Question about 1998 Chevrolet Tahoe

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I have 1998 Chevy Tahoe 5.7 that i recently changed the intake manifold on while it was open it rained pretty hard. I had a serious problem and couldnt go back and cover it. I know the truck has water inside cause i start it and the oil got chocolate milkish like. What should i do know i tried flushing it like 3 times and gets slightly clearer and know its starting to overheat and oil pressure guage to high, please help me....

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  • Chevrolet Master
  • 874 Answers

Obviously your engine overheats and damages the cylinder head gasket , When mixing engine oil with the coolant, it looks like chocolate.

Posted on Jul 10, 2017

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Posted on Jan 02, 2017

psds4
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SOURCE: 1998 chevy tahoe 5.7 intake manifold removal

http://www.autozone.com/shopping/repairGuide.htm?pageId=0900c1528008effd
this should help

Posted on Oct 23, 2008

  • 140 Answers

SOURCE: 1998 Chevy tahoe Hard to start when cold

Hello, yes the check valve is in the fuel pump assembly. The check valve is leaking and the pump will burn out soon. Unfortunately the aftermarket fuel pumps can be very unreliable. A good portion of problems we see on this site are from people who replace the pump sometimes twice and it still doesn't work.

Posted on Jan 03, 2009

  • 1 Answer

SOURCE: Low Oil Pressure on 1992 Chevy 1500 Pickup Truck

1992 silverado pickup has a problem with the oil pressure Gage on the dash board fluctuate when i put break on or accelerate the gas 

Posted on Feb 14, 2009

  • 74 Answers

SOURCE: 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

Posted on Feb 17, 2009

  • 206 Answers

SOURCE: 2000 Chevy Silverado Z71 hard to start

Pull the vac line off the regulator right after you stop the engine. See if there is gas in the vac line if so the regulator is bad. If no gas is present it could be the check valve in the fuel pump letting the gas pressure leak down. Get a set of gauges and hook up to the fuel lines and check for pressure loss. You will have some loss but should hold steady for several hours. Another thing to try is turn the key on and off several times before trying to start this will charge the lines if this works every time you are losing fuel pressure. If you still have trouble when doing this I would look somewhere else besides the fuel system

Posted on Mar 08, 2009

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you will have to remove upper intake plenum the black plastic part there is a o-ring around the area you are speaking of. now if this engine didn,t have the intake gaskets replaced before installing now would be good time because if you keep vehicle believe me you will have to do sooner or later these engines came with plastic intake gaskets that are notorious for leaking to do this you will njeed to remove both upper and lower intake manifolds I just started a job on 99 tahoe today before lunch and customer is driving tonight replaced upper and lower intake gaskets fel-pro makes updated gaskets for this engine that has thick metal shim and rubber gaskets a great improvement that ends this problem as for your vacuum leak at opening for fuel lines don,t see often but is possible hope this helps

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Ase describe your where is the fuel pressure


If you look at the top of the upper intake manifold plenum with the air intake duct work off you will see 2 shiny fuel tubes that feed into the fuel meter body. The fuel meter body also has an electrical connector right in the middle of it. The pressure regulator is mounted on the side of that body. You'll have to remove the upper intake manifold manifold to replace it. Before you do that, be sure to bleed the pressure off the fuel system.

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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

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