I wish I could answer you but I am having the same problem with my 89 Chevy s10 everything was fine till working on distributor. put new computer in still not help have fuel pressure. If you fixed your problem maybe you could give me some info?
A 92 Chevy Caprice that has no injector pulse mostly likely has clogged injectors or a defective fuel pump. Fuel injectors must be cleaned periodically to removed buildup for peak performance.
The ecm does with input from various sensors.
when ignition is on it should be battery volts,when cranking in should pulse..(test with a led test light or osilliscope
The engine computer (pcm) controls the injector pulse. It looks at numerous sensors and switches to calculate pulse width
1990 ford ranger 2.3 no injector pulse what causes this
200 Nissan exterra v6 have spark and injector pulse no power to fuel pump
tools u can use are a noid light....or an injector pulser ''TOOL''
Pulse width is the time in milliseconds that the injector is energized, the duty cycle is the percentage of on-time to total cycle time
Injector pulse is controlled by the ECU. Injectors Have a red wire that is hot. Black wire is controled by computer ground...
Check for FP leaks at the FP regulator and gasket (at TB unit) and possibly leaky pump.
No pulse signal to injectors (bad injector relay or PCM driver circuit).
The engine computer.