Question about Cars & Trucks
Hi iam using cd 4040 for making a time circuit the pulses are coming from a cd 4060b ic cd 4060 pulse connect to clock pin no 10 of cd 4040 b its is not on the power supplay is ok and reset pin is connected to 10k resister via earth give a method to the proper work
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Posted on Jan 02, 2017
SOURCE: no pulse at injectors
The normal way that injectors are controlled is via the permanent application (ignition on obviously) to one side of the coil that operates the enclosed piston, and the precisely timed application of ground (negative) to the other side of the coil.
The transistors that control this switching under the command of the engine computer are typically contained within the computer itself.
Measuring the voltage at the injectors is not productive since the common multimeter is incapable of detecting the very short pulses that activate the coil. Some kind of visual means would be needed to observe this pulse such as an oscilloscope or an engine analyzer equipped with a 'scope.
It's unlikely that all of the switching transistors (or the injectors) have failed simultaneously so either the computer has a problem or there is no fuel being delivered to the fuel rail that feeds the injectors. You should find a pressure regulator that sits between the fuel line coming from the tank that controls the fuel pressure for the injectors. This device seem to be a sore point in many vehicles and can make it appear that the injectors are not working. Many fuel rails have a fitting similar to a tire valve to allow the testing of the pressure being delivered. I would recommend you check this before assuming that the injectors are at fault.
Posted on Nov 14, 2008
Found a blown 5A fuse in the fusebox under the right side of the steering wheel (near driver-side door). Replaced this, and all symptoms appear to have gone... question is, what caused the fuse to blow in the first place?
Posted on Jan 04, 2009
Check out your oil sending unit, fuel pump and relay, check for power (might be a fuse), the ignition control module (which if you remove it, can be tested for free at AUTO-ZONE), any related wiring, pick-up coil (inside the distributor), and possibly the ignition switch. If I can be any more help just as away.
Posted on Jun 06, 2009
Hello jlwhelchel: My name is Roger and I will answer your question. Raise the hood locate the wiper motor. Remove the cover held on by three screws. Remove the cover. The cover is the module.
Should you need further help please just ask. Please rate the answer. This way I know the information was helpful. Thank You for using Fix Ya. Roger
Posted on Oct 16, 2009
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