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Check engine light on

Tiny
JACOBANDNICKOLAS
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Hi,

No problem, Carl. We need to get this figured out one way or another. LOL I look forward to hearing what you find.

Take care,

Joe
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Wednesday, April 13th, 2022 AT 6:29 PM
Tiny
CARL DEKKER
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Hey Joe, I don’t have a live scan tool however the scan tool that I’m using the freeze frame shows the MAP sensor at 86K PA which I’m converting to 12.87 PSI.
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Saturday, April 23rd, 2022 AT 6:17 PM
Tiny
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Also, just as our information I did replace both MAP sensors and mass airflow sensors.
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Saturday, April 23rd, 2022 AT 6:20 PM
Tiny
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Hi,

With the engine running, the reading on the scanner should be approximately 8 to 9 inHg which is approximately 4 PSI. I'm questioning if the sensors you got are good.

Take a look at the attachment. It indicates the normal range of 20 to 48 kPa based on altitude. That works out to 2.9 PSI to 6.9 psi. You are double that.

Let me know.

Joe

See pic below.
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Saturday, April 23rd, 2022 AT 8:59 PM
Tiny
CARL DEKKER
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Okay, I will check it out. After clearing the codes yesterday, I have now driven the vehicle forty miles and I have not gotten the light on. It makes no sense I would imagine it'll come on sooner or later.
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Sunday, April 24th, 2022 AT 7:36 AM
Tiny
JACOBANDNICKOLAS
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Hi,

Do me a favor. If your scanner has a setting to check emission readiness, see if there are any circuits that are not complete. This just may lead us in the direction of the issue.

Let me know.

Joe
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Sunday, April 24th, 2022 AT 6:47 PM
Tiny
CARL DEKKER
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I went to O’Reilly†s auto parts and borrowed their fuel pressure test kit. I think we may have found the problem. Let me run this by you. I applied the pressure gauge and key on engine off the pressure went to 60 PSI and then immediately fell down to 40 once I started the engine the fuel pressure went up to about 52 and then fell down to 42 and I could not get it the fuel pressure above 42. I put a load on the motor, and I tried to snap throttle I could not get it above 42 PSI. What do you think? I am thinking it's a bad fuel pump, however I will not sure how to test the fuel pressure regulator.
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Tuesday, May 3rd, 2022 AT 1:23 PM
Tiny
JACOBANDNICKOLAS
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Hi,

I suspect you are correct. However, even a partially plugged fuel filter can cause the issue. Also, there is a fuel flow control module mounted above the spare tire. Basically, this module is what controls fuel pressure by changing the voltage to the pump based on need.

I attached a description below along with a test you can perform to confirm if it is good or not. However, this should have set a diagnostic trouble code.

Take a look through the pics below and let me know if you have questions.

Take care,

Joe

See pics below.
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Tuesday, May 3rd, 2022 AT 5:49 PM
Tiny
CARL DEKKER
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Weeks ago, I tried to buy a fuel filter for the truck, but I was told it was in the fuel tank along with the fuel pump, so I am assuming it’s all one unit. If I’d go the route and replace the fuel pump, do you have a brand you would recommend because I see online fuel pump cost range from $100.00 to $500.00.
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Tuesday, May 3rd, 2022 AT 6:04 PM
Tiny
CARL DEKKER
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I also assume that you would not believe it to be the pressure fuel pressure regulator, but the pump or fuel filter. Is that correct?
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Tuesday, May 3rd, 2022 AT 6:06 PM
Tiny
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Hi,

As far as a brand goes, the OEM AC Delco brand would be the best, but those are likely the $500.00 ones. I checked out rock auto and the most expensive one was $390.00 and they started at under a hundred dollars. You may want to check the site. Delphi, Carter, and Delco are all good.

The one thing I would recommend is to stay away from really inexpensive online private sellers. I have fixed many failed pumps and other electronics that were a bargain. LOL

Regardless, you will need to know the fuel tank size and if the vehicle is designed to run on E-85 fuel. There is a difference. If you already know, tell me so I can get you the directions for replacement.

Let me know if I can help you in any way.

Take care,

Joe
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Tuesday, May 3rd, 2022 AT 6:20 PM
Tiny
CARL DEKKER
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Fuel capacity is 31 1/2 gallons and it is E85 and I replaced the fuel pump approximately five years ago, so I’m familiar with that procedure.
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Tuesday, May 3rd, 2022 AT 8:45 PM
Tiny
JACOBANDNICKOLAS
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Hi,

Okay. I wasn't sure if you needed the directions. However, if you run into trouble, let me know and I'll try my best to help from here.

If you have a chance, let me know if the pump takes care of the issue.

Take care,

Joe
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Wednesday, May 4th, 2022 AT 2:39 PM
Tiny
CARL DEKKER
  • MEMBER
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Hey Joe, I'm back. I ordered a fuel pump from Delphi about $300.00 and I just got it in. I cleared the codes and ran the motor about three hundred miles under 40 miles an hour and the check engine light came on I then put it on the highway and I drove 200 miles at about 60 to 75 miles an hour and the check engine light came on again.
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Thursday, May 26th, 2022 AT 6:46 PM
Tiny
CARL DEKKER
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Drove the car under 40 miles an hour and the check engine light never came on. Once I got on the expressway and went 60 miles an hour then the check engine light came on.
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Thursday, May 26th, 2022 AT 6:49 PM
Tiny
CARL DEKKER
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Drove the car under 40 miles an hour and the check engine light never came on. Once I got on the expressway and went 60 miles an hour then the check engine light came on
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Thursday, May 26th, 2022 AT 6:49 PM
Tiny
CARL DEKKER
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Well now, I drove the car probably 150 Miles and under 40 mph and the check engine light just came off.
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Thursday, May 26th, 2022 AT 6:54 PM
Tiny
JACOBANDNICKOLAS
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Hi,

Is it always the same code and nothing different? With the engine idling the MAP reading should be between 19-42kPa or 2.7 and 6 PSI. Does it fall within the parameters?

Also, do you notice any ticking from the exhaust pre-cat which could indicate a leak?

Let me know.

Joe
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Friday, May 27th, 2022 AT 7:50 PM
Tiny
CARL DEKKER
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  • 26 POSTS
I always get the same two codes the first is p 219a and then the second code is the one that caused the freeze frame, and it is p2200. I have a kPa 8 7 on the manifold pressure sensor. I do not have a live reading but if you recommend a code reader for active live reading I will purchase one.
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Thursday, June 2nd, 2022 AT 7:35 AM
Tiny
JACOBANDNICKOLAS
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Hi,

The MAP sensor isn't reading correctly. It needs to be between 19 and 42 kPa. Have you replaced it?

Joe
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Thursday, June 2nd, 2022 AT 4:27 PM

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