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Gdi legnum won't fire

I changed intake manifold gasket because oil was on the leads and now the check engine light turns on. And once it turns on the car won't start again. changed airflow meter and checked leads and plugs. They're ok

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  • Cars & Trucks Master
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Have the OBD read should give you a code as to what may be the problem, are you sure you have replaced all wiring connecrors ? easy to miss one or not completely push together completely i'm sure you have checked but give it another look concentrating on the wiring connectors

Posted on Mar 29, 2014

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I've got a 2002 Buick LaSabre. Firewall looks melted..car gets hot on short run. I do have small leak brake fluid. Could that be the problem?.


That would not cause the engine to get overheated. It may be too late to save your engine, but check if you have coolant loss and brown sludge on the oil dipstick, or if under the oil fill cap there is a milky brown substance. This is evidence of coolant getting into the oil. This engine in LeSabres has a common problem of intake manifold gasket failure, leading to loss of coolant that winds up in the cylinders and into the oil. If not driven much or if the engine did not get too hot, the cylinder heads and head gaskets may not have been ruined, but if overheated badly, the engine may be a total loss.

The intake on the engine is two parts: an upper intake manifold that is plastic (and just waiting to fail-many owners have had to replace this) and an aluminum lower intake manifold. The gaskets under the lower manifold are the ones that develop leaks. Because GM used inferior factory gaskets (also made of plastic) as a cost-cutting measure. They took a very good engine, well known for durability, and shaved costs with inferior gasket material-go figure.

Dec 06, 2014 | Cars & Trucks

1 Answer

My 2008 Chevy uplander engine light on and the code shows for cam shaft sensor and intake manifold what I do


The intake code means its leaking from the intake,bad gaskets, or a vacuum leak. check for bad gaskets on intake manifold. You can tell by putting a bit of oil around the maifold. if it is leaking the engine will flair up. To check this, External leak-- Coolant seeps through the broken intake manifold gasket to the outside of the engine. If its bad enough you will see coolant dripping from gasket. Coolant seeps through the damaged gasket to the inside of the engine, mixing with motor oil. If you suspect an internal leak, check your oil dipstick. Or if you have a substance under oil filler cap that looks like a milkshake, Oil is mixing with coolant. this means intake gaskets are bad, Now for the camshaft sensor, If you have a manifold leak. this could be giving you a false camshaft reading! Because, If sensor is bad vehicle will not start unless theres a wire problem. Symtoms of a bad sensor are--- engine sputtering, poor acceleration, stalling/inability to start. HopeI helped you out! Good-Day!

Jul 26, 2014 | 2008 Chevrolet Uplander

1 Answer

On a 3500 dulley 4x4 big block chevy gas engine, I have a cylinder 8 misfire and engine light. It also had a mass aire flow indication but that was replaced. only 86000 miles on 03 truck


Check the intake manifold gasket. If it leaks it will draw air into engine and this air bypasses the mass air flow sensor which will cause a rough idle or running symptom from running too lean. If you change the intake manifold gasket you should probably change the valley pan gasket at the same time. A dealer will change both for less than $500 and you might save some more if you dig around on GM Service website and find a coupon discount (Usually 10%-20%). You might save more at a local shop if you trust them and they do this type of work. Getting to the intake manifold gasket also exposes the valley pan and since you are already there it only takes a little more to change that gasket too. Some GM V-8 engines use a little oil between oil changes and if both gaskets are meticulously changed at the same time it will sometimes fix the oil usage. It did for me on my Tahoe (126k miles).

Jun 10, 2014 | 2002 Chevrolet Tahoe

1 Answer

How to fix oil leaks in chevy ss impala 1996



Instructions

1. Removal

Unscrew the bolt that holds the negative connection to the Impala's battery. Set this bolt aside for later use.

Remove the engine cover to access the intake manifold and manifold gasket. Disconnect the throttle body inlet duct from the engine.

