I have a 99 Chevy Tahoe 5.7 with starting problems. I have done the following: Replaced right front oxygen sensor, replaced crankshaft sensor, replaced coolant sensor, installed new ac delco rapid fire #12 plugs, done a fuel pressure test with the following results: 58 pounds with key on and 52 pounds with engine running. Each thing I did seemed to help a little, none of the things done were done without a code except replacing all 8 spark plugs ( I was only getting a misfire code on #2 cylinder) Still have to crank quite a while to get it too start cold, once its run a bit it will start up fine. Help???

Question 1

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Where is the oxygen sensor located on a 454 Chevy pickup engine

Anrez, your 1991 Chevy trucks O2 sensor could be located in the Y pipe just ahead of converter or in the front portion of the converter.
Check the attached links,instruction and guides, Good luck
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How to change Oxygen Sensor 1995 Chevy Suburban
How to o2 sensor replacement Chevy Silverado GMC Sierra 88 95 Tahoe Yukon...

Jul 21, 2016 • Cars & Trucks

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My 99 Chevy tahoe 5.7 liter won't start and reads out code P 0339 for the crankshaft position sensor is intermittent.

That's a good starting point. Defective crank sensor can cause a no-start condition as well as possibility of shutting off while driving.

Nov 09, 2015 • Cars & Trucks

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Had the fuel pump and the crankshaft sensor replaced on 2002 chevy tahoe still will not start what could it be now.

Check if there is current on the spark plug, if then check the brain box.

Aug 16, 2011 • 2002 Chevrolet Tahoe

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I have a 2002 chevy tahoe and I just had an oxygen sensor replaced on monday the very next day my check engine light was back on. I had another diagnostic check and the said it was my oxygen sensor. It...

Sound like either the mechanic didn't plug the sensor in all the way or you got a bad sensor, bank 2 should be the passenger side, sensor 2 is the sensor after the catalytic converter.

Mar 17, 2011 • 2002 Chevrolet Tahoe

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Need to replace the crankshaft position sensor

REMOVAL & INSTALLATION

Disconnect the negative battery cable.
Remove the serpentine drive belt from the crankshaft pulley.
Raise and safely support the vehicle.
Remove the right front wheel and tire assembly and the right inner fender access cover/splash shield.
Using a 28mm socket, remove the crankshaft harmonic balancer retaining bolt.
Remove the crankshaft balancer, using a puller if necessary.
For 1992-99 vehicles, remove the CKP sensor shield. Fig. 1: If so equipped, remove the crankshaft position sensor shield
Unplug the sensor electrical connector.
For 1987-91 vehicles, perform the following:
1. Remove the sensor and pedestal from the block face.
2. Remove the sensor from the pedestal.
For 1992-99 vehicles, remove the sensor from the block face. To install:
1. For 1987-91 vehicles, perform the following:
2. Loosely install the crankshaft sensor on the pedestal.
3. Position the sensor, with the pedestal attached, on crankshaft sensor installation tool J 37089 or equivalent.
4. Install the bolt to hold the pedestal to the block face, then tighten to 14-28 ft. lbs. (20-40 Nm). Fig. 2: Position the crankshaft sensor tool on the crankshaft
  Fig. 3: Insert the crankshaft sensor tool into the harmonic balancer
5. Tighten the pedestal pinch bolt to 30-35 inch lbs. (3-4 Nm).
6. Remove the special tool.
7. Place the crankshaft sensor tool on the crankshaft balancer and turn. If any vane on the harmonic balancer touches the tool, replace the balancer.
For 1992-99 vehicles, install the CKP sensor on the block.
1. Install the retaining bolts and tighten to 14-28 ft. lbs. (20-40 Nm).
2. Install the crankshaft position sensor shield.
3. Attach the sensor electrical connector.
Install the balancer on the crankshaft.
Tighten the crankshaft bolt to 200-239 ft. lbs. (270-325 Nm) for 1987-91 vehicles. For 1992-99 vehicles, tighten to 110 ft. lbs. (150 Nm), plus an additional 76°rotation.
Install the inner fender shield and the right tire and wheel assembly.
Carefully lower the vehicle.
Install the serpentine belt.
Connect the negative battery cable.

