1994 Chevy Blazer 6.5L Turbo Diesel - No Fuel At Injectors
February 16th, 2024, 9:43 PM
#1
CF Beginner
Thread Starter
Join Date: Feb 2024
Posts: 1
Likes: 0
Received 0 Likes
on
0 Posts
1994 Chevy Blazer 6.5L Turbo Diesel - No Fuel At Injectors
1994 Chevy Blazer 6.5 Turbo Diesel, has no fuel to injectors.
The vehicle sat up for a while and I took various steps to clean, replace, and inspect parameters, but still no fuel to injectors.
1. I cleaned the tank and filled with fresh diesel,
2. Inspected the Lifter Pump and it is operational with expected fuel pressure,
3. Replaced the Fuel Filter, Gasket, and Cap,
4. Bled the Fuel Filter until diesel came from top,
5. Made sure diesel was coming out of every other place it was supposed to,
6. Cracked the injectors loose, no fuel to injectors.
Every port on the Injector Pump that is supposed to have fuel is dispensing fuel, but the cracked injectors are dry. When the key is in the ON position, the solenoid on the IP makes a sound as if it is working. I tested the plug going into the top of the Injector Pump and every pin read a voltage between 3v - 37v. The Fuel Injector Control Module is externally mounted with a heat sink and not tested as I do not know how.
The vehicle also had a Valet System in it for an after-market security system. I removed the system as it failed awhile back (reason for it sitting for a while). I did not install this system, so I have no clue as to what wires it clipped into and why. The system was installed with Wire Tap Connectors, so after removing the Valet System, the original factory wires are still connected and whole.
When I put the key in, the dash lights come on, the Solenoid on the IJ Pump sets, almost all dash lights go out, glow plugs warm, I turn the key to start, and the engine turns over pretty good.
All gauges function and oil pressure rises.
The vehicle sat up for a while and I took various steps to clean, replace, and inspect parameters, but still no fuel to injectors.
1. I cleaned the tank and filled with fresh diesel,
2. Inspected the Lifter Pump and it is operational with expected fuel pressure,
3. Replaced the Fuel Filter, Gasket, and Cap,
4. Bled the Fuel Filter until diesel came from top,
5. Made sure diesel was coming out of every other place it was supposed to,
6. Cracked the injectors loose, no fuel to injectors.
Every port on the Injector Pump that is supposed to have fuel is dispensing fuel, but the cracked injectors are dry. When the key is in the ON position, the solenoid on the IP makes a sound as if it is working. I tested the plug going into the top of the Injector Pump and every pin read a voltage between 3v - 37v. The Fuel Injector Control Module is externally mounted with a heat sink and not tested as I do not know how.
The vehicle also had a Valet System in it for an after-market security system. I removed the system as it failed awhile back (reason for it sitting for a while). I did not install this system, so I have no clue as to what wires it clipped into and why. The system was installed with Wire Tap Connectors, so after removing the Valet System, the original factory wires are still connected and whole.
When I put the key in, the dash lights come on, the Solenoid on the IJ Pump sets, almost all dash lights go out, glow plugs warm, I turn the key to start, and the engine turns over pretty good.
All gauges function and oil pressure rises.
Thread
Thread Starter
Forum
Replies
Last Post
Ianmac
1988 - 1998 (GMT400)
21
March 22nd, 2020 11:34 AM
Kamelred408
Tahoe & Suburban
7
January 15th, 2020 4:02 PM
