I put in a new carburator, fuel pump and took it to the cadillac dealership and they couldnt figure it out. Any ideas as to what can be causing it to backfire? Could it be the distributor? Please Help!!
2006-09-15 14:53:10 · 4 answers · asked by dream 1 in Cars & Transportation ➔ Maintenance & Repairs
You have guess it right the distributor. In the distributor you will find the rotor, the electricity that feeds the spark plug to fire passes through the distributor. The off and on cycle of the contact point feeds the electricity to the right spark plug base on the firing order of the engine. Now if the rotor is not in full contact with the terminal in the distributor cap the spark plug won't fire for lack of electricity and the fuel in the cylinder won't ignite. The fuel would be expel without burning thus causing the back-firing. If there are several cylinder affected by this malfunction then certainly it would slow down, because of the reduce power of the engine. Now there are several things you have to do; test the ignition coil if it is overheating or not, if it is, it would not give the correct amount of electricity to feed to the spark plug. If it is OK, then look at the rotor and distributor cap. The rotor tip should make full contact with the lead terminal in the distributor cap, thus completing the circuit that provides the electricity passing through the high tension cable leading to the spark plug. If it doesn't then replace the rotor and the distributor cap. The contact point should be inspected for proper contact sequence and undamaged contact surface. A professional should be consulted on this.
2006-09-15 19:06:24 · answer #1 · answered by Happyman 2 · 0⤊ 0⤋
It is possible that the distributor cap might have a hair line fracture in the cap itself and moister can collect rapidly causing
it to cross fire or the rotor under the cap needs to be replaced also so try replacing both.
2006-09-15 22:08:31 · answer #2 · answered by kh50599 2 · 0⤊ 0⤋
If you have the old style voltage regulator, this is your problem. Had a 72 Impala that did the same thing and the dealer couldn't find the problem, it took me all day with a test light to track it down. The old style voltage regulator is external and is box shaped. The new style in internal inside the alternator. The new style will not cause this problem.
2006-09-15 22:17:18 · answer #3 · answered by Anonymous · 0⤊ 0⤋
Maybe the points in the distrbutor distributor or try dual point and better plugs and K&N air.
2006-09-15 22:02:53 · answer #4 · answered by Anonymous · 0⤊ 0⤋