Oct 29, 2010 • 1999 Oldsmobile 88

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Po138 code on 96 chevy tahoe 5.7l where do i start testing

P0138 is a code for an unexpected high voltage in the post cat o2 sensor on the left side (bank 1 sensor 2). It often is a result of an internal short between the oxygen sensor heater and the actual oxygen sensor. I would clear the core and if it returns replace the sensor.

Oct 06, 2009 • 1996 Chevrolet Tahoe

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1999 chevy tahoe starting problem

i have a 99 5.7 chevy suburban and have to use starting fluid for it to turn on , ive replaced the fuel reg. and fuel pump is 4years old fuel filter 6months old new cam and crank sensor new distrbutor rotor and cap

Jul 30, 2009 • 1998 Chevrolet Tahoe

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Raer a/c works but front blows hot air on my 99 tahoe

I just took my 04 Tahoe in for the same thing and it was the a/c actuator.

Jul 14, 2009 • 2004 Chevrolet Tahoe

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99 chevy tahoe

perform cam lift procedure if is Ok replace collapsed lifter

Jun 17, 2009 • 1998 Chevrolet Tahoe

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3answers

1998 Chevy tahoe Hard to start when cold

replace your MAP sensor(manifold absolute pressure) the map sensor is the computer for your fuel pressure regulator telling how much pressure. Unless your tahoe runs like **** going up hill than it inevitably your fuel pump

Feb 17, 2009 • 1999 Chevrolet C/K 2500

Question 2

Stephen Bulger

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Posted on Sep 29, 2013

Stephen Bulger

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What code(s) were you getting? That being said, is the engine carburated, throttle-body injected, or multi-port injected? Need more info, please.

jallen231 Sep 29, 2013

throttle-body injected, codes for oxygen sensor, cranshaft position sensor, #2 cylinder misfire,

×

Answer 2

Jason Johnson

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Posted on Sep 30, 2013

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I suggest removing and replacing your catalytic converters as they go bad with the pass through design and actually clog the exhaust causing all kinds of havoc to the vehicle. Good luck and best wishes.

Answer 3

raj somaiya

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Posted on Sep 29, 2013

raj somaiya

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To troubleshoot the issue follow the car no-start guide with step by step testing:---
http://www.gresk.com/2012/02/car-starting-issues.html
----------
This will help.
Thanks.

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raj somaiya

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Where is the oxygen sensor located on a 454 Chevy pickup engine

My 99 Chevy tahoe 5.7 liter won't start and reads out code P 0339 for the crankshaft position sensor is intermittent.

Had the fuel pump and the crankshaft sensor replaced on 2002 chevy tahoe still will not start what could it be now.

I have a 2002 chevy tahoe and I just had an oxygen sensor replaced on monday the very next day my check engine light was back on. I had another diagnostic check and the said it was my oxygen sensor. It...

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1996 - 1999 Chevrolet Tahoe Exhaust Muffler Kit 15701 Chev

Where is the oxygen sensor located on a 454 Chevy pickup engine

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raj somaiya

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Related Questions:

Where is the oxygen sensor located on a 454 Chevy pickup engine

My 99 Chevy tahoe 5.7 liter won't start and reads out code P 0339 for the crankshaft position sensor is intermittent.

Had the fuel pump and the crankshaft sensor replaced on 2002 chevy tahoe still will not start what could it be now.

I have a 2002 chevy tahoe and I just had an oxygen sensor replaced on monday the very next day my check engine light was back on. I had another diagnostic check and the said it was my oxygen sensor. It...

Need to replace the crankshaft position sensor

Po138 code on 96 chevy tahoe 5.7l where do i start testing

1999 chevy tahoe starting problem

Raer a/c works but front blows hot air on my 99 tahoe

99 chevy tahoe

1998 Chevy tahoe Hard to start when cold

Not finding what you are looking for?

1996 - 1999 Chevrolet Tahoe Exhaust Muffler Kit 15701 Chev

Where is the oxygen sensor located on a 454 Chevy pickup engine

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