Question about Chevrolet Tahoe

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My 97 Tahoe had to be taken apart to fix a vacuum leak. I took off the intake manifold which required removing the distributor. Everything went back together fine and the vacuum leak is cured. Now I have code p1345 even though the car runs great. What should I be looking for?

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  • dafelton Oct 06, 2010

    I kinda suspected what you said but it's n ice to get some reinforcement. Thanks for the timely response.

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  • Chevrolet Master
  • 15,478 Answers

The crank shaft sensor is sending a signal that something is wrong. Could be when you removed the distributor. Make sure that the sensor is connected and that it is installed properly. Then you have to make sure that the distributor is installed correctly and the timing is correct. It may be running fine now because the computer is compensating for the error.

Posted on Oct 06, 2010

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1 Answer

After replacing my intake manifold and carburetor my engine wont start, only sometimes but it would sound ugly and run very roughly at 400 rpm. PLEASE HELP


You have leaks in your gaskets. or vacuum lines removed and not replaced or broken in the operation. trace air leaks with propane torch unlit. where engine speed increases, you have an air or vacuum leak.

Mar 09, 2015 | Cars & Trucks

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97 f150 4.6l code 1506 high idle replaced gaskets & still has high idle. lower intake manifold leaking?


Check PCV System for vacuum leaks
Smoke Test all your work-intake,etc
Test & Smoke the Evap System for leaks

Mar 04, 2014 | 1997 Ford F150 Regular Cab

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97 chevy tahoe runs rough with a shake


A high idle is common with a vacuum leak. Ive done plenty of chevy intake manifold gaskets due to the gasket failing.

Jan 21, 2014 | 1997 Chevrolet Tahoe

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I need to see a coolant system hose that leaks does the intake have to be removed


Yes there are cooling system hoses under the intake, here are instructions to remove the intake.

Instructions
  1. Remove the Intake Manifold
    • 1Drain the cooling system and relieve the pressure in the fuel system. Disconnect the negative battery cable, the air intake duct, the IAC valve connectors, the throttle position sensor and switch connectors, and the EGR solenoid valve.
    • 2Pull the EVAP canister vacuum and purge hoses, the vacuum hoses from the EVAP, the brake cylinder, pressure regulator and EGR tube. Tag and disconnect the spark plug wires. Remove the distributor cap.
    • 3. Take out the three left bank injector connectors, the thermal transmitter, the ground harness, breather pipe and the upper manifold. Disconnect the fuel feed and return lines and plug them with golf tees to prevent fuel spillage.
    • 4Locate the right injector harness connectors and disconnect them as well as the fuel rail and injectors. Remove the coolant temperature switch harness connector and the water hose from the thermostat.
    • 5Loose the bolts on the lower manifold in sequence. Remove the bolts and left the intake manifold from the engine. Remove the gasket and discard it.
    • 6Clean the mating surfaces by scraping the old gasket material and carbon deposits. Clean the surfaces with solvent and inspect them for damage.
    Install the Intake Manifold
    • 7Put a new gasket in place and install the lower intake manifold to the engine. Tighten the bolts in sequence as follows: first pass-35 inch pounds; second pass-78 inch pounds and third pass 70 to 84 inch pounds.
    • 8Connect the ECT sensor connector, the fuel supply manifold and the right bank injector connectors. Connect the fuel lines and then install the upper intake manifold. Put the breather pipe in position.
    • 9Install the intake manifold ground cable, the thermal transmitter, the left bank injector connectors and the distributor. Reconnect the spark plug wires.
    • 10Continue reconnecting all the components, reversing the order in which they were removed. Connect the negative battery cable to the terminal. Refill the cooling system with the appropriate coolant.
    • 11Start the engine. Check for fuel or vacuum leaks.

Jul 02, 2012 | 1997 Mercury Villager

1 Answer

I have a 97 chevy tahoe 5.7 i just did a intake gasket due to the one given out truck ran fine befor i took it a part but now it runs and throws the p0300 code has a slight rough idle


P0300 random misfire, slight rough idle good , by the way your repair is good you dont want a identified misfire, Lets start by what it is not. Not a misposition sparkplug wire you would of gotten that cylinder code, as misfire, Oh try this got carburator cleaner? spray safely along the intake gasket, How about inspecting the vacuum hoses especailly at the map sensor. Here the thing you got. a vacuun leak. on a 5.7 a vacuum leak causes random misfire, by definition P0300 means 2 cylinders or more. By experience its a vacuum leak

Apr 25, 2011 | 1997 Chevrolet Tahoe

1 Answer

Took to inspection code p0171


engine running lean. Usually caused by vacuum leak. If you have a V engine, the failure is usually intake manifold gaskets. If you have inline (4-cylinder), the cause may be intake gaskets or bad or unhooked vacuum hoses attached to the intake manifold. Check all vacuum hoses for cracks or loose connections. Replace any suspect hose. To find manifold gasket leaks, spray ether or carb cleaner on the gaskets with the engine running. If the engine revs at all, you have a leaky gasket and must remove the manifold to replace. Please let me know if you have any more questions.

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1 Answer

Cylinder #2 Misfire-after intake manifold replaced


It's possible he has two plug wires crossed, or pulled a spak plug wire apart replace #2 spark plug wire First. To test check the firing order and make sure all the wires on the right plugs and the correct place on the distributor, if it is right, then buy a can of carburator cleaner and spray around the intake gasket if the engine revs up when you spray the carb cleaner around the intake manifold with (engine running) if the engine rpm revs up you have an intake leak.

Jul 03, 2009 | 1997 Chevrolet Tahoe

3 Answers

Lower intake manifold gasket leaking 02 Olds Silhouette


This is basicly a very time consuming job rather than a physically hard one to complete. In order to replace the gasket you must remove the intake plenum,throttle body, and misc. vacuum hoses. The wiring harness connections must also be disconnected. Finally the intake manifold is exposed. The bolts holding the manifold to the block are removed exposing the leaking gasket. After removing the push rods and placing them in the correct order to be replaced the gasket and sealants can be removed. Finally replace everything in reverse order. Be sure to consult a GM manual for correct bolt torch specs. The correct specs for the manifold bolts usually come with the gasket. Make sure to change your oil a few times after this job in case any coolant entered the block. Also,change the thermostat and the oil seal on the distributor half shaft cap while you have everything off. Good Luck

Mar 17, 2009 | 2002 Oldsmobile Silhouette

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