Question about 1992 Mazda Navajo

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Changed out intake gaskets now the truck runs bad

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Check for a loose or missing vacuum line visually. If nothing found, get a can of carb cleaner and spray all vacuum lines a little at a time in short bursts ( 1 second ) .When the engine races, look at where you just sprayed - you will find either a cracked,broken, or disconnected line.
This procedure takes some time and patience - good luck!

Posted on Nov 06, 2010

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Posted on Jan 02, 2017

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1 Answer

Battery died and replaced but now hard shifting, high idle and will suddenly quit running. Could this be the ECM?


Sounds like the air intake manifold gasket getting bad. Easy way to test this is when it is idling high, take a can of brake cleaner and spray it on the air intake, all around the gasket. If the gasket is bad, the car will change it's idle as the cleaner is sprayed on it. This happened to both of my 02 saturns. The air intake manifold gasket is located on the back side on the top of the motor. Very easy to get at and a very easy test. To locate it , look for the throttle cable on the throttle body. Look to the left of that and you will see the air intake. It's an aluminum manifold held on by 8 ten mm nuts. Right behind the fuel injectors. You can also use ether or quick start, and it wont take much. If the idle changes, you intake gasket is bad. Let me know how you make out

Apr 21, 2015 | 2002 Saturn Sl

1 Answer

Why is my truck idling and running so ruff? But when I un plug the MAF it runs fine


Vacuum leaks. Check hoses. Also check the intake manifold at the gasket. To check the intake (have the MAF plugged in) Spray some wd40 around the intake at the gasket seal. If the engine starts running fine at some point. Replace the intake manifold gasket.

Mar 06, 2015 | 1999 Chevrolet Silverado 1500

3 Answers

My grand am still overheats even after i changed the termostat and water pump plus, the fan only runs when the temp sensor is unplugged


I had the same problem with my 1999 grand am .I changed water pump, thermostat. I heard the Pontiac engines , 3.4 had overheating problems one is the intake gasket if your losing water but don't know were its going its leaking at the intake gasket and burning off or if you check the oil cap or the dip stick and theres a milky substance on them it would be your head gasket I had to change my head gasket and while I was there I changed the intake gasket too. I haven't had any problems sence I changed them hope this helps. Jack

Jun 11, 2014 | 1997 Pontiac Grand Am

1 Answer

What are the symptoms of a bad intake gasket on a 1999 buick century?


Coolant leaks,When the intake manifold gasket cracks or blows out, coolant will leak out of the intake manifold. You may see puddles underneath your car or notice smoke or steam coming off of the engine and exhaust from the coolant dripping onto it and then burning.Overheating, If the intake manifold gasket fails and allows coolant to leak out into the engine, your car will begin to overheat. If your car frequently runs low on coolant or begins to overheat, check the intake manifold gasket.Running poorly, When the intake manifold gasket falters, it affects the way the motor handles its emission gases. The change in pressure can affect the vacuum in the intake as well as how smoothly your car runs. Mainly, it will idle roughly and may hesitate, cough or sputter.

Oct 27, 2013 | 1999 Buick Century

1 Answer

Need Help, Is it my intake gasket?


it is 100% intake gasket,if you check the coolant reservoir,and there is oil in it,if it was head gasket you had white smoke out of tail pipe and loss of power
you can run run the cylinder compression test,

gm used crappy plastic intake manifold gasket,
unfortunately, it is about 1000$ or so fix

Jul 02, 2012 | 1999 Chevrolet Lumina

1 Answer

The idle goes up and down, and i see a little smoke coming out of tail pip. could it be my idle controler?


could also be a intake gasket. check by spraying carb/choke cleaner around the intake mating surface while engine running and if idle changes rpm then gasket bad

Apr 16, 2011 | 1988 Jeep Cherokee

1 Answer

I got white smoke, changed head and head gasket, intake gasket looked bad. My question is: can a bad intake gasket cause the white smoke?


Not on a Gas engine, but diesel engine yes.

Diesel engine white smoke means leaking head, intake, or your turbo is not working.

Gas engine leaking intake would only cause rough idle, no power, etc,,,,

Apr 15, 2011 | 1999 Daewoo Nubira

2 Answers

Motor races to 2500rpm when idling and stays there


You have a vaccum leak. Check all vaccum hoses and connections for hissing or leaks.

Jan 18, 2010 | 1991 Ford F150

2 Answers

White smoke coming out tailpipe


If your intake gaskets are leaking, when you dump soapy water on the gasket, it should bubble like crazy ( when it's running). If you can, run it with the rad cap off and watch for bubbles. If it keeps bubbling, you probably have a head gasket problem.

May 14, 2009 | 1996 Chevrolet Cavalier

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