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Engine stalls while driving

Tiny
ANGELIQUE22
  • MEMBER
  • 1995 CHEVROLET TAHOE
  • V8
  • 4WD
  • AUTOMATIC
  • 17,700 MILES
Hello. My 1995 Chevy Tahoe keeps cutting out on me while I am driving. By cutting out I mean losing power it seems like. Sometimes when I am pulling out of my drive way or what ever it may be it doesn't seem it wants to go. My husband put new spark plugs, wires, cap, and a roter on it hoping it would fix the problem. It didn't it seems like it is getting worse. When I go to start it, its starts just fine no problems, when is sitting there idoling, it will seem like it wants to die a few times. Could you give us some ideas on what this problem could be?
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Monday, February 16th, 2009 AT 12:52 PM

23 Replies

Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Hello, can you check fuel pressure? Are there any codes?


https://www.2carpros.com/forum/automotive_pictures/170934_aldl_6.jpg



If the datalink connector looks like the picture, you can use a jumper between terminals A & B, then turn the key on, just till the dash lites come on, no further, The cel starts flashing, you count the flashes to get the codes. There may not be any codes.

This guide can help us

https://www.2carpros.com/articles/engine-stalls

and

https://www.2carpros.com/articles/buick-cadillac-chevy-gmc-oldsmobile-pontiac-gm-1983-1995-obd1-code-definitions-and-retrieval-method

Please run down these guides and report back.
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Monday, February 16th, 2009 AT 2:25 PM
Tiny
MOOKMIKEY
  • MEMBER
  • 4 POSTS
  • 1995 CHEVROLET TAHOE
Engine Mechanical problem
1995 Chevy Tahoe V8 Four Wheel Drive Automatic

my 95 tahoe starts up runs for a second then dies has new fuel pump new ign module new fuel filter new plugs new cap and rotor what could this be
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Thursday, June 25th, 2020 AT 7:21 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Hi there mookmikey and TY for the donation this is what keeps the site going.

Check the fuel pressure if its within specs if okay test the fuel pump relay and the fuel pump/oil pressure sending unit-


https://www.2carpros.com/forum/automotive_pictures/12900_oil_sending_unit_and_fuel_pump_circuit_98.gif

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Thursday, June 25th, 2020 AT 7:21 PM (Merged)
Tiny
MOOKMIKEY
  • MEMBER
  • 4 POSTS
I checked relay it was good and has good fuel pressure I was thinking the oil pressure switch but inside my truck shows good oil pressure could that still be the issue
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Thursday, June 25th, 2020 AT 7:21 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Won't hurt to check it-Or do this find the fuel pump test connector and power it this will constantly operate the fuel pump

BTW what was the fuel pressure reading?

The fuel system primes up for 2secs then the fuel pump relay deenergized while the engine is being crank over oil pressure above 4lbs will close the Fp/Oil pressure switch and then it powers the fuel pump
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Thursday, June 25th, 2020 AT 7:21 PM (Merged)
Tiny
MOOKMIKEY
  • MEMBER
  • 4 POSTS
I dont remeber the fuel pressure but had someone come out to check it and they said it was good and that diagram you sent is that the pre obd2 connector in the truck it looks the same and is that were I can test the fuel pump
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Thursday, June 25th, 2020 AT 7:21 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
The fuel pump test connector is located on left rear of engine compartment see C8 for location


