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Ask Tims Auto Repair Your Own Question
Tims Auto Repair
Tims Auto Repair, GMC Mechanic
Category: GMC
Satisfied Customers: 15465
Experience:  have owned a repair shop for 25 years
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Ihave1995gmcstalls

Customer Question

ihave1995gmcstalls
Submitted: 1 year ago.
Category: GMC
Expert:  Toolhut replied 1 year ago.

Hi, My Name is***** have over 20 years experience repairing vehicles. I am a ASE Certified Master Auto Technician. I am confident we can resolve your problem together.Please remember I don't know your skill level. I can't see, smell, hear, or touch the vehicle. It may take a few back and forth replies to get to a satisfactory resolution.I also try to give all of the information you may need expecting a positive rating. If there is any reason I cannot get a positive rating please let me know.

When does it stall?

Do you have a security light?

Do you have test equipment?

Customer: replied 1 year ago.
WHEN I IDLE AROUND AT 10 15 KM.PER HR. AFTER ABIT IT STARTS TO SURGE UP DOWN IF ITAKE MY FOOT OFF THE GAS IT WILL STALL ONLY AT THAT LOW SPEED
Expert:  Toolhut replied 1 year ago.

Do you have a scanner? Is this a Jimmy?

Customer: replied 1 year ago.
NO NOT A JIMMY APICKUP
Expert:  Toolhut replied 1 year ago.

Do you have a scanner?

Customer: replied 1 year ago.
NO I DON:T HAVE A SCANNER
Expert:  Toolhut replied 1 year ago.

Do you have a fuel pressure gauge? test light?

Customer: replied 1 year ago.
I HAVE TESTLIGHT FUELPRESSURE GAUGE NOT SURE WHERE TO HOOK UP PRESURE GAUGE ON 5.7
Expert:  Toolhut replied 1 year ago.

The 5.7 fuel pressure gauge goes where the fuel filter goes. You remove filter and it has hoses to hook up to lines.

Lets look at something else first though. Make sure your under dash connector is 12 pins first. If its not 12 pins dont do this.

Can you cross the top 2 pins on your DLC connector. Turn key on and count the check engine light flashes. It should flash 1 and 2 flashes 3 times and then flash any codes.

Also when is the last time you changed the fuel filter?

Customer: replied 1 year ago.
FUEL FILTER WAS CHANGED I WILL CHECK DLC
Customer: replied 1 year ago.
DLC HAS ONLY 6 PINS IFORGOT TO TELL YOU WHEN COLD CRANKS OVER FOR ALONG TIME BEFORE STARTING WARM SEEMS OK IF ILEAVE KEY ON UNTILL PUMP STOPS PUMP PEDEL 4 5 TIMES STARTS GOOD
Expert:  Toolhut replied 1 year ago.

My immediate suspicion is the fuel pump

Customer: replied 1 year ago.
I HAVE TO GET TO A SHOP WITH A SCANNER SO THANKS FOR TRYING IDON>T THINK FUEL PUMP AS IT HAPPENSVERY LITTLE THANKS *****
Expert:  Toolhut replied 1 year ago.

All of your symptoms point to a fuel pump. I would check fuel pressure

Customer: replied 1 year ago.
I can"t rate you good or bad until iknow what the problem is need to get to a scanner
Expert:  Toolhut replied 1 year ago.

I would check fuel pressure. Make sure it holds the pressure

Customer: replied 1 year ago.
had fuel pump checked allgood holds pressure
Expert:  Toolhut replied 1 year ago.

What is the pressure?

Customer: replied 1 year ago.
don:t know wht pressure was they said it wasgood must have been within range
Expert:  Toolhut replied 1 year ago.

There are a few things to look for:

1. You could have egr valve slightly open

2. Vacuum leak

3. Tps sensor fault.

Customer: replied 1 year ago.
changed tps checked egr checked vacume at shop no codes showed up iwill live with it until something happens then I will deal with it so you and I are done
Expert:  Toolhut replied 1 year ago.

I am still suspicious of fuel pump. I dont know how you had it checked

Customer: replied 1 year ago.
I TOLD YOU I HAD IT CHECKED ON AUG25 I WAS CHARGED 48.00 FOR WHAT? I STILL DON"T HAVE A ANSWER ON SEPT 3 I TOLD YOU THAT NOT HAPPY AT ALL
Expert:  Toolhut replied 1 year ago.

there are several symptoms of a fuel pump. You can have low pressure, low volume and not holding pressure once built. Checking pressure is only part of the test. did you check the regulator is working when checking pressure? Like I said I dont know how you checked and am trying to assist you. Checking and saying it is good is very vague. I need more information

Expert:  Toolhut replied 1 year ago.

I would not want you not happy. So I am going to opt out and see if someone else can assist.

Customer: replied 1 year ago.
I TOLD YOU THE SHOP CHECKED IT ITOLD YOU AFEW THINGS DO YOU NOT GET ALL MY REPLYS
Expert:  Tims Auto Repair replied 1 year ago.

Hi, My name is ***** ***** for the delay.

I will do my best to assist you

does the truck run well out on the road?

Expert:  Tims Auto Repair replied 1 year ago.

at wide open throttle does the truck pull well?

Customer: replied 1 year ago.
Expert:  Tims Auto Repair replied 1 year ago.

ok..lets try something,,remove the vacuum line from the egr valve and plug it with a scew or something,,then drive it,,,did that fix the idle problem?

Expert:  Tims Auto Repair replied 1 year ago.

i dont think the problem is the fuel pump sense it does run well out on the road