it corrects drivability issues. Updated software cures it.

And while we're on that subject, if he has access to alldata or Mitchell or others, check for technical service bulletins on this issue.

Thanks! He has looked at the service bulletins and there is none regarding this. I will show him this and see if it's something he can check. I'm pretty sure he can