1995 Chevy Tahoe trouble shoot

Tiny
FALKON
  • MEMBER
  • 1995 CHEVROLET TAHOE
  • V8
  • 4WD
  • AUTOMATIC
  • 95,000 MILES
Tahoe just stopped running while driving down the street. Electrical seems fine. The only way to restart is to completely press gas pedal all the way to the floor and then turn the key. The car starts running very ruff and black smoke pours out of the exhaust pipe. The tohoe also will not idle and only will stay running if play with the gas pedal up and down
Sunday, March 22nd, 2009 AT 10:12 AM

7 Replies

Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Hello, If your still obd1, check for codes, you can do that without a code-reader.

If your tbi are the injectors leaking gas? You should be able to look and see. How is the fuel pressure? A faulty coolant temp sensor can cause some issues?
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Sunday, March 22nd, 2009 AT 11:06 AM
Tiny
FALKON
  • MEMBER
  • 4 POSTS
How do I check codes without a code reader?
When an injector is leaking do I check when I here the pump working or when I am turning the engine over? The fuel pressure is good and the coolant sensor is new
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Sunday, March 22nd, 2009 AT 11:56 AM
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS


http://www.2carpros.com/forum/automotive_pictures/170934_aldl_11.jpg



If the datalink connector looks like the picture, obd1, use a jumper between the A & B terminals. Turn the key to on, no crank. The mil starts flashing, you count the flashes to get the codes. There may be a decal under your hood, that tells you if your obd1 or obd11 compliant? On a TBI system, you can see the injector drip, once you build pressure, cycling the key on and off, should build pressure.
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Sunday, March 22nd, 2009 AT 12:22 PM
Tiny
FALKON
  • MEMBER
  • 4 POSTS
How do I figure out what the code 1-2, 1-2, 1-2, 3-3, 3-3, 3-3-3, 4-5, 4-5, 4-5 means also the injectors are not leaking thanks
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Sunday, March 22nd, 2009 AT 1:01 PM
Tiny
FALKON
  • MEMBER
  • 4 POSTS
When I place the jumper between a-b terminals the service engine light blinks in this pattern 1 flash a pause and them 2 flashes it repeats this sequence 3 times next sequence that repeats 3 times is 3 flashes and pause with anither 3 flashes and the next 3 time repeating sequence is 4 flashes with a pause and another 5 flashes.
My question is what does these flashes represent or wher can I find out what these flashing codes mean
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Sunday, March 22nd, 2009 AT 1:50 PM
Tiny
FALKON
  • MEMBER
  • 4 POSTS
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Sunday, March 22nd, 2009 AT 2:30 PM
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS


http://www.2carpros.com/forum/automotive_pictures/170934_chevy_tahoe_1.jpg




http://www.2carpros.com/forum/automotive_pictures/170934_chevy_tahoe_11_1.jpg



Usually code 12 means, diagnostic mode.
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Sunday, March 22nd, 2009 AT 4:23 PM

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