Runs a little rough, replaced started in last 2 months
Check on the steering rack for a electrical switch ?? hold it a 1988 model ?? with a manual pump??
SOURCE: 1994 deville 4.9 stalls while
1994 cadillac deville 4.9 engine stall and will start right back up stalls after it warms up no codes showing 50000 miles on it all sensors check out ok possile problems maybe coil,ignition control module does any one know what else it could be I will be putting on a new distributor cap,rotor,coil,and ignition control module tomorrow any other suggestions fuel system seems fine
No need to spend money on unneeded Ignition system components, check your fuel pump pressure. When faulty fuel pumps warm up, they quit or reduce the fuel pressure output, this is why it stalls. The gasoline keeps the pump cool, so a minute later, the pump is cold and pumps normally until it warms up again. OEM fuel pumps last an average of 10 yrs. if yours is the original pump. do the math.
If you don't have a fuel pump tester, borrow one from AutoZone or similar auto parts store. With the ignition On and engine Off (zero vacuum), system fuel pressure at the pressure test connection should be 46-59 PSI. With the engine running you should have 50 psi steady, if more than that, the fuel pressure regulator is faulty, if less, the fuel pump is defective.
The Schrader Valve (looks just like the valve on your tires) is located on the fuel rail, covered with a cap like the one on the tires. Here is how to hook up the tester.
LOCATION OF THE FUEL PRESSURE SERVICE PORT (1) ON A CATERA 4.9L ENGINE
A HELPFUL - 4 THUMBS - Rating and a TESTIMONIAL would be greatly appreciated if you are satisfied with this solution.
SOURCE: 2003 cadillac deville rough idle with blinking ses
have the head gasket checked,pretty common on these
SOURCE: I have a 1999 Cadilac Deville that I replaced a
Are you sure the thermostat was in the wrong way ?.
The thermostat is located in the bottom hose unlike most conventional cooling systems.
The thermostat in the Northstar engine is a dual action device.
One end of the stem is the Thermostat(obviously) and at the other end is a spring loaded pressure valve(the thinner end).
Make sure the thermostat end is nearest the rubber hose and the pressure valve end is in towards the engine.
Also note that the cooling fans don't come on until the coolant temperature hits around 225 degrees.
During normal highway driving the fans will very rarely come on(if at all) due to constant air flow through the radiator.They will only usually come on in heavy traffic conditions on a hot day.
But......if you have the Air Con switched on, the fans will run all of the time.
For overheating problems consider the following......
The most common overheating problem with the Northstar engine is a blocked purge line(small hose).The purge line is designed to purge air out of the cooling system.
There is a small diameter hose coming from near the top of the coolant tank (not the cap) ,this is the purge line.
With the engine idling,pull the purge line from the tank,if there is no coolant flow from this small hose,it is blocked and this will cause overheating.
If the hose is clear, check for blockage at the nipple on the tank.Or trace the hose back until you find the blockage.
The hose goes in to the engine to a crossover and comes out the other side close to the thermostat housing,the blockage may be there.
Testimonial: "Thank you very much for your help. The spring of the thermostat was towards the rubber hose and it was the wrong one. I did have a blockage in the purge line. I also found a small leak somewhere under the crosover pipe. This is my first experience with a northstar 4.6L engine. I realy like the car, I just got to learn how to take care of it. Thank you so much again for your help and if you can tell me any thing else I should know I would be forever greatful. Richard "
SOURCE: cadilac deville 2001 runs hot when you get into
The most common overheating problem with the Northstar engine is a blocked purge line(small hose).The purge line is designed to purge air out of the cooling system.
There is a small diameter hose coming from near the top of the coolant tank (not the cap) ,this is the purge line.
With the engine idling,pull the purge line from the tank,if there is no coolant flow from this small hose,it is blocked and this will cause overheating.
If the hose is clear, check for blockage at the nipple on the tank.Or trace the hose back until you find the blockage.
The hose goes in to the engine to a crossover and comes out the other side close to the thermostat housing,the blockage may be there.
Also note that the cooling fans don't come on until the coolant temperature hits around 225 degrees.
During normal highway driving the fans will very rarely come on(if at all) due to constant air flow through the radiator.They will only usually come on in heavy traffic conditions on a hot day.
But......if you have the Air Con switched on, the fans will run all of the time.
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