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I have a nissan sentra 1989 that won't start. The carburator was changed and I have enough fuel pressure. The timing of the camshaft is ok, I also have a lot of spark but it won't start. I checked the firing order in a repair manual, but in the car is different. I tried the way the manual said but no luck. The car does everything else the starter moves it has a lot of compression. I really don't know what else to do. Please help.
Answer -
Did the car start before you changed the carburetor or did the problem start after the carburetor was changed?
Put the plug wires back the way they were before.
Make sure the fuel mixture screw is turned out 1 1/2 turns and then give it a sprits of starter fluid. Be sure to put the air cleaner back on before you attempt to start the car to avoid the risk of a backfire and and engine fire.
Write me back after doing this and let me know how it goes.
Reply
The car was running but after reaching normal temperature it stall and turn off. That was the reason we changed the carburator. After the change the car started to run pritty good but after a couple of weeks the stalling problem came back again. It got worse and the car did not started again. I have done the starting fluid procedure many times but to no success. I don't know if I have problems with the coil module. Thats my best bet right now. Thanks for the help.
Answer -
I would be looking at the carburetor and the filter to see that the car is getting gas. With the key in the off position look down the throat of the carburetor and see if it is getting gas when you move the throttle to the full position. Does it get gas? If it does you are right that you have another problem and it is probably ignition related. Also, on that Sentra there is an electronic connection that makes the power valve work. I have changed several of these and most rebuilders do not replace them with new when they rebuild the carburetor. I think it is called an electronic power valve. If this is stuck in the open position you could be flooding all day and never get the car started. The last one I replaced was stuck partially and it was causing the car to fail smog check.
Reply.
Where is this power valve located. Ihad never heard of it before so I don't know where it is. Also remember that I replaced the original carburator for an after market one. Thanks.
AnswerOK I figured out that you have an aftermarket carburetor. So, check the fuel filter and see if it is clogged. That is probably going to be fine. But, just to be sure. Now, I think I understand the problem. Take the cap off the distributor and the rotor. Now, under the cover there is the optical sensor that tells the computer to fire the plugs. The oil seal in the bottom of the distributor goes bad after this much time and oil gets into the workings of the optical sensor and that is probably what is causing your problem. Before you take the distributor apart check to see if the plugs are getting fire. Take a plugwire off and insert a paper clip into the end to get contact with the contact that attaches to the plug and hold is aobut a quarter of an inch from teh block and then have someone crank the engine over. If there is no spark it is probably the coil or the distributor.
