I am trying to tune up a 1990 Cadillac, replaced the distributor cap and rotor, repl'd spark plug wires and plugs....repl'd air and fuel filters. But, the car still stalls out sitting at idle and the engine shuts down when I place it in gear.
Is there a Mechanic that can give me some other areas to check? I haven't checked any computer codes.
2006-09-17 02:20:29 · 4 answers · asked by mechanic 2 in Cars & Transportation ➔ Maintenance & Repairs
Fuel pumps don't have a predictable life... they can last 300,000+ miles or fail with only a few miles on them. First thing to do is check to see if the "Check Engine" light is on. If it is, then you have some codes in there and you'll want to retrieve them. They may give you some hint as to what is going on. If you suspect the fuel pump is the culprit ..you can get an inexpensive fuel pressure tester at your local NAPA store. You should also look for vacuum leaks and check the timing. Another common problem with early 90's GM cars is the MAP sensor and the MAF sensor. Both could cause the problem you are having. Other possible causes are a clogged catalytic converter, a bad torque converter lock up solenoid, a faulty distributor pick-up coil or control module, or an EGR valve which is stuck in the open position. Good luck with it.
2006-09-17 02:35:09 · answer #1 · answered by lowrider 4 · 1⤊ 0⤋
Based on your question and the milage of your car only. Try this if you dare. the fuel pump on most cars now is in the fuel tank. Deposits in gasoline build up in a small filter screen at the pump clogging it up and prevent the fuel from getting to the engine. Electric pumps take up to 40 lbs of pressure to do their job and if there are deposits in the tank, you have problems. The tank will probably need to come off in order to get the pump out, get a mechainic's manual from any library and see if you are capable of doing it yourself. Otherwise, losen up the purse strings bud, you're goint to have to pay someone to do it for ya. Also remember that if the pump doesn't pump the reqired lbs, the engine will not work properly either...Carbureted or injected, the back pressure has to be there.
2006-09-17 02:47:59 · answer #2 · answered by GUILLERMO U 2 · 0⤊ 0⤋
It sounds as though you have a vacuum leak. If the car is an automatic, which I suspect it is given that it's a Cadillac, there probably is a vacuum hose running from the manifold to the transmission. The hose is probably defective and often will cause the symptoms you mention when it is in bad condition. If that isn't the problem, then check all of the other vacuum hoses for leaks or disconnections. Lastly, all else failing, have the manifold checked for leaks. A leaky manifold can also cause these symptoms.
Good luck.
2006-09-17 02:31:40 · answer #3 · answered by quietwalker 5 · 0⤊ 0⤋
Check the fuel pump pressure
2006-09-17 02:22:20 · answer #4 · answered by ? 6 · 0⤊ 0⤋