https://www.2carpros.com/forum/automotive_pictures/12900_fp_test_connector_1.jpg

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Thursday, June 25th, 2020 AT 7:21 PM (Merged)
Tiny
RODNEY071
  • MEMBER
  • 1 POST
  • 1995 CHEVROLET TAHOE
  • V8
  • 4WD
  • AUTOMATIC
  • 250,000 MILES
My tahoe will not start unless I hold the gas pedal down when I try to start it.I have replaced fuel filter and fuel pump relay. But when it starts sometimes it will not stay running unless you keep up the rpms up high then it sometimes levels out and runs.
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Thursday, June 25th, 2020 AT 7:21 PM (Merged)
Tiny
PARA DRIVER
  • MEMBER
  • 1 POST
I've been thru this twice, both times it was the temp sensor and ran pig-rich. It's located between #6 and #8 cylinders. Look for burned or shorted wires, or replace the sensor. You may have to drain coolant before replacing.
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Thursday, June 25th, 2020 AT 7:21 PM (Merged)
Tiny
MOOKMIKEY
  • MEMBER
  • 4 POSTS
I will test tonight and reply again tommorow thank you
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Thursday, June 25th, 2020 AT 7:21 PM (Merged)
Tiny
HINTONJR
  • MEMBER
  • 1 POST
I also have a 95 Tahoe with similar characteristics that it will only start after I have held the pedal down for a while. The plugs were black which indicated inadequate fire. Like others, I change the plugs, distributor cap, and roter before I read this response about the temp sensor. I changed the temperature sensor and it runs fine. (Mine is located on the front of the intake manifold near the radiator hose mount)

Thanks again.
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Thursday, June 25th, 2020 AT 7:21 PM (Merged)
Tiny
JONRIVERA
  • MEMBER
  • 2 POSTS
  • 1995 CHEVROLET TAHOE
  • 145,000 MILES
When engine is runninig in idle & parked I turn on a/c. Engine runs rough and stalls out.
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Thursday, June 25th, 2020 AT 7:21 PM (Merged)
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Maybe faulty Idle Air Control
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Thursday, June 25th, 2020 AT 7:21 PM (Merged)
Tiny
JONRIVERA
  • MEMBER
  • 2 POSTS
I replaced the iac & egr valve.
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Thursday, June 25th, 2020 AT 7:21 PM (Merged)
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Unplug IAC does it stall? Have checked for codes?
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Thursday, June 25th, 2020 AT 7:21 PM (Merged)
Tiny
JVMARQUEZ
  • MEMBER
  • 1 POST
  • 1995 CHEVROLET TAHOE
  • V8
  • 4WD
  • AUTOMATIC
  • 127,000 MILES
The engine on this vehicle runs great as long as the battery is in good condition. The alternator is brand new but, if the battery is going bad, like losing voltage or a battery cable comes lose or comes off I lose all power copletely and the engine stalls. Why is this? I was under the impression that once a vehicle's engine is running and or on, the engine's power runs on the vehicles alternator. But that's not the case with this particuar vehicle. Is this the way this SUV was engineered? Or do I have some kind of electrical problem
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Thursday, June 25th, 2020 AT 7:22 PM (Merged)
Tiny
BLUELIGHTNIN6
  • MECHANIC
  • 16,542 POSTS
That is hardly the case anymore. That is true back in older days, but with all of the electronic components and computers on board, running with only the alternator could create large voltage spikes and burn out these components. Engineers figured that out and quickly added safety features to prevent that from happening, so normally on 90s and up vehicles if the battery dies even with a brand new alternator, the engine will stall out.
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Thursday, June 25th, 2020 AT 7:22 PM (Merged)
Tiny
DARK CLOUD
  • MEMBER
  • 2 POSTS
  • 1995 CHEVROLET TAHOE
  • V8
  • 4WD
  • AUTOMATIC
  • 144,000 MILES
I have a 95 tahoe that when driving down the road it starts to hesitate and make poping noises under the hood. It only does this while driving, it runs great at and idel and in neutral. What could it be, I have changed the fuel filter and airfilter, is it my map sensor?
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Thursday, June 25th, 2020 AT 7:22 PM (Merged)
Tiny
PEAR69
  • MECHANIC
  • 1,482 POSTS
Is the chech engine light on?
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Thursday, June 25th, 2020 AT 7:22 PM (Merged)
Tiny
DARK CLOUD
  • MEMBER
  • 2 POSTS
NO the check engine light is not on, and I have even hooked up a OBD to the vehicle and it reads no codes. When it starts to hesitate and stall if you let up on the throttle and then mash it it will run better, or shift the trany down to a lower gear where it makes the RPM's go up it will stop the hesitation until it shifts up and then it starts all over again.
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Thursday, June 25th, 2020 AT 7:22 PM (Merged)

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