Twist off the radiator cap to allow draining of the coolant to flow more smoothly. Place an empty container beneath the radiator's drain plug, and remove this plug. Allow all of the engine coolant to drain into the empty container. Replace the drain plug once you are finished.

Tag all of the electrical wiring and hoses before removing so that reconnection is precise to factory settings. Remove these parts, individually, from the intake manifold.

Loosen the bolts that hold the intake manifold to the Impala's engine block. Lift the intake manifold from the block once all bolts have been completely removed.

Use the flat-head screwdriver to pry the old intake manifold gasket from the engine block. Discard this part once you have removed it.

Clean the engine block thoroughly with the engine degreaser and linen cloth. If necessary, use a gasket scraper to remove excess buildup and grime.

2. Installation

  • Coat the top and bottom of the new intake manifold gasket with a chemical sealer so that it bonds to the engine block securely. Position this new manifold gasket so that it lines up perfectly with the cylinder ports of the Impala's engine block.

Place the old intake manifold on top of the newly-installed manifold gasket until it aligns with all of the holes of the cylinder flanges and manifold gasket.

Attach all of the bolts with your hand to the manifold. Once all bolts have been positioned, use a torque wrench and apply 15 foot-pounds of pressure to the bolts to secure the manifold into place.

Reconnect all of the necessary hoses and electrical wiring to the intake. Pour the engine coolant back into the radiator.

Reattach the engine cover on top of the intake manifold and engine block. Start the Impala's engine and check for any leaks around the new intake manifold gasket.

Jul 08, 2012 | 1996 Chevrolet Impala SS

2 Answers

I have a 02 Chevy tahoe....it sounds like coolant rushing throughout the engine while sitting at an idle and about every 2 or 3 days I gotta add coolant its not much also the low coolant light comes on...


I would perform a coolant pressure test because these engines are known for leaking intake manifold gaskets.Check and see if your oil is starting to turn a creamy tan color.

Jan 24, 2012 | 2002 Chevrolet Tahoe

2 Answers

My oil is a light brown color


This is not good. It means that antifreeze is getting into the oil. This is usually caused by damaged intake manifold gaskets. Replace the lower intake manifold gaskets and change the oil. Run the engine long enough to reach operating temperature and change the oil and filter again. Then cross your fingers and hope that there is no bearing damage. If the engine is knocking, you will have to replace the engine.

Mar 06, 2011 | 1999 Chevrolet Suburban

2 Answers

My 1996 chevy suburban runs rough with no engine lights it has a 350 i just had the intake manifold gasket done


spray carburetor cleaner to the surrounding gaskets of the intake manifold while the engine is running.. If the idle increases upon spraying the cleaner the intake is leaking

Mar 10, 2010 | Chevrolet Suburban 1500 Cars & Trucks

1 Answer

Always low on oil


if it's 5.2 or 5.9 engine,the intake manifold plenum pan gasket may be drawing oil from lifter valley of engine..remove air cleaner and check down inside manifold with throttle plates wide open and look for oil pooling inside intake..if there is oil in there,you to remove intake manifold and replace gasket and bolts holding rectangular pan to bottom of intake..you will need intake gaskets as well..suggest going to dealer for parts..fairly inexpensive as well..i hope this helps

Jul 19, 2009 | 1999 Dodge Durango

1 Answer

Check engine light shows misfires in two cylinders and backfires.


Yes it could. make sure to use the correct champion plugs as well. Make sure your firing order is correct as the intake shouldn't cause a back fire. 1-8-4-3-6-5-7-2.

Jun 29, 2009 | 1999 Dodge Durango

1 Answer

97 Mitsubishi legnum,runs great but takes a bit to start, thought it might be fuel pump relay as you can,t hear pump start when key is turned on, is that normal for legnums.


Hi,
is your car a GDI engine? If it is GDI you can't really hear the pump working when you put ign on.
Give me some details and I might be able to guide you there.
Chassis, engine numbers, GDI ??

Apr 23, 2009 | 1997 Mitsubishi Galant

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